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Composite-ARF Extra 330L (2 x 2m)
techsupport@composite-arf.com
Glow Engine Installation
If fitting a 2-stroke or 4-stroke glow/methanol engine,
for example OS140/160 or YS140/160) you can gen-
erally use the same techniques as shown above for
the DA-50 (gas engine) set-up.
These will give a very lightweight aircraft, but for sure
you will need to install all components, including the
receiver battery, as far forward as possible to achieve
the correct Centre of Gravity. The Rudder servo
mounting plate should also be installed as far for-
ward as possible, and you can save some weight in
the tail by using hi-torque digital mini servos for the
elevators, of at least 5kg torque each.
Of course you will need to reposition the firewall to
suit either a solid F3A type 'beam' engine mount, or a
'Hyde' mount, as necessary. The fuel tank base,
made from the milled composite-balsa parts included, can be used and will accept a fuel tank
up to720ml if required. You can also install the receiver on the vertical bulkhead at the back of
the tank base, as for the gas engine (see photo)
The exhaust system, or mini-pipe, can still be installed internally - but make sure that there is
sufficient cooling as described, and make a balsa baffle inside the cowling if needed to direct
cooling air over the cylinder fins and prevent it just going out of the bottom air exit. If you
chose to fit a full-length tuned pipe you can make a tunnel from thin balsa sheet if you wish.
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