Need help with burst disc

Harness the power of precision mixtures of pressurized flammable vapor. Safety first! These are advanced potato guns - not for the beginner.
xxnelson18xx
Private
Private
Posts: 3
Joined: Mon Jan 29, 2018 11:58 am

Sun Feb 04, 2018 12:09 am

Hello everyone,

Although this is my first post, I’ve been around spud guns for several years. I’ve built several combustion and pneumatic cannons but recently decided to build a hybrid. I’ve constructed it using sch40 steel pipe and will by placing my burst disc in a 1.5” steel union. I’m wanting to use aluminum foil as my disc material. I don’t have a computer that will run HGDT so I’m hoping someone can helo me out. I’m going to be using a 3x oxy/propane mix but need to know how many sheets of foil to use. So basically, can someone tell me in a 1.5” union “x” number of sheets equals “y” psi burst rating?

Thanks for the help!!
User avatar
Zeus
Staff Sergeant
Staff Sergeant
Posts: 1505
Joined: Tue Oct 27, 2009 7:34 pm
Location: 'Straya, C*nt

Sun Feb 04, 2018 4:48 pm

Short of personal experience, not really. Foil thickness varies from manufacturer to manufacturer. However, you're gonna be looking at a lot. Another option is aluminium barbecue trays, or soft drink/beer cans.

Can you correctly define what you mean by a 3x mix? Will it be pressurised to 3 bar, or are you using 3 times more fuel than a standard air/fuel mix.
/sarcasm, /hyperbole
xxnelson18xx
Private
Private
Posts: 3
Joined: Mon Jan 29, 2018 11:58 am

Sun Feb 04, 2018 8:49 pm

I will be using 3x more fuel then will pressurize the chamber to 3 bar
User avatar
Zeus
Staff Sergeant
Staff Sergeant
Posts: 1505
Joined: Tue Oct 27, 2009 7:34 pm
Location: 'Straya, C*nt

Mon Feb 05, 2018 6:41 pm

3 bar with oxygen, or air
/sarcasm, /hyperbole
xxnelson18xx
Private
Private
Posts: 3
Joined: Mon Jan 29, 2018 11:58 am

Tue Feb 06, 2018 3:32 am

I will be using an air compressor
Post Reply