Aeronca C3 - Toni Clark

Aeronca C3
1/2,5 (40%) scale RC
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1. FUSELAGE
This picture is of the prototype.
We have made improvements in the production version,
like a more realistic engine crankcase dummy
and a more scale like exhaust manifold.
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80°
80°
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Sandpaper the front of the nose bow frame
at an angle matching the contour of the fiberglass
part of the cowl bottom,
allowing the cowl bottom to be fitted
as far back as possible.
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Mount the fiberglass part of the cowl bottom
to the structure as far back as possible.
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“I made the cutouts with a
jigsaw with a fine
No.1 sawblade and a
very fine X-Acto saw
for the straight cuts.
It is a bit tricky, but it
can be done as you see
from the example. The
top rear screw has to be glued
in with Epoxi. By making the
cutout this way right through the hole, the unavoidable
“crack” in the crankcase is
mostly hidden behind
the nut and washer.
The rubber house on
the suction tube on the
engine has to be pushed
inwards a little bit, then the
cutout in the cowl for the suction tube does not
need to be so big and it is almost invisible because of the rubber house behind it. If someone does
not want to do this he can simply enlarge the
cutout in the cowl.
The very small gap between the rear of the propeller and the dummy crankcase is intended, it is
like that on the real engine.”
Gerhard Reinsch
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I’m sorry, but I can’t find these dowels longer than 1m.
Please make a splice joint at the end of the top stringers.
PS
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...the seat is right, it’s your “tail plane” that’s giant scale!
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2. WING
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Scale rib building
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1. Cut a set of bracing strips using the nylon mold as reference.
2. Allign some strips and lock with some paper adhesive band.
The strips must be one for each rib that you need.
3. Allign a bracing strip to side
and trace the referring lines.
4. Saw a complete set of bracing strips.
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You can use also a disk saw
with angle regulation.
5. Refine the angle with sandpaper.
6. Mark each set with a referring nr.
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NYLO N M O L D
LO W ACC U R AC Y I S B E T T E R !
P U T A B I T O F B I C A R B O N AT E P O W D E R
I N T H E S PA C E B E T W E E N T H E S T R I P S
A N D G L U E W I T H A D R O P O F C YA N O A C R Y L AT E .
Note: the ribs shown are of the Bücker kit.
For the C3 ribs use the same procedure.
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C U T T H E G U S S E T F R O M A 0 . 8 M M P LY S T R I P
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NO!
OK!
Note:
If you decide to glue together the spars like shown in the previous page,
make absolutely sure to completely insert the spar webbing into the spars!
Alternatively, you may assemble the wing before gluing the spars to the webbing,
placing all the ribs over the spars and dry fitting the structure over the wing plan
on the building board.
Then, when all is adjusted, make all the gluing joints with plenty of extra thin Cyano.
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Mounting sequence on the flying field
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Mount the cabane on the fuselage.
Release the front fastening
of the windscreen.
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Insert the forks of the wings
on the fuselage tubes,
placing the wing ends on the ground.
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Mount the landing wires using the steel clevises.
DO NOT FORGET to push the security rings
firmly against the head of the clevises!
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4
Place the center bracket on the step of the cabane.
WARNING:
In this condition absolutely don’t move
the wing up or down,
the fuselage may be damaged!
If there is strong wind, get help from a friend
or place a supports under each wing.
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Mount all the flying wires.
DO NOT FORGET to push the security rings
firmly against the head of the clevises!
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Lift the center bracket on the vertex of the cabane
and lock it securely in place with a M4 screw.
Note:
Of course, before assembling
the model on the flying field,
all wires must be perfectly adjusted
and all clevises must be blocked by nuts.
We recommend to make all the adjustments
before covering the model.
WARNING:
Remember to release the windscreen
before dismounting the wings.
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AERONCA C3 scale 1/2.5 (40%)
Wingspan: 4.40 m (14.5 ft)
Length: 2.50 m (8.2 ft)
Wing area: 2.00 qm (21.5 sq-ft) approx.
Weight: 17.5 kg (38.6 lb)
Engine: Valach Motors VM 120B2-4T, 120 ccm
Designed and engineered by Paolo Severin, consultation with Gerhard Reinsch
Fiberglass parts by Toni Clark practical scale GmbH
August 2012
www.paoloseverin.it
Paolo Severin srl
Via Decorati al Valor Civile 57a
35142 Padova - Italy
Laboratorio: Via Monfalcone 11 - Padova
Tel. 049 8800329 - Fax 049 8800354
email: paolo.severin@pallino.it
U.S. distributor:
www.vogelsang-aeroscale.com
Germany distributor:
www.toni-clark.com