Search found 1706 matches

by Moonbogg
Fri May 27, 2022 6:04 pm
Forum: BB, Airsoft, and Pellet Guns
Topic: Steel galvanized pipes as pcp rifle air chamber
Replies: 4
Views: 378

Re: Steel galvanized pipes as pcp rifle air chamber

At pressures that high, I would definitely buy something rated for it. I'd be too paranoid to enjoy using the thing. Aren't those galvanized steel caps casted? I don't like the idea of casted, crappy threads. If I was designing a hand-held device for 1500psi I'd actually design it for like 10,000psi...
by Moonbogg
Wed May 04, 2022 2:25 am
Forum: Hybrid Cannons
Topic: Hybrid pumped weapon project
Replies: 10
Views: 660

Re: Armadas 1500 II (hybrid pump rifle)

That is really clean and very nice. I love that it's a hybrid. So awesome. Nice job!
by Moonbogg
Sun Apr 03, 2022 7:39 pm
Forum: Pneumatic Cannons
Topic: Food Mold-Gas pneumatic build
Replies: 6
Views: 907

Re: Food Mold-Gas pneumatic build

Lasagna cannon fired while in oven.
by Moonbogg
Sat Apr 02, 2022 5:35 pm
Forum: Pneumatic Cannons
Topic: Food Mold-Gas pneumatic build
Replies: 6
Views: 907

Re: Food Mold-Gas pneumatic build

It was an April fools joke. Teehee
by Moonbogg
Fri Apr 01, 2022 2:57 pm
Forum: Pneumatic Cannons
Topic: Food Mold-Gas pneumatic build
Replies: 6
Views: 907

Food Mold-Gas pneumatic build

I'm nearing the design completion of a mold-gas pneumatic build. It has a larger than typical pressure chamber and a large cleanout-style threaded plug at one end. You fill the chamber with sourdough bread starter and cheese and wait for gasses to build then fire the cannon. I know the rate of fire ...
by Moonbogg
Tue Mar 29, 2022 9:11 pm
Forum: Pneumatic Cannons
Topic: Throwbag Cannon
Replies: 7
Views: 1129

Re: Throwbag Cannon

PVC vs ABS crush test


PVC air pressure failure


ABS air pressure failure


ABS wins.
by Moonbogg
Mon Mar 28, 2022 2:51 pm
Forum: Pneumatic Cannons
Topic: Looking for design feedback
Replies: 1
Views: 404

Re: Looking for design feedback

It looks good to me. Keep us updated!
by Moonbogg
Mon Mar 28, 2022 2:45 pm
Forum: Pneumatic Cannons
Topic: A bit of Nerf fun
Replies: 4
Views: 739

Re: A bit of Nerf fun

300fps is at the upper end of hardcore nerf performance. That's awesome.
by Moonbogg
Wed Mar 23, 2022 7:05 pm
Forum: General How-To & Discussion
Topic: tennis ball gun for my dog
Replies: 8
Views: 967

Re: tennis ball gun for my dog

Yeah I'd just buy one of those things for sure.
by Moonbogg
Tue Mar 08, 2022 10:24 pm
Forum: General How-To & Discussion
Topic: tennis ball gun for my dog
Replies: 8
Views: 967

Re: tennis ball gun for my dog

Anatine Duo wrote:
Mon Mar 07, 2022 11:44 am
How does your dog aim it?
Come on man. That's not what he meant and you know it. He said "tennis ball gun for my dog", so clearly what he's looking for is a gun made out of tennis balls that he will launch his dog from.
by Moonbogg
Fri Mar 04, 2022 1:58 pm
Forum: Combustion Cannons
Topic: GoldGolfBallGun Progress
Replies: 1
Views: 410

Re: GoldGolfBallGun Progress

It looks beautiful! Excellent job.
by Moonbogg
Fri Nov 19, 2021 2:40 am
Forum: Pneumatic Cannons
Topic: Designing a inline piston pressure regulator - Fluid statics math model
Replies: 19
Views: 3857

Re: Designing a inline piston pressure regulator - Fluid statics math model

You can use X-shaped o-rings to reduce friction. I use them on my piston with standard o-ring compression and I can easily move the piston by pushing it with one finger.
by Moonbogg
Wed Nov 10, 2021 2:32 pm
Forum: Pneumatic Cannons
Topic: Designing a inline piston pressure regulator - Fluid statics math model
Replies: 19
Views: 3857

Re: Designing a inline piston pressure regulator - Fluid statics math model

Personally, I have only made hybrid cannons and I never had to understand how a pressure regulator works, so I don't know how a pressure regulator works. The ignorance isn't by accident. When I can, I let the rest of the world do the thinking and heavy lifting for me. The pistons in a hybrid are ver...
by Moonbogg
Tue Nov 09, 2021 6:02 pm
Forum: Pneumatic Cannons
Topic: Designing a inline piston pressure regulator - Fluid statics math model
Replies: 19
Views: 3857

Re: Designing a inline piston pressure regulator - Fluid statics math model

That's a lot of work to go over. Not sure you'll get many bites to be honest.
by Moonbogg
Mon Nov 08, 2021 7:09 pm
Forum: Pneumatic Cannons
Topic: Air Cannon Design Help
Replies: 4
Views: 1184

Re: Air Cannon Design Help

Download GGDT (gas gun design tool) and use it to model the cannon's performance. Look around in the pneumatic cannon section for design ideas. I'd imagine a piston cannon would be a good choice. Air is thick and soupy, so a large enough piston is needed to avoid choking the thing off, maybe around ...