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How to calculate static thrust?

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leviterande

Well-Known Member
Joined
Oct 14, 2008
Messages
133
Location
Danmark
Hi, everyone, there are plenty of thrsut calculators that give you rpm, thrust, tip speed, but not how much power to be required? if it was all about direct driven electric motors, that would be no problem but what about calculating how much a 582 or 60hp engine with a gearing toa 120" prop? how much gearing is required to get the best results and what/how to calculate the thrust from such geared systems?

a rough guess would be a 7:1 gearing perhaps?

Best regards and thank you for your help
Kalle
 
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