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| Spudgun on Crack |
 Posted: 06/23/2007 21:56 PM Post subject: The Simplest Hybrid |
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Corporal
Joined: 23 Jun 2007
Posts: 79
322.13 Spud Bux
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Ok i have built a standard combustion cannon and i am working on a pneumatic cannon at the moment, but could someone tell me how to build a soda bottle hybrid, do you just inject propane and them pump air into it?
And as for the burst disk what do you use? |
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| hi |
| Posted: 06/23/2007 22:26 PM Post subject: |
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Major General
Joined: 01 Feb 2007
Posts: 1456
1019.01 Spud Bux
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do not, i will repeat that, do not use a soda bottle for a hybrid. its dangerous enough to use it as a pneumatic.
it will simpley explode in your face.
hybrids build up 300+ psi, way more than any soda bottle will ever take.
take my advise and wait a little before you build a hybrid. i built over 10 cannons before i built a hybrid. they really are dngerous.
you idea is correct, you add more propane than you would in a combustion and to make up for the lack of oxygen, you add air. burst disks are made of anything really. i use aluminum foil, cut up soda bottles, any thing that will hold 30 psi or so. |
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| Acdcmonkey1991 |
| Posted: 06/23/2007 23:06 PM Post subject: |
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Donating Member
Joined: 30 Mar 2007
Posts: 389
393.93 Spud Bux
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Btw, how much does aluminum hold, I'm retarded... 
Also, hi is right wait before you build a hybrid, or just don't build one at all. |
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| hi |
| Posted: 06/23/2007 23:31 PM Post subject: |
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Major General
Joined: 01 Feb 2007
Posts: 1456
1019.01 Spud Bux
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it depends on how thick the aluminum is.
thats like saying how long can you hold your breath. well that really depends on how much air you take in. |
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| boilingleadbath |
| Posted: 06/24/2007 11:19 AM Post subject: |
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Moderator
Joined: 12 Mar 2005
Posts: 1647
5491.22 Spud Bux
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One can run a 1.1x mix in a hybrid, which would produce scarcely more pressure than a normal combustion.
Following this line of reasoning, if normal combustions using a soda bottle as a chamber are safe, there is a hybrid mix which is also safe to use them.
However, the question becomes weather or not the added hassle and the decreased safety margins are worth a bit of extra muzzle energy. |
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