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Composite-ARF INTEGRAL
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the tongues in place, so that the canopy can slide backwards to dis-engage the front hook !
You can also use this same method if you have chosen to use the optional fibreglass cockpit
base and clear canopy, but the tongues will need to be shortened.
When fitting the clear cockpit canopy it is very important that it is fixed to the fiberglass base
securely all around the perimeter to maintain the torsional stiffness of the fuselage. You can
either fix them together with glue all around, or many very small sheetmetal screws into tiny ply-
wood reinforcements glued under the fibreglass base.
Chin Cowl
This must be very securely fixed in place, especially if using a glow or gas motor, because of the
additional vibration. You can fit 2 short carbon pins (6mm Ø) into the back edges to secure it into
2 short carbon tubes glued into the flange of the fuselage with epoxy and microballoon mixture,
as shown in P17 and P20. This is secure and rattle-free method, and the parts for this are includ-
ed in the hardware pack.
The front of the chin cowl can be held in position with a single M3 x 12mm allen bolt, thru' small
3mm lite-ply reinforcing plates, into a T-nut glued inside the fuselage (see P18). Alternatively, if
using a glow engine with a front mounted carburettor, then you can use 2 bolts (1 on either side)
to give clearance. Access to the bolt is easy with a ball-ended hex wrench (see P19).
The sides of the cowl should be aligned with the fuselage using small tabs, cut from the pheno-
lic strip provided, glued into the flanges of the cowl (P17 inset). File matching slots in the flanges
of the fuselage, and reinforce underneath the slots with scrap 1.5mm thick plywood as needed.
Motor mounting
There are so many options and choices of motor that it not possible to mention, or show, them
all here. However we have shown a couple of typical set-ups here, including an OS200 (photo
P19) and YS160 installation from Jason Shulman, and Jean-Pierre Zardini's electric version with
a Hacker C50XL (photos P28 - P31 inclusive).
If fitting a gas or glow motor with a short header and muffler (without tuned pipe) it is most like-
ly that the completed aircraft will be nose-heavy, so plan to mount all the other items (batteries ,
Receiver etc) as far back as possible.
Included in the kit is a carbon/plywood sandwich firewall for gas/glow motors, for you to install to
suit your motor. Also in the kit is a set of milled carbon sheet parts to suit a Hacker C50 14XL
motor, with both 'flexible' and 'hard' type mounts included. Several photos here show the instal-
lation of this motor, with the speed controller secured immediately below and behind the motor
in the cooling airflow.
Normally glow motors are installed on a 'Hyde' type mount (P26), with a separate nose-ring to fit
your motor - which is screwed to the carbon-ply nose-ring that is factory bonded into the fuse-
lage. A milled 1.5mm thick carbon nose-ring is also included in the kit, and the hole diameter can
be adjusted to suit your motor.
The front outer surface of the fuselage is set at the correct side/down thrust in the molds.
Therefore, whatever motor you install (electric or gas/glow) you should start by aligning the thrust
line, and spinner backplate, exactly parallel to this face. The small milled hole in the centre of the
gas/glow firewall marks the centre of the thrustline/centre of the engine mount - just make sure
you glue it in place the correct way around (with the hole towards the pilots left side!)
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