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Prop pitch measurement, pitch=2 π r tan a

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dog

Well-Known Member
Joined
Dec 29, 2019
Messages
1,431
The prop that came with my project has the pitch
marked on it as 00.
Senenich M76AK cut to 68 and 9/16
measured the angle at a radius of 25.68"
and got 15 and a half degrees
pluged that into the formula found on the interweb,which is p=2πrtana and got 44.7
Does anyone recognise this formula or
have another one?
 
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