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How do I determine the best e propeller?

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Old 09-19-2016, 11:52 AM
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johntursi
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Default How do I determine the best e propeller?

I used to fly wet fuel but have not flown in several years, I wanted to get back into flying and into electrics. So i took a partially built 40 size trainer, a bunch of inexpensive parts and converted it to an electric tail dragger. Electronics are; motor Turnigy 530Kv 795W, 5S 4000ma, 60A ESC. My one and only prop (I have not flown it yet) is an 11x7e. The airplane RTF weighs 6.5 lbs. I static ran the motor with the following results; with the battery at 95% capacity and full throttle I recorded the following - 20.13A, 20.02V, 403W. I did not record RPM. How do I determine the most efficient prop size and pitch??
Thank you in advance for your thoughts.
John
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