I have always enjoyed making pneumatic potato guns. There's always fun to be found with a gun that shoots anything you can fit in the barrel. So I've decided to post one of my more recent builds of a small caliber potato gun. This is technically my first instructable since my mini-fridge
was just a slideshow, so please bear with me. Plus, I feel I have to redeem myself from that mini-fridge since it ended up all over the internet.
Generic Disclaimer: I'm in no way responsible for anything anyone decides to build/create/destroy with anything from this instructable. Don't even try to build anything related to this if you don't know exactly what you are doing. If you are unsure about anything in a build process with compressed air involved, seek help of a qualified individual or just don't attempt it at all. Be responsible and use common sense :)
A little background info.... The idea to make this particular gun design was kind of a spur of the moment idea. I had some small pieces of PVC laying around and an extra sprinkler valve so I decided to go at it with what i had(save some money too). Most of the potato guns I make are usually larger diameter barrels (1" - 4") but this time I wanted to go small with it. The diameter of the barrel I decided to use was 1/2" and the air chamber was 2". I wasn't sure how well this would perform but it seemed worth a try. I will try to be as specific as possible in the build process. If you don't like part of the design or have any feedback, please let me know. I do like to hear peoples opinions, good or bad.
Here's a materials list of the items I used in my version. Depending on the size you wish to build, this list can change dramatically.
This is not a complete list, these are just some of the main parts.
1/2" PVC Pipe
2" PVC Pipe
3" PVC Pipe
2 - 3" PVC Couplers
1 - 3" PVC Cleanout with Plug
1 - 2" PVC Cleanout with Plug
2 - 2" PVC Coupler
1 - 2" to 1"threaded bushing
1 - 1" by 1" threaded pipe
1 - 24 Volt Sprinler valve
1 - 1" threaded to 1/2" slip Coupler
4 - 10" Hose Clamps
2 - 4" Hose Clamps
1 - Cheap Airsoft Gun
1 - SPST Pushbutton Switch
3 - 9 Volt Batteries
4 - 9 Volt Battery Terminals
Miscellaneous Pieces of Wood
You'll also need some pvc cleaner, pvc glue, expanding foam, liquid nails, and miscellaneous building tools.
Also, sorry if some of the pictures are crappy. The best thing I had to take pictures with during the first part of the build was a crappy cell phone.