PPRuNe Forums - View Single Post - Do the UK Military teach Vortex Ring?
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Old 1st Jul 2008, 10:23
  #38 (permalink)  
Shawn Coyle
 
Join Date: Dec 2001
Location: Philadelphia PA
Age: 73
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Any helicopter can get into vortex ring state when the induced velocity from the rotor equals the rate of descent (or air coming up into the rotor)
A low power setting and the start of a descent can give the symptoms at very low airspeed in no wind or tailwind. An aggressive quickstop with a power pull at the end as the airspeed comes to zero can give the symptoms.
Not just in a hover and vertical descent at high rates of descent.
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