RCU Forums - View Single Post - Contra Rotating Propeller Drive for f3a 2m Pattern Planes
Old 09-16-2010, 09:53 AM
  #76  
Brenner
 
Join Date: Jul 2007
Location: Bridgman, MI
Posts: 794
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Default RE: Contra Rotating Propeller Drive for f3a 2m Pattern Planes

No, ours is the same as Seba's. Each prop can run at a different speed. What's common between the props is the torque multiplied by the rpm of the prop, which is a proxy for power. Each prop absorbs the same amount of power, so if one prop is wider than the other prop (for instance...) the torque into the prop will be increased, and the rpm will be decreased. Also, we don't have any belts. We use gears.