ORIGINAL: B.L.E.
Do you really think that a rounded leading edge would make any difference should you be unlucky enough to get your finger in the prop's way?
Not sure if leading vs trailing edges was mentioned, but I believe the point was made to help avoid cuts while doing things like priming the engine, installing the prop, etc. Some of them seem to be nearly razor sharp. Anyone who has experienced that oh-so-unforgettable feeling of nitro in a paper cut like wound can understand the value in dulling the edges.
