chr
15th Feb 2014, 15:05
just wondering about procedure during one engine failure on twin according Glasgow crash.
The investigators said that on time of impact rotor doesn'n rotate.I was thinking why pilot did not enter autorotation.As far as I now when one engine failure occur on twin engine helicopter the procedure is to apply collective up to get max power from the other engine.On single engine the correct action is reversed - the pilot need to lower collective to restore rotor rotation.
In Glasgow case if pilot follow procedure and after one engine failure he apply collective up and a second after the other engine flame out pilot had collective up with no power from engine and this can only cause rotor to stop.
Just wondering my behavior in situation like this but I have only experience on single engine piston - if one engine failure the first thing I would do will be lower the collective and pull cyclic to "help" the other engine regain RPM on rotor and then I would start to raise collective up and follow emergency procedure with one engine.
what are you thinking about it ?
regards
The investigators said that on time of impact rotor doesn'n rotate.I was thinking why pilot did not enter autorotation.As far as I now when one engine failure occur on twin engine helicopter the procedure is to apply collective up to get max power from the other engine.On single engine the correct action is reversed - the pilot need to lower collective to restore rotor rotation.
In Glasgow case if pilot follow procedure and after one engine failure he apply collective up and a second after the other engine flame out pilot had collective up with no power from engine and this can only cause rotor to stop.
Just wondering my behavior in situation like this but I have only experience on single engine piston - if one engine failure the first thing I would do will be lower the collective and pull cyclic to "help" the other engine regain RPM on rotor and then I would start to raise collective up and follow emergency procedure with one engine.
what are you thinking about it ?
regards