Awesome Tennis Ball Mortar

Do you have a lot of tennis balls lying around, do you have a like for ballistics. If so this is the project for you. My freind (WeaponsMaster10) and I built a tennis ball mortar, one thing i must say about it is I OWE ALL CREDIT TO THE BOOK OF BACKYARD BALLISTICS AND I AM NOT RESPONSIBLE TO ANY INJURYS CAUSED BY THIS DEVICE.

this is a relatively cheap weapon compared to the potato cannon. its only around 30$.

Stuff to buy

1. Lighter fluid (the propellent) 5$
2. 3 cans of Pringles (the body) 8$
3. long matches or Barbecue igniter (the ignition) 5$ to 10$
4. Lots of duct tape (one full role) 5$
5. 4in sewer pipe (the same length of pringles put together about 29 to 30 in) 10$

Tools

• Drill or Drill Press
• files
• tin snips
• hack saw (not included in picture)
• ruler

The stuff you need to buy totals around 30$ (relatively cheap)

This step is simple. All you have to do is chose one Pringles can as base and mark one inch up from base. then you drill a 3/16 hole on your mark. This will be your ignition hole were you put your lighter.

Now take the other two Pringles cans and make the baffle the purpose of Baffles is to A) keep ball from going into combustion chamber. They should be about half of the bottom area. My circles were about 1 and 1/2 in. To make the baffle simply find the center of can. Then using a compass ,or just good judgement, mark your 1 and 1/2 in hole cutting this hole is tough but if you drill a lot of holes around the outside ring you can just pop it out later.

This is the most fun part DUCT TAPE! Duct tape the gun together and remember to make it at least 3 think layers. dont forget to solder in the Barbecue igniter if you are using one.

Done go fire. to fire this awesome gun put A little less than half a teaspoon into top of gun swirl and try to get it all to go to the bottom. Next wait about 30 seconds to evaporate then tilt up like a mortar add the 4in sewer pipe as blast shield around outside and finial FIRE. it will be very loud so cover ears and don't shoot your self it is very powerful!