PPRuNe Forums - View Single Post - Police Helicopter loss of tailrotor authority 2019
Old 5th Mar 2021, 05:49
  #11 (permalink)  
DOUBLE BOGEY
 
Join Date: Dec 2006
Location: UK and MALTA
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I think you have misunderstood. The aerodynamics, wind etc dictate that when the cab is yawing right (unanticipated yaw) full left pedal will stop the yaw without further recovery action. (In Counter c/w rotors). Now if the wind when x-wind exceeds TR authority it won’t happen in that heading but further around. In extremis as the cab yaws downwind or back into wind the yaw will stop if sufficient pedal is applied. This is the only valid teaching point and it’s sole aim is to prevent the hard landing we saw in the video. As the presenter states, as the rapid unanticipated yaw occurs to the right the inexperienced pilots arse falls out as he misdiagnosis a TR Thrust failure. The TR PEDAL CURVE tool aptly describes when the yaw is rapid at the key hog point if opposite pedal not applied quickly enough.

you can’t argue that any helicopter design is not capable of holding heading with yaw at least into wind otherwise fwd flight would be impossible.

the rest of the argument is hot air and misunderstanding. If you still believes in LTE then you are a statistic waiting to happen.
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