Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 47 users online :: 2 registered, 0 hidden and 45 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Google [Bot], Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Educated guess on burst pressure

Post questions and info about hybrid (compressed gas with fuel) powered cannons here. This includes discussion about fuels, ratios, ignition systems, build types, safety, and anything else relevant.
Sponsored 
  • Author
    Message

Educated guess on burst pressure

Unread postAuthor: FishBoy » Mon Dec 15, 2008 8:10 pm

Ok, I was looking at burst disk material for my hybrid (should be done in 1-2 weeks, exams slow things a lot), and I thought the sides of a 1 gal. jug of tropicana OJ looked pretty good. I'm pretty sure it's HDPE plastic, and it's slightly thicker than the plastic of a milk jug. The union it will be in is .75". So, any ideas on burst pressure?
  • 0

"You polish a turd, it's still a turd"

Remember DYI!!!
User avatar
FishBoy
Colonel
Colonel
 
Posts: 575
Joined: Tue May 27, 2008 5:51 am
Reputation: 0

Unread postAuthor: mark.f » Mon Dec 15, 2008 8:17 pm

  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3464
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Unread postAuthor: FishBoy » Mon Dec 15, 2008 8:24 pm

Well, that tells me that milk jugs will work for 2x, so I can deduce that the OJ (simpson) will work for 3-4.

However, I was kinda hoping for a more definitive answer from someone (like you) who knows a lot about this stuff.

BTW- is NeoSpud still in the hobby?
  • 0

"You polish a turd, it's still a turd"

Remember DYI!!!
User avatar
FishBoy
Colonel
Colonel
 
Posts: 575
Joined: Tue May 27, 2008 5:51 am
Reputation: 0

Unread postAuthor: mark.f » Mon Dec 15, 2008 9:12 pm

Yes, he still is.

I don't know the exact burst pressure, but it should work for a lot higher than 3x mixes.
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3464
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Unread postAuthor: FishBoy » Mon Dec 15, 2008 9:39 pm

kk, thanks a lot

-is he on spudfiles?
  • 0

"You polish a turd, it's still a turd"

Remember DYI!!!
User avatar
FishBoy
Colonel
Colonel
 
Posts: 575
Joined: Tue May 27, 2008 5:51 am
Reputation: 0

Unread postAuthor: Gippeto » Mon Dec 15, 2008 10:04 pm

  • 0

"It could be that the purpose of your life is to serve as a warning to others" – unknown

Liberalism is a mental disorder, reality is it's cure.
User avatar
Gippeto
Donating Member
Donating Member
 
Posts: 2393
Joined: Sat Jan 19, 2008 10:14 am
Location: The Great White North...Canada eh!
Reputation: 11

Unread postAuthor: SpudBlaster15 » Mon Dec 15, 2008 10:56 pm

If you know the union diameter, and the tensile strength and thickness of the disk, it is easy to approximate the burst pressure.
  • 0

People should not be afraid of their governments. Governments should be afraid of their people.
User avatar
SpudBlaster15
Major General
Major General
 
Posts: 2385
Joined: Wed Oct 18, 2006 11:12 pm
Location: Canada
Country: Poland (pl)
Reputation: 3

Sponsored

Sponsor
 


Return to Hybrid Cannon Discussion

Who is online

Registered users: Google [Bot], Yahoo [Bot]

cron
Reputation System ©'