Morgans wrote:

You no doubt have found that the group will get into mental exercises like
this, and you know what they say about opinions... g

What you want to do is mount a lathe bit on a spring loaded arm. You
pull a lever and cut the prop shaft off. Deploy the chute when you feel
the prop drop off the back.

--
This is by far the hardest lesson about freedom. It goes against
instinct, and morality, to just sit back and watch people make
mistakes. We want to help them, which means control them and their
decisions, but in doing so we actually hurt them (and ourselves)."