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| ilovetoblowthingsup |
 Posted: 04/16/2007 19:25 PM Post subject: butane injection system design, need advice on |
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The Suppressor Man
Joined: 30 Mar 2007
Posts: 913
492.67 Spud Bux
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Okay hello all, I have designed a butane injection system for my mini. If you have any questions, feel free to ask, Spudthug, I know you designed a butane injection, tell me what you think of this will you?
Basically how it works is this. A butane canister has a hose attached to nozzle, and that hose is glued not into the needle holder part, but the area around it. A needle or something similar is put into that needle part, and JBWelded into place. I would then JBWeld the needle into the chamber. So to load it you would just press down on the nozzle of the butane can until the syringe fills up to desired amount, then push the plunger down to inject the butane
But my question is this: When I fire it, is there a possibility of somehow, the combustion working its way up the needle (unlikely but possible), then somehow into the hose and into the butane can, possibly blowing that up?? it does not seem very likely at all, but I just want to take all the safety measures that I can. So post your advice and comments, thanks. Here's the diagram, you'll have to expand it to fully see it sorry.  |
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| Hotwired |
| Posted: 04/16/2007 19:28 PM Post subject: |
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UK Spudgunner
Joined: 13 Oct 2006
Posts: 1755
3766.92 Spud Bux
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No.
The bore of the needle is way too small for a flame to travel down |
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| ilovetoblowthingsup |
| Posted: 04/16/2007 19:42 PM Post subject: |
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The Suppressor Man
Joined: 30 Mar 2007
Posts: 913
492.67 Spud Bux
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Okay thanks, I'll try and assemble it this weekend and let you guys know, but first I have to get the mini to actually fire 
K UPDATE/EDIT: I don't have a needle that will fit into my syringe. So I now need to know if a flame from the combustion will travel up the hole of the syringe. The hole is 3/32" thick. Would a flame travel up that hole?????????
anyone else have input on the system????? |
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| FiveseveN |
| Posted: 04/17/2007 8:42 AM Post subject: |
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Captain
Joined: 14 Oct 2005
Posts: 340
766.01 Spud Bux
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if id does, what's the worse that could happen, the syringe's piston popping out?!
Butane is very sensitive to air/fuel ratio; there's no way it could ignite at that concentration anyway. |
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| ilovetoblowthingsup |
| Posted: 04/17/2007 9:02 AM Post subject: |
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The Suppressor Man
Joined: 30 Mar 2007
Posts: 913
492.67 Spud Bux
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haha good point, I suppose that would give before the can would 
I'm stupid
EDIT: But would it though? |
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| Scotty |
| Posted: 05/22/2007 1:12 AM Post subject: |
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Staff Sergeant
Joined: 09 Jan 2007
Posts: 127
303.12 Spud Bux
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| Nah me thinks the pressure in the can would not let it, also it has never happened before that i know of. |
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| jimmy101 |
| Posted: 05/22/2007 12:19 PM Post subject: |
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Major General
Joined: 28 Mar 2007
Posts: 1657
7034.12 Spud Bux
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Your systems sounds about the same as linky #1 and linky #2.
 and 
| Quote: | | ilovetoblowthingsup: But my question is this: When I fire it, is there a possibility of somehow, the combustion working its way up the needle (unlikely but possible), then somehow into the hose and into the butane can, possibly blowing that up?? it does not seem very likely at all, but I just want to take all the safety measures that I can. |
What exactly do you think would happen if the flame did propagate back to the butane can?
What are the two things that are required for combustion?
Are those two things present inside the butane can?
Besides, you still have the butane can's valve between your chamber and the butane don't you? (The link to your diagram doesn't work.) |
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