Quote:
Originally Posted by xntrx
I wonder if that is under acceleration or at constant speed, and fixed or variable pitch. A conventional drive will lose between 10-25% from friction and pumping (auto), so that's not too terrible. .
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That 59% is in ideal conditions as I understand it, the mathematical max that you can get before air just moves around the prop.
With a regular drive-line you can get 98% with a well designed gear box or chain drive, the rest of it, tires and bearings are going to be the same because you have to have those to have wheels on the ground.