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The Pipe Dream: I think it's going to happen

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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Unread postAuthor: D_Hall » Thu May 01, 2008 8:01 pm

markfh11q wrote:Man, you've been looking forward to this a long time D_Halls, I can tell. Is this what got you interested in combustion guns?

Yes, the Pipe Dream is why I'm working in the combustion world these days. I need the hot gases to break Mach. Were it not for that requirement, I'd just make it a Very Large Air Gun.
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Unread postAuthor: D_Hall » Thu May 01, 2008 8:22 pm

And pipes. We have pipes!
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Unread postAuthor: SpudFarm » Thu May 01, 2008 8:28 pm

those pipes does not look suitable for a hybrid.. what is the wall thickness?
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Unread postAuthor: D_Hall » Thu May 01, 2008 8:49 pm

IIRC, it's 1/2" wall. Correct in that it's not much, but then, I'm not planning on putting much through it. It's good to 200 psi with a 5:1 margin. Totally adequate for a 2X gun.
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Unread postAuthor: SpudFarm » Thu May 01, 2008 8:51 pm

just don't "ride" it as Adam did with the chicken gun :D
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Unread postAuthor: starman » Thu May 01, 2008 8:52 pm

D_Hall wrote:
markfh11q wrote:Man, you've been looking forward to this a long time D_Halls, I can tell. Is this what got you interested in combustion guns?

Yes, the Pipe Dream is why I'm working in the combustion world these days. I need the hot gases to break Mach. Were it not for that requirement, I'd just make it a Very Large Air Gun.


Are you finding combustions interesting enough to become a permanent convert? I know (or think anyway) your first love is with pneumatics.
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Unread postAuthor: MrCrowley » Thu May 01, 2008 8:57 pm

@D_Hall

By the looks you have a vast open space to shoot this thing, that means you have a vast open space between you and the cannon...I think you can go more then a 2x :D
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Unread postAuthor: SpudFarm » Thu May 01, 2008 9:00 pm

mrcrowely: mabe it can get DDT
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Unread postAuthor: MrCrowley » Thu May 01, 2008 9:03 pm

You'd probably need 100' of chamber that size to get DDT :P
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Unread postAuthor: SpudFarm » Thu May 01, 2008 9:06 pm

BTW how long is the chambers?
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Unread postAuthor: D_Hall » Thu May 01, 2008 10:18 pm

MrCrowley wrote:By the looks you have a vast open space to shoot this thing,

I have access to a military gun gun range (and I'm not talking about small arms). Ironically, said range is about 1/2 mile beyond the horizon in the "pipes" picture. So yeah, I have vast open spaces available to me.

I think you can go more then a 2x :D

LOL. Yeah, but if the gun WORKS, then I'm a dead man if I push it too far. Too, IF the gun works, it may be a lot easier to get funding for something "nicer" if a need is identified. :)
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Unread postAuthor: D_Hall » Thu May 01, 2008 10:22 pm

spudfarm wrote:BTW how long is the chambers?

10' long. Total volume is on the order of 170 ft^3.
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Unread postAuthor: OuchProgramme » Thu May 01, 2008 11:06 pm

I think you should build a house, and then shoot the 250 pound projectile at it :).


Ultimate damage pic.
I'd pay big money to see it
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Unread postAuthor: bigbob12345 » Thu May 01, 2008 11:14 pm

Mind if you take a pic of the pipe with some other thing for a comparison of size.
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Unread postAuthor: THUNDERLORD » Thu May 01, 2008 11:15 pm

@D_Hall just wondered what type of place you work for? If that's too much information, just don't answer. I am expecting a little $$$$ soon myself and would like to maybe start a company(in the air rifle/ spud cannon business).
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