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Old 01-15-2021, 09:23 PM
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quorneng's Avatar
Join Date: Jul 2008
Location: Cheshire, UK
Posts: 2,074

That looks a very interesting layout but it does raise the question as to whether any 9x6 prop is good for the sort of power you are considering.
Even if you find a suitable prop the aerodynamic efficiency converting the shaft power into thrust would not be good at the rpm you mention, There will also be some additional mechanical losses of the extra bearings and the tooth belt.
Note also all the 8 bearing in your set up will be under a side load from the belt. A direct motor drive has only 2 bearings and no side load.
I have suspicion a belt ratio reduction (2:1?) would make more sense
It will be very interesting to see how it pans out.

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