Search found 1572 matches

by Moonbogg
Sat Sep 14, 2019 1:40 pm
Forum: Pneumatic Cannons
Topic: A look inside the "bleacher reacher" t-shirt launcher
Replies: 13
Views: 4415

Re: A look inside the "bleacher reacher" t-shirt launcher

Aluminum piston? Maybe there is a dashpot/air cushion effect preventing a hard slam. That's interesting. And a metal to metal seal. That's also interesting. Those are two things I would never consider to try, yet they work.
by Moonbogg
Fri Sep 13, 2019 5:45 pm
Forum: General How-To & Discussion
Topic: "In the world of spuds today"
Replies: 2411
Views: 137157

Re: "In the world of spuds today"

I had a spring-piston air rifle a long time ago and I thought I'd oil the spring inside to keep it fresh and healthy, so I dropped some oil right inside the air port. I was surprised when I shot the thing because it made a loud crack, smoked a little and the shot seemed more powerful than normal, lo...
by Moonbogg
Fri Sep 13, 2019 5:02 pm
Forum: Pneumatic Cannons
Topic: A look inside the "bleacher reacher" t-shirt launcher
Replies: 13
Views: 4415

Re: A look inside the "bleacher reacher" t-shirt launcher

Thanks for showing that. That's a really great design. I love the short piston travel and front-mounted configuration of the piston housing because that preserves chamber volume. I tried to design my last cannon that way years ago when I first started thinking about a piston hybrid design, but I cou...
by Moonbogg
Fri Sep 13, 2019 9:05 am
Forum: Pneumatic Cannons
Topic: A look inside the "bleacher reacher" t-shirt launcher
Replies: 13
Views: 4415

Re: A look inside the "bleacher reacher" t-shirt launcher

What does the chamber look like on these things? I suppose you might get in trouble for uploading a paint drawing of how this thing works?
by Moonbogg
Sat Sep 07, 2019 1:59 pm
Forum: General How-To & Discussion
Topic: New Guy
Replies: 10
Views: 2084

Re: New Guy

^ Good eye on the rich mix soot. I wish people would include details when showing a video of something exploding that wasn't supposed to explode. Although they did look like they were about 15 years old, so I suppose we get what we get. I certainly wouldn't expect my 15 year old self to be smart eno...
by Moonbogg
Fri Sep 06, 2019 9:42 pm
Forum: General How-To & Discussion
Topic: New Guy
Replies: 10
Views: 2084

Re: New Guy

To be fair, that explosion didn't sound like propane and air to me. It sounded really sharp (and highly energetic), which is something you often get with oxygen added. Also, the inside of the pipe was black, so that didn't look typical either. I could be wrong though since I wasn't there. On the oth...
by Moonbogg
Thu Sep 05, 2019 10:28 am
Forum: General How-To & Discussion
Topic: New Guy
Replies: 10
Views: 2084

Re: New Guy

Welcome! Those are some amazing plans. A lot of work involved, that's for sure. Your changes seems fine to me. Keep us posted on your progress and good luck!
by Moonbogg
Fri Aug 23, 2019 6:42 pm
Forum: Hybrid Cannons
Topic: Two-stage hybrid
Replies: 32
Views: 5158

Re: Two-stage hybrid

Whoa, this thing is complicated. Would be so awesome if it worked!
by Moonbogg
Mon Aug 19, 2019 7:56 pm
Forum: Hybrid Cannons
Topic: Timing a Piston Valve Hybrid Cannon and Barrel Material
Replies: 3
Views: 1135

Re: Timing a Piston Valve Hybrid Cannon and Barrel Material

A hybrid piston's opening pressure is determined by how much air pressure you pump behind it. I'm more interested in how you are matching the shape of that egg so perfectly that it won't break upon firing. The sabot has to match the contour of the egg perfectly, right? Otherwise it breaks upon firin...
by Moonbogg
Sun Aug 18, 2019 1:14 pm
Forum: Hybrid Cannons
Topic: Two-stage hybrid
Replies: 32
Views: 5158

Re: Two-stage hybrid

I'm enjoying this thread. I like the input from a variety of people. Reminds me of the good old days when the forums were more active and people got excited about new ideas. I hope this things works. Might I suggest safety glasses, some thin leather gloves and perhaps a safety T-shirt...
by Moonbogg
Sat Aug 17, 2019 2:28 pm
Forum: Pneumatic Cannons
Topic: spool valve design. primary intention: paintball
Replies: 3
Views: 583

Re: spool valve design. primary intention: paintball

That's a really clever design. I like it! Nice work as well. Very interesting.
by Moonbogg
Fri Aug 16, 2019 10:00 pm
Forum: Hybrid Cannons
Topic: Two-stage hybrid
Replies: 32
Views: 5158

Re: Two-stage hybrid

That all makes sense. I can see the convenience of doing this to enable more power. It would be a real innovation in this hobby if you made something like this. I don't think I've ever heard of one before and certainly haven't seen one.
by Moonbogg
Fri Aug 16, 2019 9:55 pm
Forum: Pneumatic Cannons
Topic: Battery Gun
Replies: 7
Views: 659

Re: Battery Gun

I just watched it. It's awesome. It slings a battery pretty damn fast. Nice work.
by Moonbogg
Fri Aug 16, 2019 5:50 pm
Forum: Pneumatic Cannons
Topic: Battery Gun
Replies: 7
Views: 659

Re: Battery Gun

One of my first launchers was a battery launcher. I used sprinkler valves with battery operated solenoids. Performance was garbage, but it was fun. It was a fun thing and you also have a fun thing. I'd like to see yours work.
by Moonbogg
Fri Aug 16, 2019 5:45 pm
Forum: Hybrid Cannons
Topic: Two-stage hybrid
Replies: 32
Views: 5158

Re: Two-stage hybrid

Predicting it's behavior would be complicated and difficult, but I can see this possibly working. It's funny to see this because I had a similar idea except I thought about using a hand crank to compress the chamber B side. A gear reduction and a worm gear or ACME thread with a piston to compress th...