Mark,
you pobably refer to the initial entry phase of the auto, where you sometimes get the "low" feeling.
This is kind of a low g, but rather induced by poor technique and generally recovered right away.
(Not holding the stick with a little backpressure while entering the Auto and/or lowering the collective too fast - yes that
is possible!)You really never get to the point where the ship starts rolling right, though.
Low G by itself is not an issue either.
It is a missconcept that Low G is what kills you, it is not!
It is the WRONG reaction of the pilot to the situation that eventually kills you!
NOT proposing to do Low G's for the fun of it now!!
It needs training and skill to react correctly and is not a maneuver a initial student (even past the CFII) would be comfortable with.
Prudent flying and common sense will avoid the need for recovery - basically fly as taught, and you will never get in the situation.
As there is no need and no practical application for low g, Robinson did well by prohibiting the maneuver outright.
Also, it is NOT a Robinson only "problem". ANY helicopter can experience it.
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