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DevilStick

Built a hybrid cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Unread postAuthor: Killjoy » Sat Jun 23, 2007 1:42 am

Yes, my gun is all metal, but after having my advanced combustion cannon explode in my hands and burn me, I am terribly paranoid.

Aw no guts, no glory. At least if your hybrid explodes in your hands you'll probably be dead or uncoconcius so you won't feel a thing, till you wake up at the hospital if you survived. But yes, i would be paranod to if i had had one of my previos canons explode in my hands.

Anyways on a happier note, I find it clever noname that you used a soda bottle for the mixing tank, just seems so resourceful.
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Unread postAuthor: SpudBlaster15 » Sat Jun 23, 2007 3:11 am

noname wrote:I was wondering (You may be able to answer this SB15):
I have 2 15' wires that I can attach to the BBQ ignitor. In a regular atmosphere, I can still get a 1/4" spark. Think it would be enough for a 1/16" spark in a 3x mix?


Spark gap length is inversely proportional to atmospheric pressure. So, at 3x atm, your available spark gap would be 0.25/3 = 0.083, which is 1/12 of an inch. Yes, your 15' wires should work with a 1/16" gap.

Killjoy, didn't you have a PVC cannon filled with oxygen and hydrogen explode in your hands?
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Unread postAuthor: Killjoy » Sat Jun 23, 2007 3:49 am

yeah, but i try to block bad things like that form my mind, which is probably why i don't learn from my mistakes (though i don't experiment with oxygen and hydrogen in cannons anymore, my subconcious must have somethign to do with that).
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Unread postAuthor: noname » Sat Jun 23, 2007 10:23 am

YES!!! Remote ignition! I wasn't thinking about recoil the first time I shot it and the bastard blasted backward (tongue twister?) and nailed me in the stomach.
Reasons I used a soda bottle:
Cheap, it's $1.59, plus now I have 2 liters of RootBeer in water bottles. I would have used a piece of 4" PVC like DR's, but 4" Sch 40 PVC is only available to me in 20 foot lengths, and its $45 for one of those.
The bottle is clear, so I can tell how much more water will fill it before it actually gets in the ignition chamber.
According to Rmich, it should allow me to fill the cannon to a bit more than 3x, which would be my maximum anyways.

I'l probably think of more stuff later. For now I'll set up remote ignition and the new barrel (10' x 1.5") and get a few more pics, possibly one insde with everything laid out so I can describe what all the stuff is for.
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Unread postAuthor: sniperjosh » Fri Jul 13, 2007 6:17 pm

hi wrote:
one works the other doesnt.

its all in the fueling method.

mine is a gen. 1 (doh!) it uses a meter like a combustion and is nearly impossible to get right.


um??? maybe your metering is off, ive had 0 missfires using my JAUSH from 1x mixes to 7x mixes. And the chamber volume is tiny (requires more accurate metering).

Nice hybrid, I personally am not a fan of gen II's, but it looks like u've got a good gun and an awsome setup with ur tree there :P nice work!
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