RCU Forums - View Single Post - Propeller efficiency 2 vs 3 blade props
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Old 10-31-2013 | 03:29 PM
  #75  
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Jetdesign
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Screw propellers are totally different.
Water's viscosity is totally different.
There is only one statement from p73 on that discusses 'propulsive efficiency' - which is at the very end and has actual numbers to support.