Evolution Engines 35GT2 - Manual (Page 3)

3
Mounting the Engine
Most model airplane designs make provision for an engine
mount. It is extremely important that the engine mount be
securely mounted to the airplane’s firewall and that the engine
is securely mounted to the engine mount. Follow the instructions
included with the airplane for mounting the engine.
The engine should be fastened in place with 4 screws through
a conventional beam mount. Use 8x32 screws (26GT2) or 10x32
(35GT2). If you decided to fasten the engine using a flexible
motor mount, always choose parts with enough integrity and
strength. Make sure all screws are tightened and regularly check
that they are tight and in good condition.
Important: Air is necessary to cool the engine during operation.
Make sure that sufficient air circulation through the cowling is
provided. As a basic reference the outlet area should be 3–5
times the area of the inlet area to provide adequate cooling.
Throttle Linkage
Carefully attach the throttle linkage to the engine using a ball
link on the carburetor. Make sure that the linkage is free to
operate from low throttle to high throttle and confirm that the low
throttle setting on the transmitter closes the carburetor butterfly
to the low idle position. Adjust the length of the pushrod until full
throttle opens the carburetor butterfly fully, while low throttle, low
trim completely closes the butterfly.
Attaching the Fuel Lines
Use medium gasoline-compatible fuel line in the fuel tank
as well as the supply line to the engine.
Selecting a Suitable Propeller
The Evolution 26GT and 35GT have been designed to generate
maximum power at 8500 rpm, according to the type of exhaust
used. If you wish to utilize the maximum power output, choose a
propeller, which will allow the engine to reach these revolutions,
or slightly lower revolutions. (The engine will unload in the air
depending on the aircraft speed and propeller selected.) We do
not recommend using propellers that allow the engine to reach
more than 9000 rpm on the ground.
Fuel for the Evolution Gas Engine
The Evolution gas engine has been designed to run on a mixture
of high quality unleaded gasoline and synthetic oil intended
for racing 2-stroke gasoline engines. For the break-in period of
the new engine, mix the fuel in a ratio of 30 parts gasoline to 1
part lubricant. After break-in use a ratio of 40 parts gasoline to
1 part lubricant.
Suggested Propeller Dimensions
16x8 16x10 16x11 16x12
17x8 17x10
17x12
18x6 18x8
26GT2
18x8 18x10
19x8 19x10
20x8 20x10 20x12
35GT2
7795.3_EVO.gas.manual.Final.indd3 3 7/19/06 4:37:47 PM