- My friends and I have been using potato guns for a couple of years now while camping. This year we were thinking about building a catapult. Does anyone know where I can get plans for one??
- for my pnematic cannon, i'm using a 1-inch
soleniod sprinkler valve. What kinda batteriers do i need
to make it work?? 3 9v batteries dont seem to
accomplish the job? If you use a soleniod valve please tell
me what batteries you use. Thanks.