RE: Propeller Safety
The 'Worlds fastest Indian' was a great movie. Burt did all that and more. There are a couple of books and a documentary from the early 1970s around about what he did, quite amazing. Tools = a file, vice and and an electric drill, and of course time did not matter to him. The actual Indian bike and other bits and pieces are on display in a local Hardware store in Invercargill.
Cheers
David