When you put the chamber under the barrel it's a more compact design but the elbow or tee connecting them becomes a weak point, with PVC it's better to have the chamber in line with the barrel. I am so excited ohmygosh only a couple more weeks Enthusiasm is fine but don't let it stop you from doing...

That is so awesome, I would never have dreamed of that much power!! I know it seems inferior to all you welding machinists, but it is more than I would have dreamed of!! Hot gas and the instant "valve" certainly gives hybrids the edge when it comes to raw power. Don't forget that with great power c...

No worries, I went head and ran more typical numbers and as you can see with a 4 inch long potato slug you'll have the same energy as a .44 Magnum :D Note also that peak pressure does not exceed 250 psi, well within the limits of the materials if correctly put together . hgdt2inchhybrid.jpg That is...

Here's an HGDT simulation of a 3 inch chamber hybrid at 3X where the burst disc is too strong and doesn't burst, a worst case scenario giving you maximum chamber pressure: hgdt3inch.jpg As you can see, it maxes out at 330 psi. Schedule 80 PVC has a burst pressure of 1200 psi and working pressure of...

I would personally avoid playing with oxygen altogether. For a pressurized 2X hybrid all you would need to do is add a schrader valve somewhere and use a barrel coupling that will take a burst disk. So if I am switching the design to a Hybrid, is it safe if it is a handheld Sch 80 PVC Hybrid withou...

"Do yourself a favor and go with a better construction material." I would like to, but my planned budget doesn't exceed 200$ and I simply don't have the tools and skills to work with metal, and definitely not enough cash to hire a machinist. I don't want to make a Hybrid just yet, but I don't want ...

I am planning on making a Sch 80 PVC Combustion Cannon with a 3 inch chamber at the start of the Summer, and am not satisfied with the currently projected power. If I inject 20% of the Chamber's Volume in Oxygen, and then 8.6% Propane, will that be equal to a 2x mix in a Hybrid? I understand that at...

And just an idea, maybe you can also test the effects of a simple muzzle brake and how it compares to barrel porting.

Holy shit that's cool! Sure does have a nice sharp report! Two questions; one you said you were using ABS, does some ABS come pressure rated? I wouldn't fancy having that rupture with your cheek pressed against it! The second question is how did you seal the bolt action mechanism? I have a general g...

Does Spudfiles have a Facebook page/group ? or am I just not finding it ? seems to be the thing to have nowadays. :idea: PC Guy should make an Instagram account, it would definitely reach a broader audience as when the moms moved into facebook and grandma started friend requesting we were outta the...

:violent3: Hi, I am a new user on the forums but I have been reading the forums for several months now anonymously. I have made three cannons before, unfortunately sticking with hairspray and bbq ignition in all of them. It is the cross I must bear :cry: After discovering the cult of spudders on the...