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Prop tip critical Mach number?

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TXFlyGuy

Well-Known Member
Joined
Apr 25, 2012
Messages
2,972
Location
Republic of Texas
Is there a critical Mach number for prop tip speed? For most efficient cruise rpm?
Might it be Mach .65?
And if you cruise at Mach .645, this would be getting the most from your propeller?
 
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