I missed this before. This gun is awesome. Legit full auto rather than a constant airflow with a tube stuck in the middle of a container full of BBs.

Yes, i was quite sure you would be the one to point it out. It is awesome to see users from 2008 still active! You could probably also give me some insight on the benefits of pulling a vacuum in the barrel, as you seem to have tested everything.. I know of those ping pong vacuum cannons reaching 860...

I like the way it shoots. It has enough energy, apart, ideal for hunting pigeons or something like that. I'm looking at the mechanism, to understand.

This is a simple pneumatic mechanism I made. Just uses a 3 way roller mechanical valve and a QEV. I need ideas on a working bolt so if you have any plz lmk.
https://www.youtube.com/watch?v=giUCB2LV_QM

This works really well I built it into my single shot airsoft Made the piston from a 6mm bolt and a piece of nylon

Hi i am new to this great site. Been launching golf balls and other projectiles for years now by other means other than air and have got back into pneumatics again, so i have quite a few questions to ask. As a safety rule myself i only deal with metal valving piping and pressure chambers , as i am a...

I have a dive pony or buddy bottle about .6 in size, i was wondering how many 200psi fills i can get out of it, may be worth the effort to get it up and running.

Testing an idea I had for a semiauto tube fed gravity feed and it seems to work, air goes up into the magazine and pushes the balls back up the tube because of a small amount of air bleeding out of the top of the tube, when the pressure builds up enough the front ball pops out like a cork as there i...

This system worked perfectly for me, which is what makes 25 bb's of lead rise, caliber .22 in my replica of MAC 11. https://www.spudfiles.com/viewtopic.php?f=29&t=26856I used a small flow regulator to regulate the amount of air that rises through the tube that it keeps ammunition. What I don't like ...

Hi guys, i'm presenting to you my new project : a hybride canon that will shoot 16mm glass BBs (kids toys ones), at 10 bars pre-pressure (~150PSI) for the first tests, and eventually, up to 300PSI Chamber will be made in steel, with a welded plug, canon will be a copper tube, 3 points flash ignitor,...

Hi guys! does anybody still have a valid link to HGDT calculator? or could put it back online? Many thanks in advance! I'm currently building an hybrid which will shoot 16mm glass bbs (kids toys ones) between mix 8 and mix 16, and I would like to have simulations of the max pressure of the chamber, ...

Moonbogg wrote: ↑

Thu Apr 22, 2021 2:29 pm

150-300psi pre pressure is what, 10-20x roughly? Definitely use steel for everything. Other than that, it looks pretty nice!

Yes, between 10 and 20x

Nice. Comme dit hector, le cuivre ne risque pas d'aimer cette utilisation. Tube acier sans soudure Ø20, ep2 te donnera Øint de 16mm, ce n'est pas trop cher - https://lamtechno.com/tube-acier-de-precision-e235n-rond-sans-soudure-cintrable/90-381-tube-acier-sans-soudure-cintrable-diametre-20.html#/23-...

The gun looks nice, in general. How do you plan to measure the air-fuel mixture? On the other hand, keep in mind that the copper barrel is not very solid at 300 psi, and it is under high pressure ... if you can get a tube of steel, that is better. I have tried it with a 7X hybrid copper tube, in .25...