Long-time readers of this weblog may remember The Amazing Pneumatic Cannon, a potato gun I built several years ago. Unfortunately, it suffered an ignominious end when it fell from the back of the car and broke.
[Jason->] and I recently decided that for our next mad-science project (after the trebuchet and water rocket) we would build potato cannons. His writeup is here on his weblog. I’ll post some video once I get it put together.