news - SAMAA

Transcription

news - SAMAA

news
Issue 2 of 2015
Newsletter of the South African Model Aircraft Association
Published electronically/digitally.
Our Mission: To add value to your flying experience through communication,
information, promotion, education and the support of dialogue
TOSS Aerobatics 2015
by Kevin Farr
Chapman’s Peak on Saturday morning. Vignette above shows Hans van Kamp launching Aresti.
Clickety Click...come in number Six. Six years of pure-bred aerobatics
contesting and still the slope gods bedevil the event and add spice to the
2015 Two Oceans Slope Soaring Aerobatics competition. As per usual, Dave
Greer flew in from Durban to once again attend the event as he has done
since the inauguration. All plans were finalised and an unseasonal North
Wester was predicted, something that happened rather too often during this
summer, which is generally governed in our part of the world by howling
incessant South East Trade winds. But alas, the wind models ruled, and the
Saturday morning dawned windless with the very lightest of North Westerly
breezes rustling the leaves. A call was made to gather at the Fish Hoek power
field, and so the lads took to a bit of electric flat field flying while munching on
the breakfast supplied by the excellent caterers. As the morning progressed,
the wind started to gather and so a decision was made to gather at the
Chapman's Peak site and see in the wind.
Hot and bumpy was the order of the day, with massive lift and heavy sink all
playing with the high speed gliders that were able to jump, limp, and scream
from one pocket of lift to the next.
Dave Greer from Durban claiming first place in the
Sportsman-class. Shown at left with his Mini-Vector.
Sportsman's class was next up and the conditions were really starting to work
well and so they battled it out while the judges took note. At this stage our
venerable friend from Natal, Dave Greer up and took the event from all
around him with a well timed charge.
By lunchtime, conditions had still not settled enough to call a clear round of
competition and so your scribe took a runner to Signal Hill to assess the
situation there. One of the weirdest things of this part of the world is that you
can literally have four seasons in one day, depending which part of the
peninsula you are on, and true to form, the North Wester was howling
through at Signal Hill. A quick call to the Contest Director, and all participants
made for Signal Hill.
But, true to form, as the crew arrived and set up for a round, a fog started to
develop on the lip of the hill and eventually became a thick blanket racing
through at hill-top level as the ice cold air hit the warm hill, and visibility was
reduced to zero in a matter of minutes. All contestants then took to sitting like
gorillas in the mist and chatting the remaining hour of so away, before
heading home.
Sunday dawned clear as a bell, but with the wind predicted from the North
West, which adds a level of oddity to the event, as the traditional South East
trade wind should have ruled the event, but went missing. An early morning
recon to the Chapman's Peak showed light at best, and so a scout was sent
to Signal Hill. Although light, the conditions were as smooth as silk, and had
the energy to support a round of aerobatics. The rest of the contestants
dutifully charged up the hill and set up camp.
Kevin Farr and the 4m ASW.
Your scribe decided to test the limits of the competition, in the interest of
looking at a possible scale class next year, and flew the 4 metre scale ASW
through the Sportsman's round in as scale a fashion as possible. In the end
the high class Vector 111 and Mini Vectors ruled the class, as being
specifically built for the purpose at hand. And it was our ever popular Dave
Greer that took the Sportsman's class and earned himself the “Rock of
Support” award for attending the event each and every year since inception,
as well as the coveted first place.
With paragliders in the air at the same time it was sometimes a tough task to
avoid them and complete a manoeuvre. Expert class were first out the blocks
and the battle raged through the morning hours through to lunch, with
conditions slowly improving throughout the day.
The top three were as close as can be again, and between Christo, Marc, and
Louis they had a fantastic battle. Christo le Roux flew proud with his Taranis
talking him through his round, and showing the potential of the radio to assist
in practice as well as competition, and he took a well-deserved first position,
followed by Louis Genade and Marc Wolffe.
Marc Wolffe’s Primarius gets the heave-ho.
SAM A A News Issue 2 of 2015 - Page 1
Our unbridled thanks needs to go to the Judges, Andrew Anderson and
Stuart Nix for their sterling effort on the day and their due diligence over the
years, Andrew specifically having been a judge at each and every event so
far. A large dollop of thanks go to Jeff Steffen and Bill Dewey for being the CD
and the safety officer on both days and for making the tough calls. Thanks to
Dave Semple and Georg Lerm for handling the scoring, and to the caterers a
great big old thank you once again for keeping the mob fed and happy.
Judges Andrew Anderson and Stuart Nix.
Alan Ball after retrieval of Vector.
Alan Ball with assistance from Malcolm Riley.
Christo le Roux wins the Expert-class.
Ryan Matchett and Dylan Else get scored.
Louis Genade (Tx) and Hans van Kamp.
Participants and judges get the photo call, with Table Mountain and clear skies in the background.
One of the great things about the event is as always the stunning prizes given
by our awesome sponsors who we cannot thank enough for the never-ending
support of the hobby. Till next year, slope soar your hearts out, but come back
for the event.
Sportsman Class
Expert Class
In the Sportsman-class, contestants will fly the
five mandatory manoeuvres, plus any other five
manoeuvres that must be chosen from the list of
fifteen optional manoeuvres. The number to the
right of the manoeuvre is its “K” or “difficulty
factor”.
In the Expert-class, contestants must choose
any five manoeuvres from both list A and list B,
for a total of ten optional manoeuvres. The
number to the right of the manoeuvre is its “K” or
“difficulty factor”.
No.
1.
2.
3.
4.
5.
Mandatory manoeuvres
Split S
Straight inverted
Double Immelmann
Half reverse Cuban Eight
Two rolls
K Factor
2
2
3
3
3
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
Optional manoeuvres
One roll
Stall turn
Immelmann
One inside loop
Half Cuban Eight
Two inside loops
Outside stall turn
Three inside loops
Vertical eight
Reverse Cuban Eight
Cuban Eight
Barrel roll
Rolling loop
Square loop
2
2
2
2
3
3
4
4
4
4
4
4
5
5
No.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
List A manoeuvres
Alternating roll
Slow roll
Four-point roll
Three rolls
Ching Ching Chong Chong
Four-point TOSS roll
Figure M
Thread the needle
Sharks tooth
Damian roll
Eight-point roll
K Factor
5
5
5
5
5
6
6
6
6
7
7
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
List B manoeuvres
Cuban eight
Downward six
Rolling loop
Three outside loops
Square loop
Horizontal eight
Outside Cuban eight
Outside reverse Cuban eight
Twisted loop
Outside barrel roll
Horizontal eight with half roll
Sunny side up
4
4
5
4
5
5
5
6
6
6
7
7
Malcolm Riley launches Aresti.
Nic Steffen launching Noel Cochius’ Vector.
Results
2015 Two Oceans Slope Soarers Aerobatic Event
Pl.
1.
2.
3.
4.
5.
6.
Sportsman Class
Pilot
Dave Greer
Hans van Kamp
Ryan Matchett
Kevin Farr
Dylan Els
Schalk Human
Perc.
100.00
97.53
92.15
91.48
56.50
50.22
Pl.
1.
2.
3.
4.
5.
6.
7.
8.
Expert Class
Pilot
Christo le Roux
Louis Genade
Marc Wolffe
Malcolm Riley
William Cranmer
Alan Ball
Steven Meusel
Noel Cochius
Perc.
100.00
98.50
81.47
66.40
64.90
61.10
56.27
46.72
“Slope soar your hearts out, but come back next year!”
Lime Acres
2015
Text and photos
by Wynand Swart
Anthony Oliver from Bloemfontein with his beautiful J-10 jet. Sorry for the crash, but we know you can fix it for next time.
What a weekend with friends! This third fly-in at Lime Acres was once again
one of the best events for the model aircraft enthusiast. It was hosted by
Petra Diamond Mine in Lime Acres on the mine airfield, on Saturday, 2 May.
The pilots started arriving on Thursday and made the most of the runway.
Many large scale aircraft and jets, as well as a large variety of smaller scale,
electric, 3D aircraft, and nitro planes were flown.
Pilots came from Bloemfontein, Welkom, Kimberley, and Gauteng to support
the event which was organised by Owen Smith and his brother, Brian Smith
and supported and enjoyed by the pilots and their families and friends, as well
as the local public. There were people cooking, and serving pancakes, and
sosaties, and boerewors, and hamburgers, and cool drinks, and ice-creams.
The event was opened by Owen Smith and pilots briefing was handled by
Wynand Swart. Safety was the main issue for the weekend with no aircraft
filling and spilling fuel on the runways.
by Keith Renecle. Photos by Theo Kleynhans, Andrew de Beer,
Marietjie Skinner,
Above left... Koos Pretorius from Gauteng: “Can I park my YAK up there in the
hangar; I still want to fly tomorrow morning before we go back to
Johannesburg?” On the right, Wesley Denysschen from Gauteng is starting
the engine of his 100cc YAK, with a relaxed Werner Swart from Bloemfontein
helping him.
Most of the pilots and their families stayed at the IMPI Guest House where
they enjoyed excellent meals and accommodation, and were treated like
royalty. The facilities were first-class, and many stayed up late to enjoy the
live music and discussions about the day's flying.
On Saturday evening at the IMPI Guest House, we enjoyed 5-star treatment,
entering the dining room on a red carpet and welcomed by waitresses
dressed as air hostesses. It was a real 'collar-and-tie' evening, but jeans and
tackies were welcome.
Owen had been watching and making notes during the day and each pilot
and random supporters received appropriate prizes. The décor was
amazing, with little airplanes everywhere. Modellers generally like to braai,
but this was an evening of good food and 5-star treatment enjoyed by all.
On Sunday many were back at the airfield to make use of the runway one last
time. The gates were finally closed at 13:00.
In the photo above, Wynand Swart from Bloemfontein is getting final
instructions from Boet Denysschen before take-off with his Dolphin Jet.
Boet’s instructions were exact: “You never listen when I tell you what to do”.
A big thank you to everybody involved with this fly-in. We hope to see you all
at Lime Acres next year.
Below left is the scratch-built P-40 Warhawk scale model by Gerhard van der
Watt from Kimberley. At right is Jan van Soest from Klerksdorp working on his
Boomerang jet before starting up and taking-off.
Pilots like Pierre Fouche from Bloemfontein, Ian
Mandy from Kimberley and Chris from Welkom
getting ready to fly
One of the small paper aeroplanes that were
placed on the dinner tables, a very good idea
from the IMPI Guest House.
Sound systems for RC planes
The 10 in the speaker model means 10cm diameter, and 13 means 13cm.
The 13 cm gives dramatically better bass notes, which sounds great, but may
not fit so easily. The R10S cost about R150. The FR13 is more, and the
FRS10WP is about R650. This is a rugged waterproof speaker for fitting in
buses and train stations. I use two of these in my Spitfire, and the sound is
loud. Some of these speakers are available in South Africa from RS
Components and other suppliers.
You can buy cheap car radio speakers, but they have large magnets and are
heavy, and less efficient. Perhaps if you can use a higher power amplifier of
say 100watt they might be loud enough. Other speaker types are also
possible, such as oval shapes which may suit a slim fuselage.
By Neil Allen
Neil's 1/5 scale Spitfire Mark XII from a Dave Platt kit
Electric power for scale models solves the power issues excellently, except
for the non-scale like sound they make when flying. Thomas Benedini of
Germany has filled this need very effectively. He created a sound generator,
that is linked to the throttle, and gives startup, shutdown, and all the sounds in
between. Full details and prices are on his website. Just google “benedini
sound”, and choose the English page. His systems are sold by HobbyKing,
but I think his prices are a bit cheaper, and he can ship you a unit with
whatever speakers you choose. The unit comes with your choice of a huge
range of engine sounds, and he will change them for you at any time for
nothing, or they can be downloaded for free, if you get his adapter cable. Brief
sample sounds can be listened to on the website of his US distributor,
Aerosound, which is also easily googled.
A sound system has to have a weight of loudspeakers, and you have to
choose how loud you want it to be, which means how heavy a weight you are
prepared to carry. I reckon that a weight of perhaps 6% of total flying weight
gives a good sound level. Small foamies are also quite practical for a sound
system. Smaller planes fly closer to the pilot, so need much less sound
power. I think even a sound system of a low weight is better than nothing. At
least you can enjoy the startup and switchoff, and hear it a bit in the air.
There are excellent articles on the Benedini system, if you go to their
downloads page, and read the articles by John Ranson. You can also
download the instruction manuals for the components.
To make up a system you have to select the components you want, and put
them together with soldered connections. There is always someone
competent in a club that can help, or you can ask me for advice.
A speaker needs as large as possible a space behind it. The bottom of the
fuselage is perfect, but you must make holes in the formers to form one big
volume. If the speakers are in the bottom of the wing, you need holes in the
wing ribs. These air boxes must be sealed off from the outside air, with items
like wheel retract holes isolated with balsa “walls”. The speakers should face
downward to be heard in flight, but this has the advantage that holes or grilles
underneath are not noticeable when the plane is seen on the ground.
Sound generator. The one you want is the TBS Mini. It weighs 6 grams.
Amplifiers. I use two 40watt amps from Benedini, which run off my 12s (50
volt) power batteries. When I look at the catalogue now, I see these are not
listed anymore. Also, he now recommends adding his inexpensive optoisolator if you are using your flight power batteries.
He lists several amplifiers on his site. For bigger planes, the choices are:
Single 40watt. Weight 8g. Speakers 8ohm, which can be two of 4ohm in
series. Power is 3s to 6s. You can use half of a 12s motor battery pack as he
explains. This amp runs cool. I think one or more of these would suit a large
plane very well.
Four X 40watt. Weight 40g. Speakers 4ohm. Power is 3s to 4s. This amp runs
very hot, and needs cooling air. You could drive a mixture of different
speakers off this one amp, but if you are flying with 10s or 12s batteries, you
would need a separate battery to supply it.
You can hear the sound system in Neil's Spitfire on YouTube. Just enter
"spitfire r/c model neil allen" in the search bar. It is low quality, shot with a
pocket camera, but adequate.
Loudspeakers are the heart of the system. I list here in ascending order of
noisiness, some likely choices. I know nothing about very small systems
though. The loudness is in dB, which is a log scale, and a bit confusing. Note
though, that each time you double the volume, you add 3dB more.
Benedini uses Visaton brand speakers, which also come from Germany.
These are used worldwide, and the pricing and efficiency is good.
Quantity
used
Speaker
model
Weight
grams
1
2
1
2
2
R10S
R10S
FRS10WP
FR13
FRS10WP
180
360
360
560
720
Max watts
power total
13
26
30
60
60
Sound level
dB
Impedance
ohms
96
99
101
102
104
4/8
4/8
4/8
4
4/8
Notes. The little R10S is very light, and the manufacturer claims 20watt
power. But everyone who buys them blows them up at this level! They can
only take 13w maximum. There is a volume control that you adjust, or
Benedini can set up the amp of your choice to suit your speakers. You can
test the wattage fairly easily with a multimeter, or you can run them for a few
minutes and feel the speaker temperature. Gently warm is okay, hot means
not okay! Speakers are rated for continuous or music power, such as
20/30Watt. Use the lower figure only.
Speakers mounted in Spitfire fuselage. The two high-power Visaton speakers facing downwards.
They are mounted in a trough, which allows cooling air to pass over the motor, speed control,
and amplifiers, and exit out of the same grille as the speakers. I think if I did it again I would
rather mount the speakers flush on the bottom of the wing, and let the cooling air exit further
back along the fuselage – maybe even by the tail wheel.
Underside of Spitfire wing showing speaker grilles. The rear one is not used currently. The grille
material is two layers of perforated stick-on vinyl from a signwriters shop, where it is used for adverts
on taxi back windows.
Another scale aircraft fitted with a sound system. Leon Coetzee on the right with his Nieuport 28.
Langebaan visit
his transmitter to create flying surface deflections, amazed the modelers.The
evening continued with speeches on
- how the hobby grew and evolved from the early days
- the evolvement of the different clubs that started from the original club
W.P.M.A.C. to where we have progressed today
- the products we used, their reliability, and how they grew
- the isolation years
- international experiences and friendships
- safe flying and safety issues
by John Calefato
The presentation ended with lots of tasty snacks and coffee, all produced by
the wives of the modelers. A big thank you to them all!
The last hour or two we spent at Dave's bar where many tall and short stories
were told, all well encouraged and promoted by our two 'seremoniemeesters' Dave and Anton.
John Calefato (left) and Hardy Hoffman with an array of historical model aircraft.
Hardy Hoffman and I were invited by the ArcelorMittal club at Langebaan to
give a talk and presentation of the early days of flying in the Cape. They
requested that we bring along some of the early models we flew, with the
motors and radio control systems of that era.
After picking up Hardy at his home with his antiques (??) we departed for
Langebaan where we were to meet Anton Bothma, an old friend, member,
and former chairman of TMFC. On arrival in Langebaan we went with Anton
to the Driftwood Restaurant which has a beautiful view overlooking the
lagoon. Anton entertained us to a tasty seafood meal. During the lunch,
Anton briefed us on what our presentation should focus on. We then followed
him to visit the ArcelorMittal Saldanha RC club, about 10 minutes' ride out of
town. There we were introduced to Herman Wiehahn, their club chairman,
who was hard at work on their new second runway. The club has a beautiful
spacious field with two large tarred runways. They have a large modern
clubhouse with full facilities and electricity. They also have a large
undercover spectator area as well as braai facilities. Both Hardy and I were
impressed with what we saw. The club has everything in place for hosting
major events.
Our next stop with Anton was at the yacht club of which he is a member.
There we spent a relaxing afternoon where interesting past maritime history
of the lagoon was revealed over a drink or two. Next we headed for the
Masada Guest House B&B owned by Dave Allam, a prominent member of
their club who offered us free accommodation for the night. On arrival we
were pleasantly surprised by the warm welcome we received. Our two rooms
had welcoming messages pinned on the entrance doors. Our rooms were
spacious and clean with all facilities, and which we can highly recommend.
The next morning we were interrupted at breakfast by Anton who came to
invite us to his home where his wife, Samara, had baked a carrot cake which
they wanted us to share with them before leaving for home. So, after
thanking Dave, his wife, father, and friendly staff for being such lovely hosts,
we followed Anton to his home. Here we thoroughly enjoyed Samara's carrot
cake and coffee to the extent that we gladly accepted second-helpings.
Afterwards Anton showed us his well-built model room, models, and office
from where he conducts his import/export fruit business.
So ended a most enjoyable two days with our Langebaan friends and
modellers. Hardy and I would like to thank Herman and his committee for the
invitation, Dave Allam for the warm welcome and free accommodation, and
Anton Bothma for being such a good PRO and 'chaperone'.
For SAMAA members who would like to visit Langebaan and do some flying,
please contact Dave Allam at Masada Guest House, 18 Loop Street, Long
A c r e s , L a n g e b a a n 7 3 5 7 . Te l . 0 2 1 - 7 6 2 - 1 5 4 3 , e - m a i l
[email protected] Dave offers accommodation discount for
SAMAA-members who are visiting and would like to do some flying. While
there, you can also visit Dave's hangar and workshop where some of the
finest large scale model aircraft are to be seen, a worthwhile experience.
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New shipment of composite gliders arriving soon!
www.alshobbies.co.za
The highly-recommended Masada Guest house. Look it up when you are in the area!
Our evening presentation area was the Masada Guest House reception hall,
flanked by a new and cute bar. Hardy and I laid out our antiques (??). One by
one, modellers from the local and outlying clubs arrived, approximately 30.
We enjoyed meeting old modelling friends, the likes of Ivan, André de Beer
and Otto Blanckenberg – one of Westcoast's most prominent modelers and
promoter of our hobby, and thorough gentleman. Also a few more smiling
faces whom we knew but whose names we can’t quite place.
The presentation went off well with Hardy demonstrating his beautifully-built
rubber models, including his old single channel model with original r/c and
motor, all in working order. I demonstrated my old A2 glider which I flew in the
late 50's and 60's with (DT) burning fuse de-thermaliser. Hardy's
demonstration of his single channel model whereby buttons were pressed on
Check out our website, for best prices,
latest stock, and on-line ordering and payment!
Exit 136 Boksburg from N17 highway (Rondebult Rd R21). North for 2km, right into
Lancaster. 600m to intersection with Hertzog & Waterson, Parkdene.
GPS = S26 14 08 E028 15 11
Tel. 011 026-3313
Shop 4, Parkdene Shopping Centre, Lancaster Rd, Parkdene
Hours: Mon, Tue, Thu, Fri = 09:00 - 18:00; Wed 12:30 - 18:00.
Sat 08:00 to 13:00. Closed on Sundays and public holidays
info@alshobbies .co.za
2015 African 3D Heli Masters
by Nic van Rensburg
(Top) Panoramic view of the SMAA facilities.
(Above) Posters/adverts for two of the African 3D Heli Masters events.
The African 3D Heli Masters event started off with a bang at the Stellenbosch
Model Aircraft Academy facility on the 11th and 12th of April 2015, with pilots
coming in from all over the country, including two top international pilots from
UAE and Italy.
Day one saw tons of action with top pilots such as previous SA number one
Ludwig Fourie being punished hard for every mistake.
Arno Goosen accepting his first place trophy in the Sportsman class from Tareq Alsaadi.
The quality and level of the South African 3D competition has definitely been
raised significantly over the years, from the set manoeuvres, to the judging, it
definitely seems on par with top international levels of flying.
Day two saw even more punishment, as top pilots continued trying not to
make even the slightest mistake while being pushed to their limits. The bar for
set manoeuvres was also set very high, with only one masters pilot, Stephan
Murray, attempting the Table Mountain manoeuvre.
The second day was Sebastiano Gabutti's turn to feel the heat of the
international level of judging, failing to stick the landing on a massive
autorotation he was equally punished, pushing him down into second place.
In the end, consistency played a big role and William Cranmer managed to
take first place in the masters' class.
Ryno Ankiewicz took first place in the Advanced class. Tareq awarding him the trophy.
In advanced class, the up-and-coming young guns were also pulling off top
level manoeuvres such as piro flips, inverted hurricanes and funnels,
keeping the more experienced pilots on their toes.
Below is the winner of the Masters class and the Speed Challenge, William Cranmer.
The Sportsman's class saw a huge number of entries compared to previous
events. Even this class saw a very high level of flying with set manoeuvres
including: 3x Inverted Pirouette, 2x Consecutive Rolls in forward flight, and 3
Consecutive Inverted Travelling Pirouettes.
The speed run saw performances pushed to the maximum, with William
Cranmer taking the crown, clocking in at 202km/h average over two runs with
SAB Goblin speed setting a new South African speed record.
Alan Ball and the crew from flying robot were also on hand to demo the new
sport of FPV racing. It was definitely interesting to watch these guys do their
thing. Racing under and around obstacles while sitting on chairs, viewing
through video goggles.
Abridged results
African 3D Heli Masters. Stellenbosch Model Aircraft Academy
Sportsman
Pl.
1.
2.
3.
Name
Arno Goosen
Paul Demmer
Carlo Steyn
Advanced
1.
2.
3.
Ryno Ankiewicz
Wessel Venter
Brad Grobler
Masters
1.
2.
3.
Willian Cranmer
Sebastiano Gabutti
Stephan Murray
Speed
1.
2.
3.
William Cranmer
Peter Rossouw
Sebastiano Gabutti
o
see als w.
w
a/
http://w llenge.co.z
a
ch
3dheli
sults
african apetownre
c
202.45 km/h
197.71km/h
189.89km/h
“Many hands make Goblin fly”.
The display tent showed a variety of equipment.
William Cranmer and Tareq helping Paul Demmer
to prepare his Goblin for a competition flight.
Tareq Aalsadi has been to South Africa a few times.
Trophies for the various classes, sponsored by
Goblin Hobbies.
Sebastiano Gabutti’s Goblin, and below right, a
Goblin doing what it does best!
Tent showed professional organisation.
ENGINES WANTED
Two awards made by Paul Demmer, accepted
by Tareq Aalsadi.
Old model aircraft engines; diesel, spark-ignition, or glow.
Good prices. Contact Dave 076-494-1184
The author demonstrated his basic theory, using the popular Goldberg
Falcon design of its day. It was sold in three sizes: Senior Falcon, Falcon 56,
and Junior Falcon. You will see on the graph, that all three sizes of the Falcon
fall in the area inside the diagonal lines marked "Trainer". And all three planes
fly the same - exactly as you would expect a trainer to be. These diagonal
lines, which are just areas of high, medium, or low wing loading, are the heart
of the graph. I have had several model aircraft which were in the "too heavy"
area, and they required extremely high take-off and landing speeds. Some
jets are here, and that is why they need long runways, and do not glide very
well when the engine or turbine cuts.
An essential chart for
RC modellers
by Neil Allen
The author added power loading dashed lines, with the scale along the top,
but said that these are only very approximate guides. For example, you can
take a plane like a trainer with a .40 glow motor. If you power it with a .20
motor, it will take off and climb slowly, but still flies like a trainer, landing nice
and slowly. You can power it with a .90, and it will have dramatic speed, but it
will still land like a trainer.
The graph is very easy to extend for bigger sizes. If you measure with a ruler
the distance from 20 ounces to 40 ounces, it is the same as 2 pounds to 4
pounds. That same measurement will take you from say 22 pounds to 44
pounds. Wing area works similarly. Interestingly, if you extend the graph right
up to a full size plane, it still works!
Knowing the weight and wing area of a model aircraft gives you its wing
loading, which you will need to know how it will fly. Many of us, and people in
the US market, use the older imperial units, but obviously you can convert
these to metric if you wish. So we have guidelines like "20 ounces per square
foot flies well".
Unfortunately, these guides only work for comparing aircraft of about the
same size. This is because if you take a design, say an Ugly Stik, and double
the wingspan (2 times), then the wing area is squared (4 times), but the
weight it can carry is cubed (8 times). This might seem illogical, but if you
double the chord (width) of a wing, the air flowing over the top is deflected to
double the height above the wing surface. Thus, doubling the wing chord
gives four times the lift.
This chart below was printed in RC Modeler magazine many years ago, and I
find it almost essential for my modelling use. With it, I am able to predict how
any size model aircraft will fly.
In its day, the series of Falcon aircraft was one of the most popular trainers
Relationship of Wing Area, Weight, and Power for average RC model aircraft
COX
BABE-BEE
.049 & TEE-DEE .020
COX
TEE-DEE
.010
1000
.02
COX MEDALLION
& BLACK WIDOW
.049
COX
TEE-DEE
.049
COX
PEE-WEE .020
.03
MUFFLER-EQUIPPED
.04
.06
.08
.09
.12
.15 .19 .23
.16
.24
.30
.32
.40
.48
.64
.60
.96
.80
1.28
AVERAGE
ENGINE
SIZE
ENGINE HP
SNR FALCON
800
1.92
DIRTY BIRDI
600
ER
ID
D
RE
WING AREA (SQUARE INCHES)
500
FALCON 56
E
W
PO
GL
NEW ERA III
ER
400
N
AI
TR
T
OR
N
ER
300
&
SP
TT
PA
Y
AV
HE
JNR FALCON
ACE PACER
Y
AV
O
TO
200
HE
150
100
10
15
20
30
40
50
WEIGHT (OUNCES)
60
80
100
150
200
I can further confirm that, due to generous sponsorships, we managed to
make this competition financially viable, and I would like to thank Mr Dean
Grobbelaar from Aerial Concepts for his very generous donation.
I also wish to thank our Special Interest Group chairman, Mr Herman Weber,
for his efforts and resolving issues at the Nationals in a very professional and
effective manner. I also extend my most sincere gratitude to Bob and Marietjie
Skinner who carried most of the responsibility for arranging the Nationals. I
have never seen any competition arranged with so much attention to detail.
As it is the first such competition for most of the Special Interest Groups, it
took lots of negotiation to try and keep everybody satisfied. Thank you very
much Bob and Marietjie, most of the success of this competition is due to your
hard work.
Chairman’s
Report to the
AGM
Marthinus Potgieter
The committee that is currently
serving, has entered the second
year of their term and is currently
planning a nomination and election
process for a new committee that
will start serving next year,
beginning June.
There are reports, photographs, and results published in Issue 2 of 2015 of
the SAMAA News, from all the participating Special Interest Groups, and the
organisers.
On 14 April 2015, I received the
resignation of one of our
management committee members,
Mr Mike Brews. Unfortunately
Mike's work responsibilities
changed and he had no other option
than to resign and focus on his
career. I would like to take this
opportunity to thank Mike for his valuable contribution and I hope that he will
see his way clear to making himself available in time to come to serve on the
SAMAA management committee.
The financial year end of the SAMAA was moved to 31 December every year
as voted and decided on at the last AGM in 2014. It was not the easiest task to
accomplish as there was not much time after the AGM to put all the
processes in place and also not the best cooperation from our auditors.
Thank you to Juanita and George who championed this process. Obviously
our Audited Financial Statements will reflect only the figures from March to
December 2014, and should be evaluated in that context.
I can also report that the financial status of our organisation is very healthy
even in these difficult economic times. This has put the organisation in a
position to market and promote itself.
There has been a delay in launching the new SAMAA website and I must
assure you that it is not due to a lack of trying. Bob and I have been busy
loading information onto the new website but we are waiting for the
programmer to add a hierarchy system in the information section. At the last
SAMAA Management meeting it was decided that despite this, we will launch
the site in the next two months and alter the information page once the
hierarchy has been added.
The committee undertook to update the SAMAA Manual of Procedures last
year but waited for the request of “Letters of Procedure” from ATNS before we
proceeded. We have still not received them and a decision was made to
proceed with the update and add the “Letters of Procedure” when they
become available. Interaction with the Aero Club of South Africa and the
Recreational Aviation Administration of SA takes place on a regular basis.
Since the last AGM we have requested feedback from members on whether
or not their contact details should be given to the Aero Club of South Africa so
they can receive information and news. We received no feedback
whatsoever from members and we might have to revisit this issue.
As many members might be aware, the signing into Law of Part 101 of the
Civil Aviation Act dealing with the Commercial Operation of Remote Piloted
Aircraft Systems, or more commonly known as Drones, took place. The Act
makes it very clear that it has no bearing on recreational and model aircraft
activities that are regulated under Part 94 of the act. The SAMAA
Management Committee also approved an interim Multi-rotor Proficiency
document on 23 June 2015 that will enable members to be tested and receive
one or more of three different multi-rotor proficiencies, and it also makes
provision for the appointment of multi-rotor instructors. I would like to thank
Gary McDonough who contributed significantly to the efforts of the Model
Helicopters South Africa Special Interest Group to have this document ready
for publication before 1 July.
During April this year our CIAM representative, Mr Johan Ehlers, attended
the annual CIAM (Commission for International Aeromodelling) Plenary
Meeting in Lausanne, Switzerland. He attended several of the meetings
hosted on specific request from our Special Interest Groups. I would like to
thank Johan for his endeavours, as I am aware that it is a tiring journey and
definitely not a holiday. His report is available to those interested.
Over the long weekend of 16 June 2015, the SAMAA hosted for the first time
in fourteen years, a Combined Power Nationals, at the PC Pelser Airport in
Klerksdorp. I was fortunate to attend some of the days and received lots of
positive feedback from contestants, judges, officials, and spectators. I can
report that it was a massive success with only a few very minor details that
need to be changed in the future. We hope to host the 2016 Combined Power
Nationals on the same weekend next year, but will have to confirm the venue.
In the weeks to come, we will have five teams leaving for overseas to
compete in separate world championships.
F3A RC Aerobatics.
Switzerland
F3C Helicopter Aerobatics.
Austria
F3K Gliders Hand Launch
Croatia
(Senior and Junior teams).
F3B Gliders Multi-Task.
The Netherlands
I wish all our members a safe journey and hope that they will be successful in
their respective disciplines. I would like to mention Roston Dugmore
especially, as he will be defending his F3A Junior World Champion title and
wish him all of the best.
I believe it is also appropriate to congratulate Ivan Olivier on his invitation to
judge at the F3A World Championship in Switzerland in August this year. This
is a huge honour, a compliment to the SAMAA and I believe the result of many
years of hard work and dedication. Well done, Ivan. (Unfortunately Ivan has
had to withdraw. He runs his own business and he has just landed a contract
which is financially very rewarding - Ed.)
Since the SAMAA has stopped publishing a printed newsletter, the SMC
recently discussed the possibility of publishing a printed SAMAA Year Book.
This will be in the format of a “glossy” coffee table book covering all aspects of
our sport. More information on cost needs to be obtained to make an informed
decision that will fit in with our budget.
Over the last couple of months I have sensed a very positive attitude from
most members I have interacted with. I was privileged to visit two clubs in the
Eastern Cape last year December, and was pleasantly surprised by the
professionalism in all aspects of club management that I came across. Also,
thank you to these clubs for their warm welcome and hospitality. I have
reported in the SAMAA news about these visits.
It goes without saying that the majority of the SAMAA is made up of what are
referred to as “Sunday Flyers” who only participate in aeromodelling for
recreational non-competitive purposes. I would like to thank all these
members for their loyalty and positive contribution that most make to our
wonderful organisation.
The SAMAA Management Committee is currently investigating the possibility
of appointing an assistant to Mr Bob Skinner, our General Manager, who will
relieve him of the day-to-day administration of the SAMAA and enable him to
interact more with our clubs and regular members.
One of my concerns, is that just over 55% of our total membership carries
proficiency. I would like to encourage all our members to obtain a proficiency
rating in their field of activity, as it can only be to your own benefit and make
you a safer pilot. If any member experiences any difficulty in arranging such
testing, please contact the SAMAA office and we can assist in arranging
instructors or judges to perform these tests. Some clubs have in the past
hosted proficiency days where three or four clubs join together once a year
and perform all the tests required.
I would like to thank all my fellow Management Committee members for their
efforts and dedication. We do not always agree on all matters, but I believe
that through the process of debate and negotiation, in most cases we reach
the best solution for our organisation.
I look forward to the next twelve months of my term, and hope that we will
reach the targets that we have set.
Thank you to all the members of the SAMAA who have made the effort to
attend this AGM – it is highly appreciated. This is the forum to debate issues
in a positive and proactive manner, and I appreciate your interest, attendance
and support.
Last, but not least, thank you very much to Allen Fraser of Frasers Radio
Control Models, and Juanita Smith of Al’s Hobbies for the sponsorship of the
snacks and drinks served at this AGM. Your contribution is highly
appreciated.
From the office
for members
of the S AM A A
Management
Committee
Bob Skinner
This GM report was delivered at the
2015 Annual General Meeting of the
SAMAA, on Thursday 25th June 2015.
It briefly covers the activities of the
S A M A A o ff i c e a n d t h e g e n e r a l
manager, from October 2014 to June
2015, mainly due to the change in the
SAMAA financial year end (to endDecember 2014).
As always, it was a very busy period in
your office, with most model aviation
issues being handled on a regular
basis: memberships, events,
proficiencies, clubs, insurance, FAI, airspace, newsletter, Aero
Club/RAASA/CAA, SIGs, and I have to once more include our much-loved
post office. There have been numerous queries from members who have not
received their membership cards, and unfortunately this is totally beyond our
control…and beyond the control of the government!
Membership renewals and new memberships are processed quickly and
efficiently. Our membership count is in the region of 3 800. Information is
critical to good communication, and members are urged to log-on to the
membership programme to update their information.
www.samaa.co.za/ (Edit own details)
Proficiency-testing appears to be gaining momentum, and all clubs are
encouraged to get actively involved in improving the skill level of all model
aircraft pilots.
Many clubs and groups have over the reporting period, arranged events like
fly-ins, airshows, and competitions. Applications for permits are managed inhouse, and in conjunction with RAASA, where shared use of airspace is
involved for Special Air Events.
The SAMAA arranged a very successful Combined Power Nationals a few
weeks ago. My personal thanks to Marthinus Potgieter, who continues to
support the SAMAA with his own resources and logistics. Thanks also to
Herman Weber who was the event director, and managed to herd the cats
most efficiently!
Johan Ehlers continues to efficiently look after our CIAM/FAI matters, and the
SAMAA management team has spent many hours on airspace issues. We
have an obligation to members, to ensure that our airspace is protected and
managed, and that members may continue to fly safely at our SAMAAregistered clubs. The production of SAMAA News landed on my desk, but
this is only a temporary measure, until a permanent editor is identified and
appointed.
Our relationship with the Aero Club and RAASA continues on a good footing,
and minor issues are handled expediently. The SAMAA was involved in the
Aero Club Airweek, but the concept needs some attention, since it currently
focuses only on current Aero Club members. Many of the SAMAAs Special
Interest Groups have seen a drop in activity, and the concept of a combined
Nats is destined to stay for the foreseeable future.
The SAMAA historic preservation project is gaining momentum, and some of
the items are on display here tonight. Members are encouraged to donate
historically significant articles to the SAMAA, so that we may preserve the
history of our proud Association. This could be model aircraft, magazines,
newsletters, photographs, CDs, or other items of historical significance. The
Association was constituted in 1936, but there are huge gaps where
historical facts are simply not available to us.
It is almost time for the election of members to the next SAMAA Management
Committee. This election process will start in the next few weeks, and the
committee is currently investigating means of electronic voting, since the
post office has proven to be a totally unreliable method of communication.
Watch your SAMAA News for the announcement, and the first step, that of
nomination for five elected committee positions.
The nomination and voting procedure in the current system calls for postal
votes. Due to the problems experienced at the SA Post Office, it has been
requested that the postal votes are replaced with an e-mail vote. This
procedure is rather long-winded so we have written this summary of how the
procedure will work.
E-MAIL VOTING PROCEDURE.
1.
2.
3.
4.
Nominations.
Voting.
Counting and declaration of results.
Ratification.
1. Nominations
Nominations will be called for in the SAMAA News, and a form will be
available requesting names of nominees. Nominees will be required to sign
acceptance of the proposal, and must be eligible for the position. The
nomination form will contain the return e-mail address and will be that of the
SAMAA General Manager, or the fax number of the SAMAA office. Return on
or before the published date.
2. Voting
When the nomination forms are returned and vetted, these names will be
published in a SAMAA newsletter along with their CV's, requesting every
SAMAA member to vote for the nominated members as listed. You may vote
for up to five members as per the published form and return this via e-mail to
the e-mail address or fax number of the SAMAA auditors as indicated on the
form. NB. DO NOT RETURN TO SAMAA!
3. Counting
The auditors will verify the votes and ensure the members are current and in
good standing. They will supply the election co-ordinator, to be nominated by
the SMC, of the vote count.
4. Ratification
The results of the vote count will be announced at the next AGM, and along
with any floor votes, will decide on the next SMC committee members.
There we have it – sweet and simple – but it will only work and succeed if you,
the member, do your job properly by voting, voting timeously, return the forms
to the correct e-mail address or fax number, and filling in the forms correctly.
The SAMAA is for your benefit, works for you, for your hobby and your
enjoyment; so protect, participate, and foster it.
THE FUTURE – SAMAA.
In closing, please get involved in your own way, and within your club, to
promote the SAMAA, and its activities. We hope to grow the Association to
become even stronger. The management committee members are
enthusiastic and committed, and we are always ready to serve the
membership, but they cannot possible cover all the bases. If you have a
problem, or know of someone else that has a problem, pick up the phone and
call me, or any of the SAMAA management committee members, and let's
find a solution, together.
This is our Association, and we ought to be proud of it, and what we have
achieved. Talented managers often use the phrase: “Good enough never is”.
Let's all aspire to this mantra.
During the 2015 Annual General Meeting of the SAMAA, several of the historical items destined for
the museum, were exhibited. Can the older members identify the Robbie Rowe Wakefield model?
The South African Model Aircraft Association
Nomination of members
for the Management Committee
The SAMAA herewith calls for the nominations from/of Association members,
to serve on the SAMAA Management Committee during the term of office 2016 and 2017.
In terms of Clauses 9 and 10 of the Constitution, and the election process approved by the auditors,
nominations are called for five (5) management committee members.
To be valid, each nomination form must be completed, signed, and returned as per the following process:
a.
b.
c.
d.
The name, SAMAA membership number, address, and signature of the PROPOSER
The name, SAMAA membership number, address, and signature of acceptance/consent of the NOMINEE
The name, SAMAA membership number, address, and signature of a SECONDER
The completed nomination forms must be sent to:
“Nominations for management committee”, PO Box 7116, Bonaero Park 1622
or
Faxed to 086-607-8733 (fax to e-mail)
or
E-mailed to [email protected]
or
Hand-delivered to the SAMAA General Manager, office 24, Building R4, Denel Technical Academy,
131 Atlas Road, Bonaero Park.
The completed nomination forms must arrive on, or before 30 October 2015.
e.
NOMINATION FORM
I,
the PROPOSER, being a member of the SAMAA in good standing, hereby nominate
(name of the nominee)
Signed
to stand for the SAMAA Management Committee.
SAMAA number
Address
I,
the NOMINEE, being a member of the SAMAA in good standing, do hereby agree, if
elected, to serve on the SAMAA Management Committee.
Signed
SAMAA number
Address
I,
this proposal.
the SECONDANT, being a member of the SAMAA in good standing, hereby second
Signed
SAMAA number
Address
Nominees must submit an introduction of themselves, which must be no longer than 100 words for publication in the
SAMAA News. This is to introduce yourself to the members who will be voting for the candidates. This introduction
may be edited if longer than the required 100 words, to fit into the available space of the SAMAA News.
1. A brief CV
2. An election manifest/promise
3. Reasons why he should be elected
2015 Art Adamisin Cup
Since last year we have seen quite a few new faces that are interested in
control-line and we actually had a possible seven entries in novice stunt.
Unfortunately things happened that prevented many from participating. I am
however happy to report that after this competition, the positive vibes have
already spread rapidly, and I believe that the Nats in Klerksdorp will have a
good novice entry.
Last year in October we were invited to go and fly in Ventersdorp at the farm of
Theuns Hattingh, and even though we were totally blown out by horrendous
wind, we had a wonderful visit and were able to share a lot of our knowledge
and experience with the Ventersdorp guys.
Theuns entered novice stunt but unfortunately broke his model in Friday's
practice session due to strong wind. It seems like the wind follows Theuns!
That was a pity because it would have been good to see Theuns flying in the
event on Saturday. In any event it was good to have Theuns, his family and
friends with us. Baie dankie Theuns dat julle ons besoek het!
by Keith Renecle
The windy conditions did not deter this enthusiastic group of control line fliers at the Barnstormers.
The 2015 AA Cup took place once again at Barnstormers on the 18th and
19th of April, and all I have to say up front is that control-line is alive and well!
What a successful week-end we had with eight entries in Expert stunt and
two in Novice stunt. The weather threatened to be really bad with cold and
strong wind but on Saturday the wind was flyable for three rounds. It was
however, hard work for the pilots because the wind blew over the clubhouse
creating lots of turbulence on the tar circle to make life for the pilots rather
challenging.
Most of our entries came from Gauteng, but we also had two entries from the
Eastern Cape. Colin Paine came up here from Knysna with his take-apart
model with a fuselage and tail feathers borrowed from the venerable R/C
Ugly Stik. It flew quite well down at sea level but unfortunately was a little
heavy for our thin air. I had managed to build a basic stunt trainer for a .40 size
electric system and Colin used that to fly in the competition. I am notorious for
arriving at competitions with new models with wet paint, but this time I beat
The novice event was flown on our grass circle and it is slightly out of the
turbulence so it is a better deal for the novice guys. The grass field is also a
little softer in the case of any prangs!
The AA Cup is named in honour of Arthur Adamisin, or “Big Art”, a renowned
C/L stunt personality and international judge from the USA who came out to
South Africa in 1997 to help us improve our stunt flying and also judging
standards. This was a giant leap forward for us at the time, so we decided to
name one of our team trial events for choosing the team to world
championships after him. This was planned to be held later in the year but C/L
was invited to join in the fun at the combined power Nats in June in
Klerksdorp, so we moved the event forward to April and also added a novice
stunt category.
Ventersdorp visitors relaxing at the AA Cup, while Peter Locke prepares his stunter for a flight.
the system...there was no paint! That is the neat thing about electric power,
the wood does not need any paint because there is zero goo from the engine!
is necessary for flying this very difficult stunt pattern. I have watched his
development since he started and Theo has taken a giant leap forward in the
last few months. He has also done a lot of ground work on building and
understanding engines, and that is just so good to see. For the long term
future of aeromodelling we really need “modellers” in the true sense of the
word. Ready to fly and ARF models are all fine and well, but the hobby/sport
really needs more true modellers to survive. We are very proud of what Theo
has achieved!
Justin flew the beginner pattern in the novice event, and this allows the pilot to
choose which maneuvers they want to perform. They can also choose very
basic maneuvers like two standard wing-overs instead of the reverse wingover for example. It is a good system and allows a pilot with very basic skills to
enter competitions and have some fun, so hopefully we will see many more
entries in this event soon.
Colin Paine’s hybrid, with Ugly Stik tailfeathers.
Peter Locke who is a regular entry from Grahamstown, came up here with
another stunning model in his 40-Watt series. The 40-Watt 3 really topped the
previous models from Peter who has the vast building experience and ability
to produce such lightweight and pretty models.
The furthest travelled visitor this year was Charlie Johnson from San Diego in
the USA. Charlie is a very experienced C/L guy that helped us a great deal
through the years especially in combat. In past years he also brought us
many good C/L engines and other hard to get stuff, so we really appreciated
seeing Charlie again at this event.
We had two judges Bob Skinner and John Withers arranged for the weekend, but unfortunately John got the dreaded lurgy and could not make it. I
know that John always enjoys judging C/L so it was sad for us not to have him
with us. We did however manage well in the capable hands of Judge Skinner,
so thanks very much to Bob for sitting out there in the chilly wind while we
were all playing with our toys!
The flying was intense and after round one, junior world F3A R/C pattern
champion Roston Dugmore was leading the scores, with myself 2nd and
young Warren Smith in 3rd place. These kids just have no fear even in these
rough, bumpy conditions. With a level flight height of 1.5 metres above the tar
surface, this makes for precision flying ability and good nerves. Warren is
also a very good R/C pilot, and it just shows that it does not matter whether it
is a box with sticks on it, or a handle with two lines...a good pilot is a good pilot!
I had to work really hard to beat these two kids by a small margin, so well done
to Rostie and Warren. We are extremely proud of what they achieved in such
difficult conditions.
Percy Attfield flew his Centurion XL into fourth place, so well done to Percy.
His big Centurion which is based on the Paul Walker Impact design, had no
shortage of power with his big MVVS electric motor running on a 5-cell LiPo
battery pack. Peter Locke placed 5th with his 40-Watt 3 model, and Colin
Paine followed closely behind in 6th place. Len Smith in 7th place was flying a
version of the 40-Watt 2 built by his dad Eric, and he bought Peter Locke's 40Watt 2, so Len will now have a well sorted out model to fly in the future.
One of our top regular fliers, Nic van der Westhuizen, flew a Nobler with a Fox
.35 in it into 8th place. This did not behave that well, and unfortunately, it
pranged in the bad conditions on Sunday. That is never a thing that you want
to see happening, so tough luck to Nic, and we look forward to seeing your
Kestrel soon with the Super Tigre .46 in it.
We flew three good rounds on Saturday, and Sunday morning looked
promising for the final two rounds. After the first round however the wind
came up with gusts over the max 9 metres per second or around 33 km/h; we
decided to call it a day. The results are the best three rounds out of four.
In the novice stunt event, the entries were Theo Kleynhans, and Justin Lees.
Justin is another very good R/C pilot and enjoys a bit of C/L with Rostie now
and then, so thanks to Justin for joining in the fun. Theo has been working
very hard for the last few years on his building and flying ability, and as the
results show, his hard work is now paying off. He has learnt to fly these
models well and develop that special feeling for the manoeuvre shapes that
Rostie Dugmore doing what he does best, with support from Justin Lees.
It was interesting to see that this year, seven of the eight expert models were
electric-powered and there were zero problems during the week-end. I
personally still enjoy using engines, but in a competition it is hard to beat the
reliability and predictable motor run of e-power. A good solid engine run is
about 80% of what contributes to a good stunt flight, and once you have the
understanding of e-power, it is hard to beat.
In conclusion, a big thank you to all that helped to make this competition a
success. As always, thanks to Percy Attfield for much of the background work
and the final speech and prize giving. To Nic van der Westhuizen for his help
and support in general and also for the safety tests each day. To Theo
Kleynhans for his help and support each week-end and during the
competition. In fact all of the guys present offered help whenever there was
something to do, and that makes these events very special. One more
special thank you goes to my biggest supporter, my wife Bokkie who helped
with many things leading up to the event and then for her work in organizing
and preparing food for the Saturday evening braai and also for doing most of
the tabulating on both days. Everyone really appreciates what you do for C/L!
Now this was a good warm-up for the coming Nats in June, so let's make the
Nats a great event. We look forward to seeing many more entries there!
Keith Renecle accepting the AA Cup trophy from
Percy Attfield and Marietjie Skinner.
Ever so seriaaaas! Bob Skinner assessing an
aerobatic flight.
Results
2015 Art Adamisin Cup for control line aerobatics. Barnstormers.
Pl.
Name
Rd 1
Rd 4
Total
Theo Kleynhans
Justin Lees
300.0
92.0
Rd 2
Novice Stunt
371.0
140.0
Rd 3
1.
2.
354.5
106.0
328.0
127.5
1053.00
373.50
1.
2.
3.
4.
5.
6.
7.
Keith Renecle
Roston Dugmore
Warren Smith
Percy Attfield
Peter Locke
Colin Paine
Len Smith
850.0
864.0
821.0
776.5
746.5
650.0
715.5
Expert Stunt
918.0
865.0
837.5
786.0
781.0
752.0
773.0
924.5
912.0
898.5
771.0
749.5
767.5
598.0
925.0
911.0
898.0
723.0
725.0
746.0
765.5
2767.50
2688.00
2634.00
2333.50
2277.00
2265.50
2254.00
Theo Kleynhans receiving the first-place trophy in Novice Stunt.
Bulties
2015
by Boet Denysschen
Photos by Stan Fincham
Late afternoon rest for these aeries, after a busy day’s flying.
The 2015 Bultfontein Fly-in took place from the 2nd to 5th July at the
municipal Airport in Bultfontein. We travelled down on Wednesday, arrived at
the field around 14:00 and were met by a group of pilots from Pretoria. The
weather was awesome, with a slight south-westerly wind, but temperatures
around 24 degrees.
A special thanks to all pilots attending, and most important of all a special
thanks to our sponsors of the event.
AMT
Marius Lensing
Aerial Concepts
Denny's Electrical
Sanjay Kana
Jets-R-Us
Johan Powell
Tobie Kock
TopFlyte Hobbies
Pierre Fouche
Mr Anonymous
George vd Burg
The afternoon was used for setting out the pit area, safety barriers as well as
the starting area. Two large shade nets were secured on the ground to serve
as start up area. This just helps to contain the dry grass blowing around
during start up. Two hangars were made available at night for storage of
aircraft. A group of pilots from Welkom and Bloem decided to camp at the
field in a caravan and tents. The clubhouse facilities have electricity, toilets,
as well as hot water showers.
Around 50 percent of the pre-registered pilots arrived on Thursday and the
balance on Friday. A total of 49 pilots pre-entered and another seven pilots
arrived to fly over the weekend. Only three of the pre-registered pilots did not
arrive for the event.
Jacques Alberts and Wesley
Denysschen.
Leo van Niel relaxing.
Junita and Chris Venter (Welkom).
A count of aircraft was done around 12:00 on Saturday, with 120 aircraft
present. Pilots who travelled the furthest were the guys from Upington, with
two pilots using their full-size planes to fly in to Bulties.
The runway at Bultfontein runs north/south with the prevailing take-off
direction from left to right. The sun causes a slight discomfort in the afternoon
as it sets directly in front of you, although this does not stop pilots from
flying... you just adjust the height of your flight path.
All types of aircraft were flown, ranging from foamies, large scale, jets, and
some helis. Only two aircraft were damaged throughout the weekend. On
Saturday we had a good turnout of public coming to watch what was
happening and enjoying a day out in the sun with good food catered by the
local school on Friday and Saturday. They make the most awesome
breakfast, to die for.
Dieter Lettau flying his MB339 and Mustang, and Corrie Coetzee flying an
Aviation design Scorpion and Corsair thrilled the crowds with their formation
flying over the weekend. Saturday evening all pilots, wives, girlfriends, and
helpers got together in the Bultfontein Hotel for a sit-down supper where the
most awesome steaks were served, they were like butter in your mouth. So,
never under estimate the local hotels. This event was also used for handing
out of a few prizes to a few lucky pilots. A cap, beanie, branded beer glass, a
frequency peg, and dinner were given to all pilots as part of their entry.
ViperJet of Theo Potgieter on touch-down.
Close up of the cockpit detail of Theo Potgieter’s Hawk.
Isn’t it great to have your home comforts/building board/workshop right on the flying field? This fullyfitted trailer is almost a necessity if you are required to cart the F-5 E Tiger around.
Avanti XXL belongs to Alex Kuys.
Antic Bipe doing a barnstorming run down the Bultfontein runway. Flown by Vic Pretorius.
ZU-JET of Tobie Kock making best use of the Bultfontein runway.
Big Decathlon thrilled spectators with aerobatics and smoke. Flown by Jacques Alberts.
A Boet Denysschen Nog-A-Roo getting checked out before take-off.
Wing bags & Tx cases
Protective wing bags made for all types of wings. Made
from waterproof canvas material, with zip, carry handle,
wing spar pockets, and pocket for inter-plane struts if
for bi-plane.
Nicely-decorated Eurosport by Boet Denysschen.
Chengdu J-10A by Tobie Kock.
BAE Hawk, flown by Theo Potgieter.
Protective waterproof Tx carry case to protect your
aluminium transmitter case.
Contact Paula on 082-456-2420
or [email protected]
Dieter Lettau’s Aermacchi MB339 does a dirty fly-by.
F3C Model Helicopter competition
flying in perspective.
to the level where our pilots get into the fly-offs or into the top positions in the
F3C W/C events. This possibly is the same for most of the other model flying
disciplines in our country.
The only way our pilots can work their way up the ladder is to get out of the rut
where we fly in isolation, and where we are far removed from the conditions at
which the W/C events take place. Somehow we need to either simulate the
conditions, or find sites where the conditions are similar for our flying
activities – typically we will have to fly more competitions at low altitude etc.
This also means that the competing pilots need to do more extensive testing
and flying at these conditions. Possibly our pilots need to participate in more
international competitions to break the isolation.
by Johan Sieling
If we do not create a more professional and sponsored environment for our
pilots we will never get there, because of the costs and time needed to get
properly prepared to be really competitive in the international W/C events –
we are fighting a lost battle if we do not make the necessary efforts to make
the changes required.
Hiroki Ito of Japan regained his world championship title in 2015, with some superb flying.
This report on the results of the past FAI-F3C Model Helicopter World
Championships is primarily aimed at giving a perspective on the results
achieved by the South African pilots that participated in this years' F3C World
Championship event in Austria.
The competition took place from 02 July 2015 to 12 July 2015 in a small
village Klopeinersee in Austria. The competition organisation was excellent,
and due to the low number of entries, only one flight-line was utilised this time
round. This meant that all the rounds were flown in front of one set of five
judges on the exact same flight line.
The weather conditions were good but then also quite harsh at the same time.
The day-time temperatures were well into the 30deg.C range and the
humidity was also quite high, sitting at around 60% and higher most of the
time. Then, all of this was at an elevation of around 400 metres above sea
level. This was also the first F3C W/C where the wind conditions were very
favourable most of the time, and the wind therefore did not have an effect on
the results throughout the competition. The changes from the fly-bar to the
fly-bar-less three-axis gyro systems at this W/C basically made the
competition more tight and close, which can be seen in the overall results
compared to the previous events.
Could a South African hold this F3C trophy and have an FAI gold medal around his neck? Johan
Sieling thinks we need a more professional approach to our activities, in all competitive disciplines.
Everyone who has ever represented South Africa, will know how important it is to have the finances
to be able to prepare yourself, to have the right equipment, to have the experience, and to have had
the exposure. Of course you must have the talent, and more importantly, the desire to succeed.
Visit
www.fai-heli-worlds2015.at/
The competition was won by Hiroki Ito of Japan with a raw score of 86.61% for
the four preliminary rounds, and a final score of 85.36% after the three fly-off
rounds. In second place was the former world champion Ennio Graber with a
raw score of 82.83% for the four preliminary rounds, and a final score of
82.83% after the three fly-off rounds. This proves how competitive and close
the final scores really were this year. Then, our best pilot Arney Sieling was
placed 22nd overall with a final raw score of 72% after the four preliminary
rounds which is 84.1% of the score obtained by the winning pilot. Our second
pilot, Bryan Currie was placed 40th overall with a final raw score of 64.72%
after the four preliminary rounds, which is 74.75% of the score obtained by
the winning pilot. Only the top 15 pilots go through to the final fly-off rounds.
The achievements of both our pilots were good and typically as expected.
They achieved very similar scores at the W/C to those they get in the local
flying competitions which thus proves that the standard of our local
competitions and judging is on par with that of the international W/C
competition.
The question that one now asks is what do our pilots have to do to reach the
fly-offs? Well, to put it into other words, is why didn't our pilots get through to
the fly-off rounds? To answer this question one has to take into account the
differences between the preparations of our pilots, versus that of the top pilots
that do get into the fly-offs.
Firstly, our pilots live and fly in their own little world where they do all their
flying at altitudes far above 400 metres (typically at around 1600m) and they
have very little exposure to the international flying conditions and
environment. The European pilots have regular competitions where they fly
against most of the top pilots, in front of the same judges that are used at the
W/C events – lots of exposure to the real conditions and competition
environment. Then one also has to take into account that our pilots are
basically amateurs and have very little sponsorship backing. Typically, at
least the top ten pilots at the W/C events are basically professional pilots
which are heavily sponsored by the various manufacturers.
Basically, we are very naïve in our thinking if we expect our pilots to perform at
a level where they could reach the fly-offs or possibly get a top placing in the
overall results – if we do not change our approach to the model flying sport,
we will never make it! Basically, both the pilots and the controlling bodies will
have to wake up if they ever expect the results of our participants to improve
to view the full scores of the F3C/F3N World Championships.
Tel + 011-545-1000. Fax 011-545-1465. e-mail [email protected]
Members may also wish to visit John Gore’s site on
pertinent to RPAS operations.
www.caa.co.za
www.safedrone.co.za. It contains valuable information, and answers many questions that are
The S AM A A Activity Calendar
Event
Contact
Telephone
Aug
30
30
Gauteng TBA
Umbila Radio Fl
F5J Electric Comp
Gauteng Monthly
Ivan Williams
Matthys Botha
083-263-7889
073-895-9909
September 2015
Date
5
12-13
12
13
13
13
19-20
20
23-27
24-27
27
Rand MAC
Boshoek Fly-in
Barnstormers
Warbirds
Helderberg RF
Gauteng TBA
Barnstormers
Warthog Radio Fl
Oudtshoorn
Witsieshoek
Howick MFC
Pylon Racing
Boshoek, Rustenburg
SA Masters Control Line
Barnstormers
W Cape Aerobatic Monthly
Highveld Thermal League 3
Gauteng Aerobatic Champs
Series Scale Round 3
Scale 2015
Slope Fly-In
KZN Aerobatic Monthly
Arrie Schoeman
Sakkie vd Bank
Keith Renecle
Heinie Keyser
Stuart Nix
Herman Weber
Matthys Botha
Koos Pretorius
Morné Nortier
Herman Weber
John Dorse
082-789-9500
082-929-9314
083-415-1409
082-210-4389
082-855-4920
082-453-8551
073-895-9909
082-928-0368
082-890-6601
082-453-8551
082-824-8589
3
4
11
17-18
18
18
24-26
25
25
29-31
31
Rosslyn AM
Gauteng TBA
Boland MAC
TBA
Gauteng TBA
Helderberg RF
Jan Kempdorp
JOMAC
Tygerberg MFC
NASA, Springbok
Stellenbosch
Club Aerobatics
F3J Team Trial
Scale Day
SA Aerobatic Masters
F3K HLG League
Fly & Braai
Greg Casson Memorial
Vintage Fly-In No. 301
Golden Oldies
Great NASAFI Fly-in
Glider Day
V Zyl Koegelenberg 083-659-4381
Herman Weber
082-453-8551
Werner Mayer
084-513-1375
Clinton Carter-Brown 083-630-2636
Herman Weber
082-453-8551
Michael Basson
072-266-7199
Boet Denysschen 082-449-4623
Colin Matthysen
082-697-5019
Aubrey Smith
061-451-0245
v Zyl Koegelenberg 083-659-4381
Nic van Rensburg 082-700-1856
1
7
7-8
8
15
22
28
28-29
Nationwide
Gauteng TBA
Barnstormers
Welkom MAC
Kingsburgh MAC
Tygerberg MFC
Rand Model AC
Rand Model AC
Hermanus
Gliding Postals
F5J Electric Comp
Club Aerobatics
2015 Fun Fly Masters
KZN Aerobatic Monthly
Heli Day
Pylon Racing
AFC Slope Fly-in
Herman Weber
Ivan Williams
V Zyl Koegelenberg
Anton van Wyk
Neil Allen
Aubrey Smith
Colin Matthysen
Arrie Schoeman
Andrew Basson
082-453-8551
083-263-7889
083-659-4381
082-554-2390
073-231-4141
061-451-0245
082-697-5019
082-789-9500
082-901-9259
6
6
12-13
16
20
24 Jan
Gauteng TBA
Tygerberg MFC
Gauteng TBA
Peninsula RF
Barnstormers
Benoni Radio Fl
Highveld Thermal League 4
Scale Day
Final F3K League (Sleepover)
Birthday Bash
Vintage Fly-in No. 304
Herman Weber
Aubrey Smith
Herman Weber
Francois Viljoen
Colin Matthysen
Colin Matthysen
082-453-8551
061-451-0245
082-453-8551
082-955-0458
082-697-5019
082-697-5019
Dec 2015
November 2015
Club/Site
Oct 2015
To advertise your events in SAMAA News (club event, local, air show, fly-in, provincial
competition, national competition, team-trials, etc.) is free of charge. Promote your club,
group, or SIG and its activities. Send details to [email protected]
NASAFI Fly-in
@Springbok!
& Nama-Gôi
Festival
1
3
29 Oct5
1
0
2
Contact
van Zyl Koegelenberg
083-659-4381
[email protected] www.facebook.com/groups/442772795766238/
VISIT
WWW.CANGOFLYINGCLUB.CO.ZA/
SAMAA management committee
Marthinus Potgieter
George Sly
Johan Sieling
Ludwig Steyn
Herman Weber
Juanita Smith
Vacant
Vacant
Chairman
Vice-chairman
Secretary/Compliance
Development
Special Interest Groups
Treasurer
Club Representative
Regions Representative
[email protected]
[email protected]
[email protected]
[email protected]
[email protected]
[email protected]
to be appointed
to be appointed
082-377-6493
083-560-7545
082-898-8810
082-951-1874
082-453-8551
083-630-8975
Johan Ehlers
Vacant
CIAM Representative
Newsletter editor
[email protected]
to be appointed
082-804-1120
Administration & Office
PO Box 7116, Bonaero Park 1622. Tel/fax 011-973-3679. Fax 086-607-8733. Office 24, Building
R4, Denel Technical Academy, 131 Atlas Road (Denel North entry), Bonaero Park.
GPS Coordinates: S26 08 41.80 E028 15 59.04 (co-ords for main entrance to building R4)
Bob Skinner General Manager. [email protected] 011-973-3679, 083-283-1681.
Special Interest Groups (SIGs)
Keith Renecle Control Line Association of SA (CLASA) [email protected] 083-415-1409
Clinton Carter-Brown Model Aerobatics (MAASA). [email protected] 083-630-0626
Ivor Fletcher Model Gliding Association (MGA). [email protected] 083-321-7777
Wessel Vosloo Model Helicopters SA (MHSA). [email protected] 082-806-7686
Arrie Schoeman South African Miniature Pylon Racing Association (SAMPRA).
[email protected] 082-789-9500
Koos Pretorius Nat Ass Scale Aeromod. (NASA) [email protected] 0829280368
Zane Mannell SA Model Jet Association (SAMJA) [email protected] 082-827-8410
Gavin Walton Large Scale Aerobatics (LSA) [email protected] 083-408-4296
Anton van Wyk National Model Fun Fly Ass. (NMFFA) [email protected] 082-554-2390
To join the SAMAA: Request application form 011-973-3679. Visit www.samaa.org.za for MS
Word form, under “Membership - How to join”. On-line application from www.samaa.co.za. Or
submit details by e-mail: name, ID, address, tel, fax, cell, club, to: [email protected]
Subscription fees
From 1 April 2014 to 31 March 2016
• Regular/adult members (18 to 60 years of age)
R360
• Junior members (18 & younger. Students over 18 considered to be adults)
R200
• Senior Citizens/Retirees (60 years and older)
R240
Payment by internet (EFT), or cheque. SAMAA current a/c 1605 126 772 at Nedbank, Menlyn
Pretoria, code 1605 4500. Use clear reference of name/ surname, and membership number if
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Change of address: www.samaa.co.za and sign in with your log-in and password. No log-in
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programme. No internet? Contact the SAMAA office on 011-973-3679 to change your address.
news
SAMAA News publication, material, advertising
SAMAA News is produced in-house until the position of editor is advertised and filled. The
SAMAA general manager has been tasked to edit, produce, and distribute SAMAA News.
[email protected]. PO Box 7116, Bonaero Park 1622. Tel 011-973-3679.
Fax 086-607-8733.
The views expressed in SAMAA News, and the advertisements placed, do not necessarily
represent the views of the SAMAA, or its management committee. These are published for the
interest and comments of our members, and are not specifically endorsed, or verified.
Submission of material: The closing dates for submission of material: 20 February (to appear
20 March), 20 April (to appear 20 May), 20 June, 20 August, 20 October, 20 December.
Photographs (conventional & electronic), are welcome. Long articles must be computergenerated, and must be in either MS Word, or editable text. Limit articles to 1 000 words - which
is about a page-and-a-half in SAMAA News. You may e-mail your contributions, including
graphics and pictures to: [email protected]. Ensure that captions accompany all
pictures, and that the pictures are of reasonable resolution, not e-mail resolution.
To advertise: Contact the SAMAA office. You must supply finished artwork in JPG format, to at
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SAMAA News advertising rate card
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Quarter page
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Your Local Dealer advert, per insertion
Swops & Smalls, for a reasonable number of
items advertised (call SAMAA office for more details)
Full-colour
R2 100
R1 200
R700
R400
R100
R100
Protecting and serving your interests
The SAMAA needs your help, to ensure that your rights and privileges are protected. Through the
SAMAA, its Special Interest Groups, and numerous registered clubs, you can experience the
protection of your rights, and enjoy the real benefits in all aspects of model aviation.
• Advice
On building, flying, competition, airshow planning, club layouts, displays, special
air events, competition, illegal flying, etc.
• Clubs
Enjoyment of your activity in a group context. All SAMAA clubs are approved and
registered with the SAMAA, RAASA, and Civil Aviation.
• Insurance
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member-to-member cover).
• Proficiencies
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• Guidelines
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• SAMAA News To inform, educate, advise. Your mouthpiece. Great promotional value.
• Rules
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• Web pages
Good aeromodelling content, great links, regular updates, BLOG.
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• Representation The SIGs represent all competitive branches of aeromodelling.
• Affiliations
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Also to other institutions (RAASA, SAAF, Denel).
• Frequencies
Protection by ICASA of frequencies in spectrum allocated to R/C.
• Airspace
Manage airspace at registered sites, through the CAA and RAASA. SAMAA is the
only CAA-approved Aviation Recreation Organisation (ARO) for aeromodelling.
• CIAM
Direct link with CIAM (Commission for International Aeromodelling). Governs
all world-wide competitive activities, and records.
These are just a few of the services that the SAMAA is able to offer its members. Benefit from these
services, and let our combined membership add to the voice and strength of SAMAA.
Get a non-member to join today, and let’s make SAMAA stronger!
Contents of Issue 2 of 2015
news
Two Oceans Slope Soarers Aerobatics event 2015
Lime Acres Fly-in
Sound systems for RC planes
Langebaan visit
African 3D Heli Masters in the Western Cape
An essential chart for RC modellers
SAMAA Chairman’s Report to the 2015 AGM
From the office
Election for members of the SAMAA Management Committee
Nomination form for election of SMC members
Art Adamisin Cup Control Line Stunt event
Bultfontein Fly-in
F3C Model helicopter competition flying perspective
Important safety information for RPAS private operation
Activity Calendar and event adverts
SAMAA information details, management committee, SIGs, etc
Your Local Dealer adverts
1, 2
3
4
5
6-7
8
9
10
10
11
12-13
15-16
17
18
19
20
21
Your Local Dealer
Welkom
Country wide
Somerset West
Ermelo
Model Aviation
Sole agent
for ASP
Glow Engines
Danie: 083-501-8756
[email protected]
www.aspaviation.co.za
Chris Venter 082-808-1600
[email protected] www.rct4b.co.za
Boksburg South
Weltevreden Park
Shop 4
Parkdene Centre
Lancaster Road
S26 14 08 E028 15 11
Tel. 011 892 1084
011-026-3313
Alan and Juanita Smith
www.alshobbies.co.za [email protected]
Springfield, Durban
ould
This cadvert...
ur
*
be yo r R100
foper insertion)
Recognised as an excellent hobby shop
by SAMAA members!
Shop 10, Hillfox Power Centre
t011-475-8640. f011-675-0797
(*
[email protected]
Shelly Beach Margate
HOBBIES
Shop 115
Est.1984
The Home Centre
cnr Umgeni Rd & Ilala Ave, Springfield, Durban
[email protected]
www.denkit.co.za
HOBBIES
Shop 108
Est.1984
Entrance 4
Shelly Centre, Shelly Beach, KwaZulu Natal
[email protected]
www.denkit.co.za
Tel 031 263 2507 Fax 031 263 2964
Tel 087 805 8842
Tel 039 315 1640 Fax 039 315 7732
Tel 087 805 8844
Kelvin
Pinetown
Kempton Park
041 365 1371 082 651 8665
fax
041 368 7544 [email protected]
ould
This cadvert...
ur
*
be yo r R100
fo er insertion)
(* p
Menlo Park Pretoria
Your location
Is thisert?
adv
your
[email protected]
www.hobbycentre.co.za
Garsfontein Pretoria
315 Lynnwood Road
cnr Ox and Lynnwood Rd, Menlo Park 0186
Tel 012-362-4925
Menlyn Pretoria
Pretoria North
RCRC
RADIO CONTROL REPAIR CENTRE
Peter Frost for personal service
731 Great Dane Street, Garsfontein East
Fax 012-998-3049 * Cell 082-854-0012
Shop B5, Menlyn Retail Park
Cnr Lois and Garsfontein Roads
Tel 012 348 0308 • Fax 012 348 0309
[email protected] www.jixhobbies.co.za
Specialized in JR/Spektrum radio repair and service
Pretoria East
+27 31 702 7017
55 Fourth Avenue, Newton Park, PE
011-972-9134 083-269-6785
082-854-9840. Fax 011-972-7598
011 802 8500
Mark
Savage
Centurion
Benoni
Centurion
Radio-controlled Planes, Helicopters, Cars, Workshop & more
SA Modelsport
We make dreams come true!
Speak to Henke for all your RC
helicopter requirements
Your one-stop Hobby Shop!
for Radio Controlled Models
tel
(012) 807-4667
e-mail
[email protected]
website
www.masterrcmodels.co.za
Shop 1E, Willow Way Shopping Ctre, Lynnwood Rd, Pretoria
3 Kingsbrook Road
Hatton Estate
Pinetown 3610, KZN
[email protected]
Port Elizabeth
Port Elizabeth
cnr Monument & Eland Rd, Aston Manor
Flown with Passion
RADIO ACTIVE MODELS
Shop 11, Doornkloof Mall, Protea Str., Doornkloof
Tel 012 667 5757
e-mail [email protected]
Springs
Cnr South & Heuwel Streets, Centurion, Gauteng
Tel 012-663-3895
Fax 012-663-5570
[email protected] www.modelmania.co.za
Your RC Helicopter Specialist
Tel & fax
+27 11 425 0850
www.samodelsport.co.za
[email protected]
Springbok
SMITTIES HOBBIES
RC Services
011-815-3921
FUTABA Service Centre
156 Third Street, Springs
[email protected]
http://smittieshobbies.tripod.com
Pieter Bosman (Bossie)
Tel/Fax 027 712 3762
Cell 082 926 9221
Benoni (www)
ould
This cadvert...
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foper insertion)
(*
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+27 84 831 4533
SA home of LADO electric retractable undercarriage systems
www.robinmodelaviation.com
[email protected]
[email protected]
Support your local dealer...they are supporting you!
Book your space here. Send details to [email protected], or telephone 011-973-3679

news - SAMAA

Transcription

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