PPRuNe Forums - View Single Post - Police Helicopter loss of tailrotor authority 2019
Old 4th Mar 2021, 14:04
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DOUBLE BOGEY
 
Join Date: Dec 2006
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CRAB, not so sure about this. The classic conditions are to pedal turn with MR torque, the wind catches the pilot out at the 220 degree position in the turn then failure to apply, sufficient power pedal to arrest the yaw. You can see the cab does about a 360 before the hard landing. Then

miraculously it lifts into the hover with stable zero yaw. You are right about the Bell Myth though. If the torque was already high then the result could be a slight overtorque but that is preferable than a hard landing with undercarriage damage. My armchair assessment is yawing rate to high for the conditions and the failure to apply opposite pedal to arrest the yaw. Its a big movement of the LH pedal in the big bells to control the yaw.
This is why we should always guys to do spot turns in strong winds in the real helicopter as it exposes those for whom their feet don't dance quite quick enough. The FSTD doesn't cut the mustard for this kind of practice. There is a very good presentation for EASA on this at the following link: (LTE=Big Myth)

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