Re:Lilium – Electric vertical take-off and landing jet
by snerbles on Friday April 21, 2017 @04:04PM
(#14168969)
Helicopters can auto-rotate, "gliding" on the momentum of the main rotor. This allows for a controllable landing under loss of power.
There have been rare cases where a mechanical failure seizes the main rotor, such as the crash of the WNBC news chopper (N8617B) in 1986. This particular incident was caused by poor maintenance, however.
There have been rare cases where a mechanical failure seizes the main rotor, such as the crash of the WNBC news chopper (N8617B) in 1986. This particular incident was caused by poor maintenance, however.
https://en.wikipedia.org/wiki/Autorotation
http://www.check-six.com/Crash_Sites/Dornacker-N8617B.htm