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Old 29th September 2011 | 07:06
  #23 (permalink)  
AMDEC
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Joined: Jan 2010
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From: South of France
Froude theory
Froude theory tells that with a 10m diameter rotor you need at least 7.5kW to hover 500lb and more than 12kW for 700lb. The burden is less on the second crew member but still challenging !
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