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mini hybrid fail

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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mini hybrid fail

Unread postAuthor: jackssmirkingrevenge » Sun Sep 05, 2010 5:01 am

At least my ears have stopped ringing :roll:

I was testing this hybrid, after a few clicks it ignited at 6x, so I decided to up it to 8x, with a burst disk cut from photo paper.

The good news: it ignited on the first click :D BOOM!

The bad news: the burst disk didn't live up to its name, so the epoxy end cap popped out instead with a tremendous flash :?

If you look at the base, you can see the distortion on the chamber body and schrader valve from where it hit the wall.

Fear not however, I shook myself, nothing fell out, so apart from my slowling returning hearing all is well :)
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edit: found the mangled remains of the ignitor that was taken out of my hand with considerable haste...
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Unread postAuthor: ilovefire » Sun Sep 05, 2010 5:54 am

i have been thinking about making one of these so i guess ill have to take it consideration that it could blow up in my face :lol:
how about if you round the ends inwards? help keep that epoxy plug in!
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Unread postAuthor: inonickname » Sun Sep 05, 2010 5:57 am

Do it again! Do it again!

Except this time maybe drill some holes in the body for the epoxy to lug into. I know you would have roughened it, but it obviously needs moar :D . Maybe think about using some aluminum powder to bulk your epoxy up as well.
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Unread postAuthor: Insomniac » Sun Sep 05, 2010 6:33 am

I think thicker tube with holes drilled near the end, sleeved in another thin tube for the sake of neatness would work well... really give something for the epoxy to grip onto.
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Unread postAuthor: POLAND_SPUD » Sun Sep 05, 2010 6:53 am

I am gonna say just one word -> malleable iron fittings
:D
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Unread postAuthor: jackssmirkingrevenge » Sun Sep 05, 2010 7:01 am

inonickname wrote:I know you would have roughened it, but it obviously needs moar :D


Obviously :roll:

I also think that maybe aluminium tubes taken from the inside of a printer cartridge aren't exactly the most suitable materials for high pressure applications...

Hehe I just realised, look what was wedged in the muzzle! This means that the barrel jammed itself into some part of my furniture at some point, then bounced off! Still can't figure out which of the holes in my furniture it is though :roll:
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Unread postAuthor: Insomniac » Sun Sep 05, 2010 7:29 am

Hunting for Holes with JSR... :D :D
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Unread postAuthor: jackssmirkingrevenge » Sun Sep 05, 2010 7:53 am

lol.

I just keep finding damage, looks like the chamber hit the plastic tray where I keep my ammuition on the way to the wall :roll:
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Unread postAuthor: ilovefire » Sun Sep 05, 2010 8:06 am

would it not be smarter to test the stuff outside maybe? just an idea you know :roll:
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Unread postAuthor: Gun Freak » Sun Sep 05, 2010 8:08 am

Jack you is finna kill yoself.
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Unread postAuthor: jackssmirkingrevenge » Sun Sep 05, 2010 8:10 am

...and let the neighbours know exactly what I'm up to? :D

At least now I have a new found appreciation for the power potential of hybrids, meaning future projects will be constructed with a bit more care :)

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Are you suggesting I should check myself before I wreck myself:D
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Unread postAuthor: jhalek90 » Sun Sep 05, 2010 12:15 pm

jackssmirkingrevenge wrote: Still can't figure out which of the holes in my furniture it is though :roll:


which of the holes? There are multiple holes in your furniture?

you sir, are a true spudder. :shock:
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Unread postAuthor: Gun Freak » Sun Sep 05, 2010 12:17 pm

jhalek90 wrote:you sir, are a true spudder. :shock:

I think we established that a LONG while ago :D
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Unread postAuthor: jackssmirkingrevenge » Sun Sep 05, 2010 1:18 pm

jhalek90 wrote:which of the holes? There are multiple holes in your furniture?


I just did a quick check, there is not a single item of furniture in my room that doesn't have some sort of projectile related hole, and not all of them are accidental :roll:

Currently re-making this project, with a stainless steel chamber ;)
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Unread postAuthor: ilovefire » Sun Sep 05, 2010 11:29 pm

i have just started making one today, but i have gone with the holes idea so i hope it wont blow up :roll: plus i think im using smaller bore chamber than you were, just hope i can figure out the fueling
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