I wonder why more helicopters can't do the spectacular flip this one does.
The Lynx and Apache can both do these sort of maneuvers.
[video=youtube;ceOpnujmm7Y]http://www.youtube.com/watch?v=ceOpnujmm7Y[/video]
[video=youtube;WwAL8HAAw2k]https://www.youtube.com/watch?v=WwAL8HAAw2k[/video]
Oh wow that second video, I didn't know helicopters were so agile and responsive
[QUOTE=duno;51835147]I wonder why more helicopters can't do the spectacular flip this one does.[/QUOTE]
Most helicopters are bigger than this and square-cube law hits them pretty hard.
I'm not sure what's more impressive. The maneuverability and grace of the helicopter or the mad skills and brass of the pilot taming that beast.
[editline]17th February 2017[/editline]
[QUOTE=Bradyns;51835311]The Lynx and Apache can both do these sort of maneuvers.
[video=youtube;ceOpnujmm7Y]http://www.youtube.com/watch?v=ceOpnujmm7Y[/video]
[video=youtube;WwAL8HAAw2k]https://www.youtube.com/watch?v=WwAL8HAAw2k[/video][/QUOTE]
The Apache is the better looking of the three by far, such a beautiful looking war machine.
[QUOTE=Drury;51835669]Most helicopters are bigger than this and square-cube law hits them pretty hard.[/QUOTE]
[QUOTE=LSK;51836085]I'm not sure what's more impressive. The maneuverability and grace of the helicopter or the mad skills and brass of the pilot taming that beast.[/QUOTE]
Two in one.
The engine RPM stress on the rotor blades via the rotor shaft is part of the issue, the other is in the materials of the blades and the mechanical systems (swashplate) allowing the collective to apply lift and the cyclic to change the plane of the rotating blades.
Heavier rotary aircraft tend to require larger engines which means a scaling of mass per mass that is able to be lifted; most of the aircraft in these demonstrations have twin turbine engines, but are incredibly lightweight in almost every respect.
A combination of lightweight materials for the blades, high thrust/weight ratio engines, and lightweight airframes make these sort of aircraft able to perform the sort of maneuvers you see.
That said, I cannot underscore the amount of mechanical stress that occurs during these sort of maneuvers.
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