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Hydrogen spud gun

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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Unread postAuthor: cannon freak » Sat Nov 18, 2006 2:30 pm

What if you just painted it.



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Unread postAuthor: drac » Sat Nov 18, 2006 2:49 pm

It happens on the inside of the pipe, and I'm pretty sure that the heat from repeated combustions would destroy the paint leaving the metal once again vulnerable.
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Unread postAuthor: judgment_arms » Sat Nov 18, 2006 7:43 pm

As I said,
When you fire it yell “FRAG OUT”

Say aren’t pipe bombs illegal….
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Unread postAuthor: sergeantspud2 » Sat Nov 18, 2006 11:35 pm

What about galvanised? There is like a coat of zinc(?) or something.
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:D Always rely on Murphy's Laws :D
4.If you have enough grease & a big enough hammer, you can put anything... anywhere
3.If all else fails, hit it with a big hammer
2.Matter will be damaged in direct proportion to its value
1.If anything simply cannot go wrong, it will anyway
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Unread postAuthor: ammosmoke » Mon Nov 20, 2006 10:56 pm

Its actuly 2/3Hydrogen to 1/3 0xygen, hence H2O.


Oops, thats what I meant!

I'm not that stupid.

I think.
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Unread postAuthor: zeigs spud » Tue Nov 21, 2006 7:16 pm

drac wrote:I'd say don't do it at all.


yeah..
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Unread postAuthor: spud-tom » Mon Nov 27, 2006 8:41 pm

i have tried it and it is really easy to fire it. But if you put too much, u will blow your self up. I tried putting "too much" hydrogen in it so it would'nt fire, and i was unsuccesfull
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Unread postAuthor: Scope » Mon Nov 27, 2006 10:09 pm

Spud thats because hydrogen lights in some extreme oxygen levels
someone posted it here a few days ago.
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Unread postAuthor: Hayseed_Andrew » Mon Nov 27, 2006 10:20 pm

ya I happen to have a can of hydrogen sitting on my microwave.
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Unread postAuthor: Hayseed_Andrew » Mon Nov 27, 2006 10:22 pm

do you have a method to compress your H or are you just hoping it will end up in your chamber somehow. Hint, it goes right through balloons pretty fast. I's suggest "pouring" it underwater, where you can see it.


P.S. dont smoke while doing this.

PPS if you keep it in a jar, keep the jar upside down, with water in the bottom.
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Unread postAuthor: boilingleadbath » Tue Nov 28, 2006 6:23 pm

Yeah, I don't know who put that up, and I doubt it's veracity.

...My understanding is that embrittlement is a problem for those aiming to store hydrogen pressureized at a few thousand PSI, not for pipe that happen to be exposed te it for a bit.
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Unread postAuthor: HAYLO_Stealer » Tue Nov 28, 2006 7:40 pm

* Note to the moron with the hindenburg*
none of the hydrogen burned in this "Blimp"
the chemicals that where used to coat the fabric of the hindinburg was highly toxic and flamible, so a spark made the coating burst in to flames. When i hold finally idd burn through all the gass ecaped to quickly that the blimp just fell.
Before you open you mouth do some research.
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Unread postAuthor: chaos » Mon Jan 22, 2007 2:39 am

i am going to use this on my new gun electrolysis all the way

C@SE-G
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Unread postAuthor: squeaks » Mon Jan 22, 2007 8:26 am

HAYLO_Stealer, how about you do some research. The skin THEORY is only a THEORY on how the Hindenburg Crashed. The Mythbusters covered this and came to the conclusion that although the skin did create MINOR thermite reactions, the reason the hindenburg blew up and killed everyone was a combination of the skin and hydrogen. I beleive it was probably more on the hydrogen side but they did not test to see which one was more of the cause.
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"Nine out of ten Americans agree that out of ten Americans one will always disagree with the other nine."
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Who's Line is it Anyway

Borrow money from a pessimist, he won't expect it back.

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Unread postAuthor: BC Pneumatics » Mon Jan 22, 2007 9:23 am

First, congratulations are in order for a completely original idea. Bravo.
Now that the sarcasm is out of the way, I need to clear up a few things that people have mentioned:
squeaks- By the time you pay the electric bill, you would have probably been better off using propane.
judgment_arms- Hydrogen isn't what made the Hindenburg go up in flames. It certainly didn't help things, but it would have completely burned either way.
squeaks (again)- As much as I'd love to see you get into a yelling (squeaking?) match about this, I feel I must butt in. Originally the 'skin theory' was thought up shortly after the incident by a female German scientist. Well, the German's didn't want to show any weakness, especially with what was going on in the world. So, it was pretty thoroughly covered up. (Or at the very least, not very well publicized.) Since then, modern scientists have tested the theory, even going so far as to place a piece of the original Hindenburg 'skin' in a Jacob's Ladder. The stuff goes up like a flare. Not to mention that all the personal accounts and recent colorizing of the film suggest that little hydrogen burned, and certainly wasn't the point of ignition. (It is very hard to light a fuel with no oxidizer) The first hand accounts don't even coincide with a leak catching fire, then spreading to the skin.

By the way, these modern scientists, and even the one from the 30's were a lot more though than our favorite TV detectives. Not to mention better informed, educated, and trained in this field.
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