A paucity if information still exists on this one, but for Lebl sake i just want to say that an open mind is required that I am not being one eyed about a "failure" because of manufacturing. It may be a failure as a result of a massive over speed - what would break first - Ive no idea.
But let's say the gentleman was overcome with a muscle seizure type of physical dilemma where he pushed down and on with the throttle.
Its quite conceivable, however if that were the case there should be evidence in the M/R attach points, engine and cylinders and especially the tail boom (whirl mode)
Just looking at a head assy yesterday and contemplating something that I haven't before, which is the rotational forces on the hub caused by - full power in one side -- massive drag back the other side on the Hub M/R hinge joints, which are rigid in plane.
Before i only thought of an RRPM over speed in terms of "stretching" the components.
Combine the two forces, a breakage critical point may soon be reached.
Last edited by topendtorque; 25th Jan 2013 at 21:10.