Power Required Curve and Drag Polar for PA-34

[infinity-it]

I have to make a generic power required curve and a drag polar for a Piper Seneca-III (PA-34). The Seneca is equipped with a three blade prop.

Does anybody know where I can find the numbers like Oswald efficiency (e), Propeller efficiency (η), Zero lift drag coefficient (Cd0) and a table where I can find out the BHP for the Teledyne Continental TSIO-360KB engine at different altitudes?

Thank you very much for advise

[Martin Kellett]

Funnily enough, I may have just what you need. Prop efficiency is a monster can of worms though - you will have no idea what prop blade angle is set at any particular flight condition, and hence no idea of advance ratio which is the key parameter for prop efficiency.

Please PM me if you'd like to discuss further. I can't post the data in the public domain since it's commercially sensitive.