Section 7 – Airframe and Systems description
POWERPLANT
3. POWERPLANT
P2006T is equipped with two four-cylinder four-stroke Rotax 912S engines of
98hp (73kW) each, both rotating clockwise. These are partially liquid cooled and
they feature an integrated reduction gear driving constant speed propellers with
pitch feathering devices.
Figure
– Rotax 912S
Cooling system is designed for liquid cooling of the cylinders heads and ram-air
cooling of the cylinders. The liquid system is a closed circuit with an overflow
bottle and an expansion tank.
The coolant flow is forced by a water pump, driven from the camshaft, from the
radiator to the cylinder heads. From the top of the cylinder heads the coolant pass-
es on to the expansion tank (item 1, Figure below). Since the standard location of
the radiator (2) is below engine level, the expansion tank, located on top of the en-
gine, allows for coolant expansion.
Figure
– Liquid cooling system schematic
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