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Old 20th Jan 2009, 19:57
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mm_flynn
 
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Originally Posted by Pilot DAR
I observe that the original question was asked in the context of endurance, not range. As I recall, endurance is not at all affected by winds. Range is. Endurance is simply what is the greatest length of time the aircraft can remain airborne, going somewhere is not a part of that, so winds are not either.
I thought it had been answered - but a quick flick through shows - No we have answered many other questions but not the one asked !

I think the answer is

1 - An airspeed very close to Vx (max excess power so we have the maximum possible reduction in power available - however Vx is determined at full power and the thrust vs IAS curve may be slightly different at lower power settings)

2 - Best possible efficiency of the engine/propeller
a - Leaned to 25 degrees or so LOP (Best BSFC)
b - Turning the prop as slow as allowable (Reduced pumping losses and I believe slightly improved propeller efficiency)

3 - MP set to the minimum value consistent with level flight
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