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I have to create a set of Power curves (Power Required and Power Available vs. Velocity) for a propeller-driven Ryan Navion A aircraft at intervals of 1000m.

My question to you is this, due to the fact that the aircraft is in steady level flight will the Power AVAILABLE curve simply be a flat line at:

P(av)=ηP

where η=propeller efficiency (0.8)

and P=engine power variation with altitude

... or is it more complicated than this? When I think about it i'd assume that the power available would vary slightly with velocity but I am just not so sure. Any corrections/help/advice would be appreciated!

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# Aerospace Help with Power Curves for Steady Level Flight

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