If my gut is right, making the baffle shorter (increasing volume of the chamber that has the spark gap in it), will decrease performance (decrease the step function effect). According to the study that inspired hectmarr's other thread, peak pressure should increase, but for a smaller effective volu...

I had this project in mind for quite some time, and I have finally finished it. This is this .22 caliber pistol that fires common pellets, associated with a rupture disc. The advantage is that the weapon can be supplied in the same way as a common, commercial compressed air gun. It has an inverted l...

It's been a long time but I will be getting back into cannons again soon. Good to see some familiar names again

The video I owe around here, of the single pump pistol. In this case, they shoot 1/4" steel bb^s. I have currently switched ammo to 0.23 gram airsoft pellets ; It has about 3.5X and the performance is very good. https://youtu.be/QsRumkMX9NQ?si=n4GxjqizYdjECYNE The operation of the gun in the video i...

I made a tennis ball cannon using a 3” sprinkler valve. It fires a ball at ~150 yards at just 30 PSI. The valve is manufactured by Dorot, repackaged by Galcon, and sold by Drip Depot. The stated flow rate is 390 gallons/minute which is 10x the flow rate of an average 1” sprinkler valve. The valve is...

Hey all, I am building a combustion potato cannon for a school project, a 1.5 inch ABS pipe based cannon (yes I know, pretty risky seeing how people see dmw ABS with its pros and cons here, also because I made the mistake of not researching beforehand), posting about it to get feedback and criticism...

Well, this is a bit awkward, tried to post this a really long time ago but regardless its on here, much appreciation and thanks PCGUY! :D Regardless, the current cannons design, New stuff: gas metering and injection, the thing is a fairly small but it works well regardless at 20-40 psi worth of buta...

ITWOST: Got some new camera gear and figured I'd take a closer look at one of the "good" piston valves I've made recently. https://youtu.be/SVZjXHcsJnk There's a lot more work on the completed project because I want to do silly sh*t, but another small anecdote: you ever head of FOGBANK ? It's some s...

ITWOST: not much going on. Just felt like letting you guys know I haven't forgotten about you.