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Old 04-16-2007 | 03:05 AM
  #6  
haasjj
 
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From: Dickinson, ND
Default RE: ground effect?
I'll check the book I read when I get home but I think it is either half of the main rotor diameter or full rotor diamiter, meaning 25 in main rotor your heli should be out of ground effect at 25 in.
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