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first hybrid

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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first hybrid

Unread postAuthor: SpudFarm » Fri Dec 07, 2007 11:52 am

now I am finally got my ass up and start build a hybrid!
the chamber is going to be a 8" long 2" steelpipe and a coil for ignition.
and then to the questions: i are using a standard ball valve to fuel it with air and propane and it isn`t rated that high! and if the valve is going up in flames is it just the sealings or does the whole valve blows up?

and 2nd: i am going to use a 1/2" copper barrel on about 4.5 feet is that just silly small or silly big? i dosent wanna have a loong barrel on it bechause its hard to transport.

last: how big mix would you use it on?

thanks for all answers
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Unread postAuthor: Fnord » Fri Dec 07, 2007 1:10 pm

Brass or steel ball valves are fine to use for hybrids. They are normally rated for 600 psi (like 40 bar) which is probably about the most you'll generate with "sane" mixes.

I have a similar sized barrel for my hybrid, and while it is extremely small in terms of efficiency, it will work fine for power.

People typically use mixes of around 6x in steel hybrids, but if you don't drill into the chamber you should be ok firing 7 or 8x remotely.
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Unread postAuthor: SpudFarm » Fri Dec 07, 2007 5:26 pm

ok! i am thinking of making it handheld and for most 5x mix
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Unread postAuthor: bigbob12345 » Fri Dec 07, 2007 9:16 pm

I would never recomend a handheld hybrid I recomend remote ignition
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Unread postAuthor: MrCrowley » Fri Dec 07, 2007 9:32 pm

bigbob12345 wrote:I would never recomend a handheld hybrid I recomend remote ignition


Handheld hyrbids are perfectly safe, there is at least 3 or 4 of them on spudfiles.
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Unread postAuthor: sjog » Fri Dec 07, 2007 9:58 pm

iare spudfuarm i doznt wan tu llung berrel
i holeinna han iare OK??
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Unread postAuthor: SpudFarm » Sat Dec 08, 2007 7:49 am

sjog WTF are you talking about?
and for bigbob i am going to use it at max 5x so i feel perfectly safe about that, and have you seen the sch 40 steel pipe test?


Edit: here are the "burst test"

http://www.spudfiles.com/forums/viewtop ... 09c7bc7c3b
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Unread postAuthor: DYI » Sat Dec 08, 2007 10:24 am

Sjog is poking fun at your general ignorance, as well as poor grammar and spelling. A bit of research could have answered all of your questions and more. "I are" isn't proper English by any stretch, and it makes you sound retarded.
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Unread postAuthor: Fnord » Sat Dec 08, 2007 10:58 am

Did it ever occur to either of you that English might not be his first language?

He obviously did do some research or he wouldn't be asking about hybrids in one of his first posts.
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Unread postAuthor: SpudFarm » Sat Dec 08, 2007 1:13 pm

yes i am norwegian and i am not shamed of my english! you can try speak norwegian to me and see how many words you can get out of your mouth!

and i ask bechause we haven't the same pipes as in your country we dosent have sch ratings!! and thats the reason that i am going to ask if someone can tell me the wall thickness of a 2" sch 40 steel pipe!
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Unread postAuthor: MrCrowley » Sat Dec 08, 2007 3:21 pm

Sorry about the members making fun of your English, I had a feeling it wasn't your first language but you can speak it pretty well. I know I learn German at school but when I went there I hardly spoke a word :oops:


Anyway, if Norway is like the rest of Europe the fittings could be in Metric, so you'll need to look for 50mm instead of 2" pipe and the pressure rating will probably be in BAR. I'm not familiar with metal pipe as much as PVC but if it doesn't have the rating on it just ask someone.

It could be on a sticker on the pipe saying DN50(50mm diameter) PN25(rated to 25BAR = 362.5 PSI)

You could try PMing a member called 'Brian The Brain'.
He's Dutch but is very familiar with metal pipe in Europe and speaks perfect English, so you could ask him what to look for.
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Unread postAuthor: Novacastrian » Sat Dec 08, 2007 7:30 pm

MrCrowley wrote:
bigbob12345 wrote:I would never recomend a handheld hybrid I recomend remote ignition


Handheld hyrbids are perfectly safe, there is at least 3 or 4 of them on spudfiles.


I agree MrC, i think your estimate of 3 or 4 is a tad short of the real number though, i for instance own two myself :D
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Unread postAuthor: sjog » Sat Dec 08, 2007 9:35 pm

spud farm SORRY I forgot that this is world wide
You'sounded' like a lazy American kid
It would be interesting to see the country name on our posts
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Unread postAuthor: SpudFarm » Sun Dec 09, 2007 10:22 am

thanks crowely!
but the pipe i ordered on the web (norwegian site) is what called black steel pipe (direct translation) and i think it is a seam on it is that a big mistake? and is the pipe that other members use seamless?
and one last question: is a black steel pipe rated lower than galvanized?
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Unread postAuthor: MrCrowley » Sun Dec 09, 2007 4:33 pm

I think most metal pipe people on this forum use does have a seam.
When I was in America I only found seamed galv pipe, which just means if you're making a co-axial you may have some problems with the piston and the seam.

I'm not sure on that one, i'm sure someone else is though.
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