scary
Fred, First of all the only time I ever heard of a prop cutting one of the booms is when I saw the boom in Don's hangar. If I recall correctly it was from a military 02 Skymaster...not sure though.
Can a prop come off an aircraft? Sure it can but the fact is, it is a very rare thing and a lot of things have to go wrong for it to happen. Perhaps an equal question is.
If a prop comes off a single engine plane, it is going to ruin your day. Like wise, if a prop comes off a conventional twin, that too will ruin your day. Since the chances are so small of that type of an event, if that's what you have to worry about, one should not leave the house, however I will answer the question in another way.
If you look at the free space below and on top of both booms, even if a prop were to leave the hub, the chances of a boom strike are really really small. The boom strike that Don has in his hangar was not a full strike but instead a partial hit on the bottom side of the boom. Hope this helps you out.
Jerry
N34EC
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