AE50R, AE50RA
AE50RAB
Engine Manual
Doc. No. E1.01.0-E
Rev. 6 10-March-2011
Page 18-10
18.5.3 Setting the ‘H’ Screw
Slowly increase the throttle to the WOT position. The maximum engine speed should be as
stated in the aircraft manufacturer’s handbook.
If no flowmeters are fitted, reduce the fuel flow from the high-speed system until the engine
just begins to falter. Then increase the fuel flow until maximum engine rpm is just achieved.
The ‘H’ screw should be as weak (turned clockwise) as it can reasonably be, consistent with
maximum engine rpm being achieved.
The maximum adjustment required is normally ± 1/8 turn from the initial basic setting.
Return to idle and repeat section 18.5.2 to recheck the low speed setting.
Check the snap throttle response by moving the throttle from the idle to WOT in approx. 1
second. If the engine exhibits unacceptable hesitation, the low speed systems should be
richened very slightly. Any such adjustment can be expected to be less than 1/16 turn.
18.6 Oil
System
18.6.1 Oil
tank
Oil tank is supplied by the aircraft manufacturer but must have a minimum usable capacity of
500 ml for each hour of engine running with a strainer of mesh size not larger than 0.5 mm.
18.6.2 Oil
Separator
An oil separator may be fitted to remove oil from the rotor cooling air after is has passed
through the engine. The recovered oil is returned to the induction system, this provides
additional lubrication for the rotor seals, and is then burned in the combustion chamber. The
cleaned rotor cooling air cools the exhaust system.
18.6.3 Line
connections
The oil connection line between the tank and the pump should be calculated to provide AT
THE PUMP INLET a minimum flow of 8 ml per minute at -10 °C by gravity.
