So annoying how when people video something... when the action happens, all you get is a crotch shot
or picture of a helicopter, then some fire crackers going off and some video of some smoke from an unknown source.... then post it on youtube
If that heli hovered in one spot for 20 minutes.... no wonder it crashed.... most of the big helis have a 5 minute (or so) hover limit, then they have to do a circuit and reposition don't they? They have to be a specially made heli to hover endlessly?
Don't they all come with MGB torque limitations in the manual? Also, depending on the weight of the payload, some choppers at max weight are allowed/approved to use 120% torque output on takeoff, but are to take off and go.... not take off and hover until they burn off enough fuel to be within the weight limit that the transmission can be at 100% (rather than 120%)
Just what I read somewhere... they start building up heat in the dogbox and the transmission can overheat sitting in one spot.... so they have to do a 60kt little circuit and come back to the hover point for a further 5 minutes, or until the trans gets hot again?
If that heli sat there for 20 minutes without moving, on a hot day, with no wind.... the trans would have been fried for sure... especially if it had 5 people and full of gas? It needs ram air for cooling
Even one of my toy choppers has melted the plastic engine cover from hovering for too long.... I reckon a heli made to hover for long periods would need a fan cooled transmission. Also, on a hot, still day (no wind) would there not be a high possibility in vortex ring state or confined area recirculation? Here is a link to airbus choppers, I think it has some of the limitation stuff
http://www.google.com.au/url?sa=t&rct=j ... PoZecyEZmgYes.... Hannes has died
http://www.redbull.com/en/stories/13318 ... a-red-bull