Search found 5 matches

by saveitforparts
Mon Jul 13, 2020 9:39 pm
Forum: Combustion Cannons
Topic: Potato Howitzer
Replies: 5
Views: 726

Re: Potato Howitzer

Looks outstanding. But the coax design is killing the performance. I would expect a gun that size to be firing something like a spud at about 150-200 MPH. From the video I would guesstimate about 50 MPH or less. Any idea what the chamber and barrel volumes are? But it does looks sweet. I don't have...
by saveitforparts
Wed May 13, 2020 2:21 pm
Forum: Pneumatic Cannons
Topic: Small pirate cannon
Replies: 2
Views: 472

Re: Small pirate cannon

I'll look into swapping those out, I try to use all pressure-rated stuff but I have an assortment of pipe hoarded and might not have been paying attention. I've never done a pneumatic actuation on a sprinkler valve, will look into that. The electric system does seem to be a little laggy, hence the w...
by saveitforparts
Wed May 13, 2020 2:17 pm
Forum: Combustion Cannons
Topic: Potato Howitzer
Replies: 5
Views: 726

Re: Potato Howitzer

Ha, the tubing at the beginning is plastic (not sure what sort actually). All of that stuff came from a work clean-up where someone left a bunch of junk behind. There was some metal tubing left behind as well, which I grabbed, but I don't own a welder (it's on the list sooner or later). I was thinki...
by saveitforparts
Tue May 12, 2020 10:47 am
Forum: Pneumatic Cannons
Topic: Small pirate cannon
Replies: 2
Views: 472

Small pirate cannon

Some friends talked me into chipping in on a horrible pontoon boat from Craigslist, so I figured it needed a cannon. 4.jpg Youtube vid of building and testing it: https://youtu.be/y364uvJSq-U I still need to swap out the air hookup for a self-shutting version, otherwise I've just been keeping it hoo...
by saveitforparts
Tue May 12, 2020 10:16 am
Forum: Combustion Cannons
Topic: Potato Howitzer
Replies: 5
Views: 726

Potato Howitzer

I just finished building a wheeled potato "howitzer" out of spare parts. It works pretty well, although I need to take it somewhere a bit more rural for testing once it's legit to travel around again. 1.jpg 2.jpg Youtube vid: https://youtu.be/ocxYe_j6nOw It's got the standard 2" barrel & 4" chamber ...