re: 60 MPH...achieveable? Who cares?!? Let blueprint an engine!
It's never been the speed so much as the lack of substantiation - obv if anyone can smack a HT into breaking 50 Jim can...
The "ney sayers" are usually in response to off the wall claims, duct-tape bikes & armchair engineers - often in the interest of preventing false expectations by those new to this game.
All that's ever been asked for is a lil proof lol