I sometimes help my friend, who is a carpenter, in his workshop and he have told me a story when something like this hapenned in real life. Some guys have put a sawblade on a mashine that it wasn't build for- i'm not sure about the terminology but i think it's called a router in english, but It was a big, stationary one. The mashine could spin on a few gears like 3000 RPMs, 6000 and so on, all the way up tu 13000 RPMs. The blade however was rated to spin 3000 RPMs max. They forgot to make sure that the mashine was on the right gear and turned it on, on a 13000 RPMs setting. Suddenly they heard "hshshshshs" as the saw was passing thrue the air. One of the guys turned pale and said that it barely missed him. The blade dissapeared- all they found was a groove in the worshop wall, about the width of the saw. (Sorry if i misspeld something or my english is bad- it's not even close to my first language)
Nice! You are right, some rotation would be extremely cool. Then the flight will be much more stable. If you use higher pressure (like 350 bar) you can also make the weapon portable.
