A great all round American Scientist and Inventor.
Designed a multitude of things...
The Bazooka! Spinning rocket launchers, High speed cameras, a device for measuring pressures in explosions. Mechanical piano movements.
He was very much a self taught country boy and apparently surveyed and drained a load of farm land as a youngster with only very basic tools. he was also a magician and entertainer...
The book
Clarence N Hickman the Father of Scientific Archery
Is a great read, he was the first person to film the archers paradox (this is how the arrow flexes around the bow rather than shooting off sideways as might be expected) .
He would even perform the 'William Tell Shot' on stage, shooting an apple which was on someones head, with a bow ! (not a crossbow! There was a safety shield disguised under a drap, for any safety officers out there!)
This should also go into the 'favourite books thread!'
He doesn't sem to have a concise reference in Wiki as he was so diverse.
He could fill a whole 'weaponology' section on his own...go get him Moose!
He seems to be one of the rather overlooked 'good guys', I take my hat off to him.