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2-10 <strong>ALPHA</strong> <strong>Trainer</strong><br />
REV. 0 Aircraft and System description<br />
Engine cooling system<br />
www.pipistrel.eu<br />
Rotax 912 (80 HP) cooling system<br />
The Rotax 912 engine’s cylinders are aircooled, the cylinder heads watercooled. The cooling-air intake<br />
is located on the right-hand bottom part of the engine cover.<br />
Cylinder heads are watercooled. The water pump forces water through the radiator. The engine does<br />
not feature a thermostat valve. The overflow tank fluid level must always be inside the designated<br />
limits!<br />
The engine does not feature a cooling fan, therefore cooling is entirely dependant on moving air currents<br />
and airspeed.<br />
CAUTION! You are strongly discouraged from leaving the engine running at idle power when<br />
on ground for extended periods of time.<br />
The manufacturer recommends use of cooling fluids used in car industry diluted in such a manner<br />
that it withstands temperatures as low as - 20°C/ -4°F<br />
Schematic of engine cooling system
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