Thank Canute
Seriously, Crab you say "I know an apache can pull more than 1.7 G so why is the coning angle 'as high as you can get'??"
One last sincere try
Because the RRPM may be drooped (as NL postulates) and/or it is heavy. It's the coning angle that's the 'give away'.
ie regardless of whether the RRPM is drooped or not that coning angle would be the maximum reachable in those circumstances. ie you could not pull harder and get more cone.
So
If light weight at normal RRPM, max G would be (say) 2.5g and the coning angle would be (say) 9.5deg
If heavy weight and low RRPM the G would be LESS (say) 1.7g and the coning angle would still be 9.5deg
That's why cone angle is an interesting (useful) indicator (especially in video)
A helicopter coned to 2deg at 1g would be coned by 6deg at 3g
If 3g were it's max capacity, then 6deg would mark it's limit at other weights and particularly RRPMs and the g would be correspondingly different, but the max coning angle would be the same.
Anyone know what the normal coning angle of an Apache is ? (at that weight!?)
(the greek apache averages at 21deg/sec and 90kts during the pull out phase.
That's just the average, it may have been less (1.2g) in the 1st second and correspondingly more (2.2g) in the 2nd second)
It is assumed that one might acheive an unstalled 20deg of cone for example. That would be wrong, since if the blades are going slowly enough to cone that much then the blades would be going too slowly to make the lift required to cone them that much. So you can't cone a 2deg coned helicopter to 20deg unless it is capable of 10g.
Does THAT make sense? yet?
(Examples of this accodent are, Apache at altitude in Afgan, Dennis in da USofA, Italian Lake disintegration, H500 Belarus. I am sure if any of these folk could have pulled harder they would have)