AE50R, AE50RA
AE50RAB
Engine Manual
Doc. No. E1.01.0-E
Rev. 6 10-March-2011
Page 18-4
18.3 Cooling
System
18.3.1 General
Arrangement must be made by the engine installer to carry the rotor cooling air out from the
front plate elbow, if fitted, to the oil separator or to some suitable mean of the removing the oil
entrained in the cooling air before allowing it to vent overboard.
Cooling air should be arranged to flow over the engine and exhaust system whenever the
engine is in operation.
An ample supply of cold air must be available to the induction air and rotor cooling fan filters
whenever the engine is in operation.
CAUTION !
On no account should this rotor cooling air be used directly for
cabin heating it may contain products of combustion including
CO & CO
2
On no account should the engine be run without either of the air
intake filters in place.
A VDO temperature sensor is fitted to the engine in the front end plate. Provision of a
compatible gauge is the responsibility of the engine installer.
Coolant 50/50 water/ethylene glycol mix (A corrosion inhibiting anti–freeze must be used, refer
to 5.2.6). This water/glycol mix will provide protection down to -36 °C.
Operating temperature is in the range of 60 °C to 90 °C after warm up. Maximum continuous
100 °C.
Heat rejection rate approximately 25 kW of heat is rejected to the coolant when the engine is
operated at max continuous power (50 BHP).
An integral water pump is provided with the engine. This provides a water flow of approx. 40
liters per minute at 7000 RPM.
Summary of Contents for AE50R
Page 49: ......
