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Thread: RPM and speed
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Old 09-19-2003 | 01:06 PM
  #5  
roywiglesworth
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From: Woodford, VA
Default RE: RPM and speed
this might help



formula pitch x rpm x effency (1 would be a perfect airframe with no drag a .5 would be something like a cub for jet style prop planes a .85 would be close to
a real figure) x .000947 = mph
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