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Old 20th March 2017 | 06:08
  #304 (permalink)  
DOUBLE BOGEY
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Joined: Dec 2006
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From: UK and MALTA
20 kts rotoring over a descending helicopter at little or no airspeed would cause problems. However it would do very little to a large helicopter at cruise speed.
Oneperev, what you are describing is Mountain Waves.
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