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hybrid setup

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.
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hybrid setup

Unread postAuthor: trigun » Wed Jan 28, 2009 12:00 am

I want to take a 3" steel pipe plenty thick weld two square plates on the end then put a 1" union for the barrel. On the back i was thinking a 1/2 inch cross. One leads to a psi gauge with bar rating for easy mixing and between gauge and cross a valve to protect the gauge from pressure spike. On the opposing side a female quick connect to inject air and propane with valve to protect it. Straight across from the inlet to chamber a car spark plug. Will this setup be a safe and realiable way to set it up.
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Unread postAuthor: psycix » Wed Jan 28, 2009 9:57 am

As long as everything is welded properly, yes.

Though you should look out for the possibility of DDT when you've got a big chamber running high mixes.
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Unread postAuthor: Big Boom » Wed Jan 28, 2009 11:42 am

Sound good, but a few questions:
1) Do you have any drawings or diagrams?
2) What is the length of the chamber?
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Unread postAuthor: trigun » Wed Jan 28, 2009 5:24 pm

i want to make it roughly two feet long

as for drawings i have planned out detailed drawing but didn't think it was significant enough to post them
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Unread postAuthor: psycix » Wed Jan 28, 2009 6:40 pm

Drawings are always welcome.
Post em. Maybe we have a few notes about the design.
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Unread postAuthor: trigun » Thu Jan 29, 2009 1:06 am

Give me three weeks to get funds and it will be built in one day.
DDT wont occur in a 18" long 2" pipe will it at 6x
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Unread postAuthor: psycix » Thu Jan 29, 2009 8:02 am

Okay good that you found that out. Very well then, I guess I'll see it appearing in the showcase right? :)
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Unread postAuthor: trigun » Thu Jan 29, 2009 4:33 pm

yes it will be in the showcase. It will look a bit different than the sb15? i think it is. But I'm planning on making it hand held and only reason it will take so long is the funds. I'm in high school with all college classes. Lots of hw and to add that on i have hockey 7 days a week. Now im off to hockey !

Edit: build complete. My own spark plug attachment, one fill zone, 1.5" union. Just under 1000ml chamber. Devised unique firing box with camera ignition.
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