Construction Manual Little Chicken

Transcription

Little Chicken
Construction Manual Little Chicken
Content
1.
Introduction .................................................................................................................................... 2
2.
Build of the Little Chicken................................................................................................................ 3
2.1.
Plan of the parts ...................................................................................................................... 3
2.2.
Making the parts ..................................................................................................................... 4
2.3.
Assembly ................................................................................................................................. 5
2.3.1.
Wing ................................................................................................................................ 5
2.3.2.
V-Tail ............................................................................................................................... 9
2.3.3.
Fuselage .........................................................................................................................10
2.4.
Paint Job.................................................................................................................................21
3.
Maiden ..........................................................................................................................................22
4.
Summary........................................................................................................................................23
5.
Appendix........................................................................................................................................24
5.1.
Resources ...............................................................................................................................24
5.2.
Parts List .................................................................................................................................24
5.3.
Used RC-Electronics ................................................................................................................24
5.4.
Need Tools .............................................................................................................................24
Seite 1/24
09.04.2012, Klaus Schwarz
Little Chicken
1.
Introduction
Welcome friends of flying chicken.
I wanted to make a simple plan for a small chicken and design and build this at the same.
The plan is simple and the construction of some minor reworking necessary.
If you have done it then at some point, you are holding a little chicken
- with approx 85cm wingspan and
- weight 150g
in your hand.
For anyone who still has any experience with DIY model aircraft, the replica is not highly recommended,
but doable.
The materials may also liked to be varied and the construction of course.
Here I describe just how I did it. There is enough room for improvements.
Because I am not a professional in the development of flight-capable objects, I used known techniques/
settings and modified them slightly.
I have also tried to make the construction as simple as possible and have therefore used for the wing a
KFM2 profile. The profile is probably not really a big hit, but very easy to build.
Unfortunately, the construction of the fuselage has succeeded not quite that simple, but can be
simplified.
Unless otherwise noted, UHU POR is used for all bonds.
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Little Chicken
2.
Build of the Little Chicken
2.1.
Plan of the parts
The plan includes only the individual parts as well as lettering and numbering. The use of the individual
components is described in this manual.
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Little Chicken
2.2.
Making the parts
The plan is printed in the desired size, cut out the pieces and
transferred to the contours of the material.
In the absence of Depron I used SELITAC parquet underlay 3mm.
This comes in cardboard folded into a 10 sqm.
KFM2 the lower part (5) is drawn by transferring only the lower
part of the KFM-upper part (4).
The winglets will not separated at this time.
Figure 3: Contours applied to material
Figure 1: Selitac
The disadvantage of the material is a checkered surface on one
side and a slightly uneven surface on the other side. The
advantage is that it can be bent by squeezing rather well.
I hold the stencil on the Depron and paint the contours with
permanent markers.
The parts are then cut with a sharp utility knife or a
scalpel blade cut.
Figure 2: Selitac rough side
Figure 4: Parts
For simplicity, I will write here more from Depron.
Until now, everything is still very simple.
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Little Chicken
2.3.
Assembly
2.3.1.
Wing
First, the wing is built.
Figure 5: Wing, part 1
Figure 7: Assembly of KFM2-top
For this purpose the KFM2 lower part (5) is glued onto the wing
(1) .For aligning the KFM-lower part, the KFM-top (4) is used.
Above the KFM-lower part is a 2mm CF rod (2) adhered to the
wing. The length of the CF rod is to be chosen so that it is not in
the winglet-section (3).
On the prepared wing the KFM2 upper part (4) is glued and then
the nose is sanded like seen on the picture.
Figure 6: Sanding part 5
Figure 8: Assembly of the winglets
The KFM2 lower part is sanded at a slight angle.
Thereafter, the winglets (3 & 6) are separated from the wing and
glued at an angle of about 15 ⁰ with Belizell or PU-glue back to
the wing. To fix the position of the winglets I put a block of
Depron on both sides.
Now you have to wait a little longer.
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Little Chicken
Figure 9: Assembly of the wing panels
Figure 11: Wings top
If the winglets are fixed, the wings are glued together. These two
halves are glued to a construction aid (see below), glued to balsareinforcement (21 & 22) with UHU POR-and then glued and
reinforced with Belizell.
Thus dry.
The ending parts of the wing top (8) are to be cut to get the angle
of the V-shape and according to the airfoil thickness and wing
angle.
At the rear, there are 3mm, 12mm at the front.
At the lateral ends of the wing upper part (7), the contours of the
airfoil is to be cut.
Figure 10: Construction aid
Figure 12: Wings top / clipping
Under the wing I have attached a small construction aid with
UHU-POR / dotted. The subframe has an angle of about 170 ⁰. At
this angle, the wing is for drying.
After drying, the auxiliary frame can be removed.
Check the contour again and then cut out the other side as well.
Then bend the wing top surface in the form and glue it on top of
the wing. In addition glue BELIZELL around the edges.
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Little Chicken
Figure 15: Wing attachment
Figure 13: Ending part of wing top
For the front end cut a balsa part of the template (8) and drill a
5mm hole at the level of canopy lock.
Then the frame is pushed over the canopy lock and glued into the
upper part. After all increase all seams with Belizell.
Glue an ending part of the wing top (8) at the end of the wing.
Figure 14: Wing top, front
Figure 16: Wing angle Depron slats
Glue a small piece of 3mm balsa, about 1.5 cm long on the lower
side of the wing top and then the canopy lock.
To set the right wing angle Depron slats are glued on the bottom.
The slats are starting from the middle of the wing with 0mm to
about 4mm to the beginning of the wing. Between the two strips
glue a small piece of Depron as shown in figure 16.
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Little Chicken
Figure 17: Positioning aid for the wing
After this cut a small narrow strip of 1cm foam and glue it at the
end of the wing as shown. This rear part of the wing is later
inserted into the receptacle on the fuselage.
Figure 18: Wing finished
Now the assembly of the wing is finished.
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Little Chicken
2.3.2.
V-Tail
The V-Tail is easy to build.
Figure 21: V-Tail Rudder
Figure 19: Parts of the V-Tail
The two V-tail, half bodies (11) are glued to the V-tail halves and
the rudder are separated from the halves. After gluing the bases
they are sanded.
Figure 20: Gluing the V-Tail
Then attach a small angle (105 ⁰) between the tail halves and
glued it. Thus, the tail is strong enough reinforce the bottom of
the V-tail with Belizell.
After drying remove the angle.
The rudders are beveled on the bottom. Glue the control horns
on the top with Belizell.
Figure 22: V-Tail
I have attached the rudder with UHU POR-hinges (see Resources)
to the tail.
Now the V-tail is also finished.
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Little Chicken
2.3.3.
Fuselage
The fuselage is more difficult to build.
It starts with the main bar, consisting of two curved parts (14 &
15) and a (in my two) linear portion (17).
Figure 25: Fuselage sides
On the freely available 3mm border of the main bar, the fuselage
sides (16) are glued in the middle.
Figure 23: Parts of main bar
The fuselage half pipes (14 & 15) are bent and glued to the
fuselage cover that stops at the sides of a 3 mm margin.
Figure 26: Fuselage frame
Figure 24: Fuselage bar
Front and rear parts are glued together. Care must be taken that
the main bar is glued without distortion.
Glue the fuselage frame (28) onto the center of the main bar and
cut the frame if necessary. The long part shown, trapped in the
fuselage section provides only that the adhesive can be vented.
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Little Chicken
Figure 27: Lower Fuselage Cover
On the underside of the fuselage, a separately measured and
prepared cover is glued on.
Figure 28: Chicken Belly
Then on each side, two layers of strips are glued slightly to the
inside and as the last one a little narrower strip.
Figure 29: Sanding the Belly
The resulting base is now sanded to a round belly, first with the
rough, in the end with the finer sanding sponge.
Figure 30: Support for V-Tail
As support for the V-tail part (20) is to be bent and to be glued on
part (19).
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Little Chicken
Figure 31: Attachment V-Tail Support
Figure 32: Closing V-Tail Support
To make the V-tail support more pretty a small cover is to be
glued on the beveled support.
After sanding and gluing the support on the fuselage the seams
are to be reinforced with Belizell.
Figure 33: Joining Support-Fuselage
Cut a small piece of Depron and glue it between fuselage and
support.
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Little Chicken
Figure 34: Opened Support
Figure 36: Servo Holes
Open the cover of the support so that the V-tail fits into the
support.
The fuselage cover is opened step by step according to the build
progress.
Make two holes for your servos into the main bar at the end of
the even part of the fuselage.
Figure 35: V-Tail Assembly
Figure 37: Servo Installation
Glue the V-Tail into the prepared support and reinforce it with
Belizell.
The front servo must be in a higher position than the rear servo.
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Little Chicken
Figure 40: Rear Top Part
Figure 38: Bowden
For fitting into the V-tail the edges of the rear top part are to be
shortened.
Glue the bowden tubes so that the tubes are aiming to the
rudder horns.
Figure 39: Rear Top Part
Figure 41: Assembly Rear Top Part
Now the rear end of the fuselage can be closed.
Cut a small strip from a frame (8) and glue the frame onto the
main bar cover 20mm behind the front of the rear top part (15)
(see figure 38).
After that the rear top part can be glued onto the cover of the
main bar. Be sure that the part is fitting to the fuselage and the
tail.
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Little Chicken
Variant A: Selfmade head
If you don’t want to buy a Styrofoam ball you can make your own
head out of Depron.
Figure 42: Intermediate Results
Now another important step is finished.
Figure 43: Half Ball
Take the part half ball (23) und glue all teeth. The result is better
if the teeth are cut with a diagonal cut to the inside of the ball.
Figure 44: Half Ball
The surface of the ball can be optimized when you press the ball
onto the ground. Fix the shape by gluing a small circle of Depron
into the middle of the ball.
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Little Chicken
Variante B: Styrofoam ball head
My build of the head is not well done. The next time it will be
better.
Figure 45: Ball Reinforcement
Use Belizell to reinforce the ball.
Figure 48: Styrofoam Ball
First split the ball with a hot wire.
Figure 46: Ball Sanding
Sanding the ball make it much prettier.
If you decided to build your own chicken head the main bar must
be extended.
Figure 49: Styrofoam Ball Halves
Hollow out the ball with a hot wire, knife or with any other tool.
You will need a small support surface for the main bar.
Figure 47: Alternative Head
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Little Chicken
Figure 50: Bill Parts
The bill is to be build from the two bill halves (13)
Figure 51: Bill
Glue two reinforcement stripes into the bill.
Figure 52: Motor Frame
The motor frame is made of 3mm balsa. Glue it on the top of the
bill.
Figure 53: Head Support
Cut the border of the main bar so that the main bar fits into the
prepared supporting surface of the ball.
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Little Chicken
Figure 56: Front Fuselage Frame
Cut a Frame (8) from 3mm balsa and drill a 3mm hole for the
canopy lock. Then glue a washer with CA over the hole and then
use Belizell.
Figure 54: Assembly Lower Head Half
Glue the lower head half onto the main bar and then glue the bill
onto the head. Think of the motor camber (~. 5⁰, see also Figure:
64).
Reinforce the join fuselage – head with Belizell (PU).
Figure 57: Assembly Front Frame
Put the wing into its position and mark the front of the wing on
the main bar cover. Glue the frame with 2-3mm distance (front
direction) to the mark onto the cover.
Figure 55: Assembly Eyes
Make two even areas for the eyes on the upper half of the head
by sanding the Styrofoam.
Glue the eye halves into the areas.
Figure 58: Joining Head / Fuselage
If necessary do some repair with a small piece of Depron.
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Little Chicken
Figure 61: Assembly Battery Compartment
Figure 59: Installation of Electronics
Mount the motor on the motor frame and put all electronics into
the bird. Place them as far as possible in the front of the chicken.
Cut a hole in the front bottom of the main bar and glue the
battery compartment into the hole.
Figure 60: Battery Compartment
Figure 62: Assembly Upper Head Half
To get more space in the fuselage I build a small battery
compartment.
Now cut a small cover for the front frame and glue it over the
frame.
The two head halves can now be sticked together.
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Little Chicken
Figure 63: Cockscomb
Figure 65: Finished Shell of the Chicken 1
For a pretty good looking hairstyle of the chicken you can use the
parts (24 & 25).
Figure 66: Finished Shell of the Chicken 1
Figure 64: Head
Fix the Cockscombs at the head.
Before painting you can now make small repairs and the final
finishing.
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Little Chicken
2.4.
Paint Job
The chicken I painted with acrylic.
The colors should always chosen by yourself. I use colors from my
stocks.
First, a few unpleasant places are to be repaired with modeling
filler and polished when dry with fine sanding sponge.
Figure 69: Between state
I colored it two times.
Figure 67: Repair work
After that you can start with painting.
This is the golden cock from the church ☺
Figure 68: Wing coloring
The wing I make up two-tone and white on the underside.
Another disadvantage of SELITAC: It's green!
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Little Chicken
3.
Maiden
For a more detailed description of the flight behavior I still lack
the necessary experience, but if I can handle the bird with it most
of the others should too.
Preparations
The maiden flight, I dare times with an emphasis ¼ the area of
depth from the leading edge.
As a precaution, I'm doing some Expo at the rudder.
The flight
Surprisingly, the chicken flies out of the hand with the set very
well.
Figure 72: The beard is from
Figure 70: Start
Because the rudders are working for my taste very toxic, I've
Expo increased to 50%. For me it's my first model with V-tail and I
have to get more experience.
Otherwise the chicken will fly both slow and fast without any
problems.
Figure 73: Flyby
Figure 71: I do not have a good figure?
The beard is expected to be canceled at one of the landings. If
you do not have tall grass for landing, you should leave it.
Figure 74: A happy Klaus
Now I can do the paint job.
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Little Chicken
4.
Summary
The little chicken is not built just quickly and requires little experience. Just the dry times of Belizell (PU) slow the
build speed enormous.
If you have done it, you get as a reward an attractive model.
Such a small chicken or small rooster cries out for a sound module.
Because it should be small, light and easy, I'll try it with these parts of Conrad:
-
191779 – 62
191184 – 62
SMD-Baustein Subminiaturleistungsschalter
Greeting card module 4.5 V/DC recording time 10 s
In this sense:
doodle-doo!
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Little Chicken
5.
Appendix
5.1.
Resources
UHU-Por-hinges: http://www.youtube.com/watch?v=fSE6v9NFRCM
Kline-Fogleman Profile (KFm): http://en.wikipedia.org/wiki/Kline%E2%80%93Fogleman_airfoil
5.2.
Parts List
Name
Selitac parquet / laminate underlay 3mm, or 3mm Depron
Bowden tube ca. 40cm (Anlenkungen)
Steel wire 0,8 mm ca. 50cm (Anlenkungen)
UHU POR
Belizell white (or PU-glue)
Adhesive film
CF-rod 2mm x 1000mm (wing)
Balsa 3mm, ca. 100mm x 100mm (reinforcements)
Styrofoam ball diameter 80mm (head)
Styrofoam ball diameter 20mm (eyes)
Washer, inner diameter 3mm (Verstärkung für Tragflächenverschluss)
CA
Modellier Moltofill (light filler)
5.3.
2
1
1
1
1
1
1
1
1
Used RC-Electronics
Name
Servo
Motor
ESC
Prop
Lipo
Rudder horn
Canopy lock
5.4.
Count
Item
Dymond D37 eco (3.7 g)
Hacker A10-15s
Turnigy Plush 6
GWS 7035
Lipo 2s 350mAh
Kavan
Graupner canopy lock
Count
2
1
1
1
1
2
1
Need Tools
Name
Scalpel blade
Scissors
Permanent marker
Sanding sponge rough & fine
Triangle
Pen
Hot wire (not mandatory)
Pin
Count
1
1
1
1
1
1
2
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Construction Manual Little Chicken

Transcription

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