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Old 6th Mar 2016, 23:21
  #13 (permalink)  
flybymike
 
Join Date: May 2001
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Gliders can manage quite adequately in one blade.

https://en.m.wikipedia.org/wiki/Single-blade_propeller

And glider tugs with four blades.

http://www.fly13.co.uk/Tug/
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