Excellent work as always, as I've said privately the fact that you've made it work consistently would be admirable even if looked like a bunch of random parts thrown together, but you've also managed to make it neat and stylish, kudos! The trigger guard integrated in the pump handle is really a nice...

iggy1328 wrote: ↑

Sat Jan 13, 2024 12:23 am

Got a bit too drunk last night, woke up this morning with a new cannon.

I hate it when that happens

I've heard of posting under the influence but this is something else!

With those material specifications it's a shame not to go a little hybrid, even a low mix would be impressive.

That's pretty fast for such old designs!

Welcome! You can download GGDT by following this link

AndyWood wrote: ↑

Fri Dec 29, 2023 6:56 am

I agree with you.

Ironic.

Ok ChatGPT are there any real people left on the internet?

Something like that then: https://www.youtube.com/watch?v=PhGg3MchBMg Good to have the difficult part pre-made :D Will I lose significant power because of the way the barrel swings open? You said it would be lever action, technically the barrel would be fixed - did you mean break-action like a tradi...

Some design studies for a 12 gauge air cartridge

Welcome to the forum! It's a little hard to picture your project without images, and can you link to the valve you intend to use? To my knowledge the "Z" type valves are intended for AirForce Talon/Condor type rifles that have a hammer coaxial with the barrel. If the dimensions you described are wal...

That's basically what they are, catapults where the power comes from something other than torsion.

Anatine Duo wrote: ↑

Tue Dec 19, 2023 10:12 am

Hmmmn just when I thought I had no interest in hybrids

For sheer power there really is no comparison with pneumatics, even with thousands of psi of air and fast valves you will struggle to get the same results.

would love to get a look inside It seems no details are forthcoming from the builder but I'm willing to bet it's a cloud/vortex variation with no moving parts, the performance comes from the fact that he's feeding it with 3000 psi when these things are normally run on shop compressors with 20 times...

Here are some details of the valve, first with o-ring in place and then slide down to show the groove: http://i.imgur.com/Zx2I8Hyh.jpg http://i.imgur.com/17IwsIWh.jpg Also interesting to note the about of wear happening the two areas where the locking balls contact, on the firing pin as well as the ...

For a simple combustion you need a decent spark gap, in my experience around 6mm when using piezo igniters. How are you metering your fuel? Are you using a syringe for the butane?



What are you using as an igniter?

An interesting BBMG project with the pressure ramped up and correspondingly impressive rate of fire: