Just an idea or two from an oily rag engineering type...
1) How about a g-meter coupled to a servo which applies aft cyclic (bit like a stick pusher on a jet, but of course it would be a puller)?
or
2) How about a sensor on the mast to catch actual excessive angles, triggering the same servo action? Could be a couple of magnets on the rotating parts and a static hall effect probe or two for instance.
Having said that, SPS has the right idea IMO. Avoidance is the key.
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More volts, Igor