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Old 03-27-2016, 10:22 PM
  #10  
kyleservicetech
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Location: Wisconsin, USA
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Originally Posted by fhhuber View Post
If motocalc is saying 60% efficiency... the prop is most likely too big.
Yup
To get a motocalc prediction of 90% efficiency out of the AXI motor, you need to put a 16X8 prop on it, and reduce the current to 40 Amps, and Watts down to around 1400 or so.

Problem is, AXI recommends a 20X12 prop and a maximum of 75 Amps for this motor. With this, motocalc predicts over 400 degrees F on the motor. Don't know how accurate motocalc is on their calculation, but to me it's a matter of concern.
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