Clerget 9-cyl 1-16 full

Large Scale 1/16
Paper Aircraft Models
by Leif Ohlsson
Feedback & comments to:
Leif Ohlsson
www.papermodelers.com
Cover photo Fleet Air Arm Museum,
Yeovilton (by Wikimedia).
Engine model based on
a previous 7-cylinder version
by Richard Schulten
and 3D-renderings
by Mark W. Miller
The engine model
is a beta-version
for test-building.
The prop model is
well proven.
Printing advice: The kit is formatted
to work for both A4 and US Letter
paper size in inkjet printers. Be sure
that your are not using any kind of
“Scale to fit paper size” setting.
Clerget 9-cyl 130 hp
Rotary Engine 1/16 scale
& Sabre-shaped Prop
Front
Rear
Front
1. The basic parts of the prop laid out - two pieces,
plus the hub which is already assembled here. The
two main pieces twist around so that each of them
starts as the front side of one blade, and ends up as
the back side of the other blade.
2. One piece has been glued to the hub exactly on
the alignment marks. Then the back of the front
side is glued to the rear endplate, and the front
rolled down and shaped on to the front end piece.
All this could be made in one go.
3. The rear sections of the prop are glued down.
The strange angle of the rear section is still visible
in the lower part of the photo, while the top part
miraculously has been shaped to correct position
just by pressing at the point indicatred.
4. The finished prop. Retainers with optional details
have been added. When you’ve glued down and
joined front and rear apply extra twist to the
blades, and shape them between your fingers
further. The prop will stand quite rough handling.
Rear
Fold up and glue the parts above doubled. Details (with
spares) to add on to the prop retainers optional. The two
retainers for the prop go on each side of the finished prop.
Glue the parts with glue tabs below on the back of the
doubled-up end sections (front and rear) above. Remaining
parts below make up the hub of the prop. Glue the end
sections complete with glue tabs on to the hub. Lines and
cross marks are for proper alignment.
Alternative
prop (right):
A truly layered
1/16 scale prop,
all in paper,
from Papermodelers.com:
Rear
Front
Left part has front on top half,
back on lower half.
Right part is the other way around.
Shape front half from backside, to bulge.
Shape back half from front side, to trough.
(Inner layer; glue ca halfway in on back of
outer layer below to form gluestrip)
http://www.pap
ermodelers.com
/forum/downloa
ds.php?do=file&
id=78
Crankcase center section:
• 9-section cylinder base
section in the middle;
identical front & rear
formers top & bottom.
• Cylinder base rests on
inner 9-sided doublers,
flush with outer textured
front & back.
• Round doubled parts form
bases for front & rear
crankcase cone-shaped
sections.
Gluestrip - score & mount halfway
in on back of outer textured part.
This very detailed 3D illustration of a Clerget 130 hp engine is made by Mark
W. Miller. See http://mwmiller.theaerodrome.com/ for the original and other
vintage aircraft 3D-artwork by Mark Miller.
As republished here (permission pending), the illustration is to correct 1/16
scale, and has been used to design the parts for the Clerget 9-cylinder 130 hp
Head
Main
engine. Crankcase front view, one cylinder & some details may be seen faintly
overlaid. Refer to this drawing for positioning of details.
General design and pattern of several details based (with permission) on an original
model by Richard Schulten. His 1/11 scale model of the earlier Clerget 7-cylinder 80
hp engine from 1913 is here: http://home.planet.nl/~schul923/submersible.html
Base
Head
You may wish to
leave these uncut
Exhaust valve
3 sections of 3mm metal tubes
(2mm inner diameter):
• Glue this in fixed section, and
shove that section on.
• Glue this on 2 mm shaft as a
stopper.
• Glue this in fixed section
endpiece and shove that
section on to shaft, with
distance paper tube in
between; shaft rotates inside.
Main
Intake manifold
Base
Above: Cylinder parts only for identification. Parts
for cutting out on next page. All cylinder sections
built up with lids, top & bottom, resting on inner
Below: Front end crankcase sections. This section
closest to propeller: Shaft housing & front cone.
layer gluestrips, flush with outer edges. Glue inner
layer gluestrip about halfway in on back of outer
textured parts . Crankcase cone-shaped parts
below made with similar technique. Press down
lid of smaller end first, from the inside. Then add
larger end lid. Each section made separately.
This section: Main frontal
cone-shaped section
Intake
valve
Glue this end to front
of crankcase section,
above right
Make pushrods
from pins or
wire of suitable
diameter.
Sleeves of thin
paper - do not
fix until
mounted on
crankcase.
Prop
Main shaft
2 mm
pianowire
or similar
Left: Carb
distance
tube
Roll to
inner diam. 2mm
outer diam. 3mm
Below: Rear end crankcase sections. This section
closest to center section: Intake manifold base.
Intake manifold
lower ends
glued against
outer rim of this
section - c.f.
original drawing
for positions.
Rearmost crankcase conical section. If you model double
spark plugs on each cylinder, glue double ignition wires
to back of previous intake manifold section. Then glue
this section in place, securing the ignition wires.
This end
rotates
against
firewall.
Parts to
the right
are for the
fixed
section,
installed
in the
firewall
and
fuselage.
Only for a
very
detailed
model.
Add air intakes
when engine
has been
installed in
fuselage
Endpiece topview:
A piece of cocktail
stick + 2 paper
tubes for air intakes
Rotary section
above; fixed
section in
fuselage right.
Pack up with ca 2 rounds
of paper as spacers
Right: Typical
firewall former
(optional). Back
side is top, front
below.
Double to ca 1
mm thickness.
Use for simple
display or for
modifying
existing firewall in
the model you
build.
A super-detailed
Clerget engine
model would
include
magnetos, fuel
pump, and
various plumbing
details on the
back of the large
diameter fixed
section.
They are not
included in the
Mark Miller
drawing, and
have been left
out of the kit for
now.
Engine instructions
The whole engine rotates, hinged as the fullsize, in a unit which is fixed mainly to the firewall, and
stabilized further aft along the long carburettor intake tube, and the two transverse air intakes at the
rear. They are the little stubs sticking out from each side of most rotary engine WWI-aircraft, and must be
dimensioned according to the fuselage width of the specific aircraft modeled. They cannot be added
until the engine has been installed in the fuselage. There is a stopper hidden inside the rear carburettor
distance tube. This means that you will have to build the rear section, and attach the engine to it, in a
specific order:
1) Glue the rotary front, main, part of the engine to the 2mm shaft. Be careful to follow dimensions given
in the sideview drawing.
2) Make the three bearings of 3 mm diameter (2 mm inner diameter) tubing.
• Insert & glue the first piece in the main engine mount (the one that will be stuck into the firewall
eventually).
• Stick the rotary, main, section of the engine, on its shaft, through this main engine mount, and add the
stopper piece of 3 mm tube. Glue this to the shaft. It will rotate, hidden in the carb distance tube.
• Stick the carb distance tube onto the main engine mount, over the shaft, and its stopper. Glue it at the
front end.
• Stick the last piece of the bearing into the endpiece, and insert this into the rear end of the carb
distance tube, over the shaft, joining the carb distance tube, and glue it to that tube. The shaft & stopper
will now rotate freely inside since the distance tube is of slightly larger diameter. The shaft and rotary
section of the engine are supported by the bearings in the main engine mount in the firewall, and the
bearing in the end piece.
3) The engine is now finished. It is entirely self-contained and can be plugged into the large,
true-to-scale, diameter opening in the firewall. After the cowling of the aircraft has been glued in place,
you can just stick the prop on to the shaft. Friction will usually suffice to keep it in place.