I am at my friends house using his windows computer for hgdt. Is there a way i can simulate a propane/oxygen mixture?

P.S.: I'm not sure I've ever seen a single post with more questions than that one had... lol well be prepared because i have many more :lol: You may want to take a crack at running it with WINE then I can't seem to understand how to do that... I'm not the most computer savvy person and everything o...

I don't have access to a windows computer so i can't use HGDT:( after seeing what some other people have built, i lean more towards a 4ox mixture and 5 ft barrel. I have also considered creating a a vacuum in my chamber then filling it with pure oxygen and propane. if i was to do a propane/oxygen mi...

Thanks for all the help. JMR: its going to take me a while to read thru that thread but i will when i have the time. How exactly do i use a high voltage ignition system when the gun is made out of metal? it will be difficult because the chamber should be very small. I can't seem to find anything con...

Thanks for all the help! unfortunately, i have to leave this design alone for now due to cost of materials and little space in my garage to store the massive gun

I was thinking of creating a small, all metal hybrid spud gun. Im no expert with hybrids and this would be my first one. The plans are hardly developed, but I plan on using a 4 ft 1/2 inch schedule 80 steel barrel. Is it feasible to fire it at 400 psi? If my calculations are right, that should be ab...

The plan was to have the adaptor screw in to the full 4 inch tee so when removed i could pull the piston out of the 4 inch part. The reason for this cannon is to build one that can shoot almost everything The valve will be housed in a 4 inch t with a 3 inch seat and no 2.5 inch pipe involved edit by...

What harm can restricting the chamber to 3 inches do if the barrel is only 3 inches? the reason i wanted it threaded right out of the tee is for simplicity in the pilot area. It would be a lot easier to make if i didn't need a way to get the piston out of it. the piston could be removed thru where t...

This valve is becoming more complicated then i originally planned. I would like to have threads on the part of the tee that hooks up to the chamber and on the part that the barrel attaches to while keeping the pilot area slip; however, i can't seem to find a 4 inch tee with that configuration. the r...

yes and i haven't found anything for a chamber sealing valve. Most valves made are barrel sealing.

Thank you.
I understand the basic design and operation of a chamber sealing piston valve. Do you know what the best easily available material is to make the piston out of assuming I only have basic hand tools? What about a bumper?

Does anybody have an idea of how i can make a 4 inch piston for a chamber sealing piston valve?