PPRuNe Forums - View Single Post - Why do military helicopters crash rather than autorotate?
Old 11th Mar 2011, 22:48
  #20 (permalink)  
grumpytroll
 
Join Date: Jun 2009
Location: In the desert southwest
Posts: 181
Likes: 0
Received 0 Likes on 0 Posts
thoughts on this

you're at 100 feet agl flying at a low airspeed in a very hot environment in a heavy UH60. Lots of power being pulled already. a shocking blast runs through the aircraft. immediately it begins to spin violently because the tailrotor has stopped at a high power setting. you pause however briefly to try and assess what has happened and what to do about it. because you are spinning violently, it is difficult to get your hand on the power control levers, pull them to idle and the get them past the idle detent to off. In the mean time the pilot on the controls has lowered the collective to save rotor rpm so you are descending at a rate of several hundred fpm. Also since the blast hit your tail area, possibly a large amount of weight relative to your W and B has been removed from the aircraft causing the nose to drop violently due to the out of balance condition. in the meantime since you are over a hostile area and trying to locate a landing area amongst buildings, cars etc...

its easy really

Last edited by grumpytroll; 12th Mar 2011 at 01:31.
grumpytroll is offline