I fly a DR400, 180hp with a fixed pitch prop.
Is there an easy way to calculate % power from RPM, or do I have to worry about altitude etc?
Cheers
Not a great deal of info to go on there, but the real question was the last bit.
My answer explained about the effect of RPM, and generally speaking consider the RPM directly proportional for the purpose at hand. The other bit being mass air flow I though was well explained, so in answer to his original question, I could have simply said NO.
However original poster then went on to say,
I've just checked the POH which states that with a 76.58 prop at sea level, 2700rpm gives a power output of 70%. At higher altitudes, this value decreases as expected. I normally cruise at 2400-2500rpm so I guess I can lean the mixture at will?
So the answer to this different question is YES!!!!
Sorry I bothered some of you but there are no doubt others that will have found the extra info useful.
Backpacker, I trust you are familiar with the saying, Give a man a fish you feed him for a day, teach him to fish and he will feed his family forever. Or did I waste my time again?
