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 65 users online :: 3 registered, 0 hidden and 62 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

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

The Team
Administrators
Global Moderators
global_moderators.png CS

what pressures will glass withstand

A place to ask general spud cannon related questions.
Sponsored 
  • Author
    Message

what pressures will glass withstand

Unread postAuthor: i learn quickley » Thu Jul 06, 2006 10:27 pm

i have a glass blower for a friend and i wanted to know at what thickness will glass withstand the force of the average explosion also he can thread the glass for me wth a awsome tool any way heas going to make my chammber and barell all one peace and thread me an end cap also can any one recomend a good barrell to combustion chamber ratio thank you all for your time to read this post on a side note heas going to heat the glass and thread the bolts in coolist thing ive ever seen he showed me how he was going to do it thanks agin
  • 0


i learn quickley
Private
Private
 
Posts: 3
Joined: Sat Jul 01, 2006 11:14 pm
Reputation: 0

Unread postAuthor: Atlantis » Thu Jul 06, 2006 10:46 pm

So basically you want to make a glass cannon, just those words alone scares me. I suggest you make it pretty thick, the threads will probably shatter also. You should be very careful with a glass chamber, if a light coat of gasoline on the inside will blow up the bottle, I think hairspray might as well. There really isn't a way to know without testing. Be careful.
  • 0

"There isn't a problem in the world that can't be solved by the proper application of explosives"
User avatar
Atlantis
Brigadier General
Brigadier General
 
Posts: 955
Joined: Sat Sep 03, 2005 10:26 pm
Location: Florida
Reputation: 0

Unread postAuthor: Urban Ninja » Thu Jul 06, 2006 11:56 pm

I wouldnt really trust a glass cannon. If its really thick I guess you can get away with it, but I wouldnt personally try it. Also the more movable and removable parts on it, the more likely something is gonna go wrong. You should consider that in the design. It will look an amazing cannon when finished just be carefull.
  • 0

Image
To Be Feared If Not Respected
http://www.freewebs.com/urbanmisfits
Vote for Killagorilla99 AKA KillaSuperHumanRabbitOnCrackx99
User avatar
Urban Ninja
1st Lieutenant
1st Lieutenant
 
Posts: 297
Joined: Sun Jan 01, 2006 5:35 am
Location: Sydney Australia.
Reputation: 0

Unread postAuthor: Rambo » Fri Jul 07, 2006 12:13 am

The glass (beer)bottles are made for presure not less then the coke bottles>the prsure rating is much more then what a combustion can make.I don't see big diferesne between pvc shrapnels and glass shrapnels.I had no problems with SQUARE shape glass botle.
  • 0

User avatar
Rambo
Colonel
Colonel
 
Posts: 509
Joined: Sun Jan 15, 2006 2:07 pm
Reputation: 0

Unread postAuthor: Urban Ninja » Fri Jul 07, 2006 1:09 am

I would just feel worried about having glass flying everywhere, as glass can be razor sharp. Also you couldnt use it cold temperatures, glass is very brittle in the cold. You should try it and tell us how it goes.
  • 0

Image
To Be Feared If Not Respected
http://www.freewebs.com/urbanmisfits
Vote for Killagorilla99 AKA KillaSuperHumanRabbitOnCrackx99
User avatar
Urban Ninja
1st Lieutenant
1st Lieutenant
 
Posts: 297
Joined: Sun Jan 01, 2006 5:35 am
Location: Sydney Australia.
Reputation: 0

Unread postAuthor: saladtossser » Fri Jul 07, 2006 1:52 am

i think i have a solution that will be safe and look cool

get clear pvc, and put the glass on the outside...
  • 0

"whoa... I thought pimpmann was black..."-pyromanic13
User avatar
saladtossser
Brigadier General
Brigadier General
 
Posts: 1234
Joined: Sat Mar 26, 2005 10:40 am
Location: Toronto
Reputation: 0

Unread postAuthor: Benny » Fri Jul 07, 2006 2:24 am

Stupid, Stupid idea.
NEVER put pressureised gas into galss bottles.
  • 0

Join the spudshot forum!!!!!

F*ck the bunny... i got a fishy ><>

Benny
Brigadier General
Brigadier General
 
Posts: 844
Joined: Wed Apr 19, 2006 8:21 pm
Location: Tasmania, Australia.
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: carlbelcher » Fri Jul 07, 2006 4:57 am

Glass is not used any very many pressure applications for a very good reason. It is an extremely brittle materiel. Even if a glass bottle does withstand the force of the exploding gas, it may only do it once. In fact your cannon might blow up the first time you fire it, or it might blow up the hundredth time, you just don't know. Plus it's not going to give you any warning that it's about to explode. There is only one thing that is certain with glass, IT WILL EXPLODE AT SOME POINT!
  • 0

Is your Google.com Broken?!
User avatar
carlbelcher
Donating Member
Donating Member
 
Posts: 532
Joined: Mon Jun 12, 2006 6:54 pm
Reputation: 1

Unread postAuthor: LucyInTheSky » Fri Jul 07, 2006 11:27 am

Wow i was just thinking about that on my way home from school, but then remembered that i dont even like using pvc nevermind glass.
  • 0

User avatar
LucyInTheSky
1st Lieutenant
1st Lieutenant
 
Posts: 293
Joined: Fri Apr 21, 2006 11:46 am
Reputation: 0

Unread postAuthor: CpTn_lAw » Fri Jul 07, 2006 12:00 pm

in a champain bottle, the pressure gets to 6 bars (90 psi).....but, i wouldn't try to pressurize it myself.....use clear pvc if you want to see the inside....
  • 0

User avatar
CpTn_lAw
Brigadier General
Brigadier General
 
Posts: 987
Joined: Sun Sep 11, 2005 9:10 am
Location: France
Reputation: 0

Unread postAuthor: Mihlrad » Fri Jul 07, 2006 12:48 pm

DO NOT USE GLASS, I remember in chemistry class, we did this lab where we had to extract pure hydrogen gas from water, and to test if we had pure hydrogen in a beaker, we put a burning splint to it. The teacher did this part for safety reasons, when he did it, the force was enough to crack the glass slightly. Also, if for some stupid reason you are brave enough to do this, please reframe from winter use. Not only does glass get brittle in winter, but combustion = heat, the glass will heat up, and if you happen to touch the heated glass to the snow or something, it will break.
  • 0

User avatar
Mihlrad
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 467
Joined: Tue May 23, 2006 6:45 pm
Reputation: 0

Unread postAuthor: singularity » Fri Jul 07, 2006 1:19 pm

well if you do use glass remember to cover it in tape, like the lights on some race cars, it will prevent shrapnel well might not stop all of it atl east it will make less if not anything else. although covering it in tape may defeat the purpose (seeing the explosion) it will make it safer to a degree. As said above glass is brittle it is very easy to break, when using conbustion cannons the instatanious shock of the explosion might brake it the first time you fire it.
  • 0

User avatar
singularity
Brigadier General
Brigadier General
 
Posts: 982
Joined: Mon Jun 26, 2006 10:53 pm
Location: someplace
Reputation: 0

Unread postAuthor: Rambo » Fri Jul 07, 2006 1:47 pm

it may only do it once...IT WILL EXPLODE AT SOME POINT!/heated glass to the snow or something, it will break....
In my opinion these are words of people with no experiance with glass.I see no craetivity in this thread.Don't tell things you can't prove.My first auto combustion uses FLAT BOTTOM(more then 2" diametar) glass bottle.Sometimes I fired it with 2X O2 rich mix and no problem after so many shots with glases ofcourse.
  • 0

User avatar
Rambo
Colonel
Colonel
 
Posts: 509
Joined: Sun Jan 15, 2006 2:07 pm
Reputation: 0

Unread postAuthor: alex bennett » Fri Jul 07, 2006 5:35 pm

If it was me I would have it built and never launch anything out of it...just have it too look cool, and it will. Of course you can hit it with some alcohol and use it as a flame thrower, thats as far that I would push it. I agree with Rambo, but this is homemade, any imperfection in the glass will be a weak point.
  • 0

a friend will bail you outta jail,
a good friend will be right next to you saying "damn last night was awsome!"
User avatar
alex bennett
Master Sergeant
Master Sergeant
 
Posts: 155
Joined: Mon Mar 06, 2006 7:13 pm
Location: Jacksonville florida!
Reputation: 0

Unread postAuthor: carlbelcher » Fri Jul 07, 2006 5:41 pm

2X in a glass bottle

That sounds like asking to be ripped to shards by near supersonic shards of glass but that's just MY opinion!

PVC is risky enough, but if you are into large lacerations and hemorrhaging glass is the way to go.
  • 0

Is your Google.com Broken?!
User avatar
carlbelcher
Donating Member
Donating Member
 
Posts: 532
Joined: Mon Jun 12, 2006 6:54 pm
Reputation: 1

Next

Return to General Spud Cannon Related

Who is online

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

Reputation System ©'