Hi, I want to make a hybrid cannon, but out of PVC, Ive heard of the danger of ing polyvinlychloride, But I was pre planning, a 2inch schedule 80 or even 120. I looked at the pressure rating of a Schedule 80 2 inch chamber, and its rated clear up to 420, yet the 2.5inch chedule 80 is 470 ? kinda wei...

Hi everyone, I had a little build I have been running off Hgdt for a few months, Havent had the money to get around to build it, Its Advanced, And Im hoping to push a 1 ounce projectile close to 900fps. 4 inch X 22 inch Schedule 40 PVC. A 2inch X 90inch barrel pvc barrel Metered MAPP gas system, 4 i...

I tested something with some chemicals and I stumbled across a way to make hydrogen with two easy to get chemicals. Drano in crystal form, a glass bottle, some aluminum foil, and a little bit of water. Put the aluminum in the bottle, poor the drano ( key ingedrient, Murioutic Acid) into the bottle, ...

Yeah I know this thing could blast through 3 layers cause I have a mini that blasted through 3 layers .5 inch in diamter...... you probably wont belive it but it did as it blew in half lmao. BUT it did go through.

Im going to have photos tommorow if I can borrow a friends camera. Ive already spent 40 on this..... 4 inch pvc parts are expensive, the total price of this gun is about $110

Hey Jmeyer I think ur work is excellent and I love ur cannon, mines being built like urs just a bit smaller at 301.6 ci

I dont think its a union actually. ahah i used a male adapter and a female adapter, I wrapped the alluminum over the male adapter and screwed it into the female....hehehehehe ..... lol and I already have the spark strip built, my idea was that if 3 sparks is good then more is better giving more of a...

Im sorry, its a advanced..... 3 layers should only be around 50 psi. I think it would be able to clear it. Hgdt says there will be 106 psi built in the chamber so im betting there will be atleast 50 being built. And the threads thing, its airtight, I cant blow air past it. and I tried till my face w...

Well Im putting together my biggest advanced combustion cannon, its a 4 inch chamber about 24 inches long, with a 10 foot barrel for a .8:1 ratio. I bought the threaded end coupler and a ball valve, just need to get from a 4-2 in reducer to the 1.5 inch ball valve. This costed me $22 so I didnt have...

well I might be interested in trying one of ur ideas....... lol

yeah thats what I thought ?

Hows that starman ?

Is there a way that I can have a splittable barrel ? delete

What about no projectile ?, would it be a sound maker ? or should I just forget the multiple burst disk idea lol

I understand how a burst disk works, I might have not been clear enough in my post what I mean is, One the first layer is broke that would begin moving the proectile, now the pressure is at the second burst disk and the projectile is at the second burst disk, now it has to overcome the second obstal...