My brother''s design

[Brian the brain]

My brother has gotten interested in gun design recently and came up with a design of his own.
(I recommended he should build a simple piston Tee valve actuated by ballvalve, but he insists in building something "raw")


His design uses a burst disk, a chamber at a lower than burst pressure and a second chamber connected to the first, with holds a lot higher pressure.
He also desperately wants it to be a double barrel ( 75 mm each!!)

Crazy if you ask me

[)DEMON(]

So that would make the combined pressure of the chambers 15 bar?
What is he going to use for the burst disk. I think it is a bit overkill making the barrels 75mm each.

[Benny]

Thats some damn big chambers for two 75mm barrels.
What is 20 bar in PSI?

[trae08]

Im going by this gauge i have. And it says that 10 bar is 145 psi so 20 bar has to be 290 psi wow thats alot. I might be wrong though.

[Benny]

Thanks, that clears it up.
How are you going to get 290 PSI?

[Brian the brain]

With my special high pressure bikepump.The high pressure reservoir will be made of metal and will be slightly smaller.

I agree the barrels are overkill..

I could build him a much better iston valve cannon with a single barrel...but he wants to do it this way...