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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: warhead052 » Mon Jun 27, 2011 1:31 pm

I made a hybrid cartridge, and it worked the first time I tried it! Its simply 3/4" pvc with two screws on either side, an end cap with a schrader in it, and a coupling and a plastic bag burst disk. I have only tried it at 25 psi, simply because I didn't know how loud it would be (turned out to be pretty loud, just louder than a 357 maybe? Sounded like it...) and I will try at 50 psi next.

I compressed air to 25 psi in it, with a few seconds of butane from a lighter, and it worked. Its about 8 inchs long, and fires an airsoft bb buckshot.
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Unread postAuthor: jor2daje » Mon Jun 27, 2011 1:43 pm

If you want it to work consistently with any power you will want some form of metering system.
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Unread postAuthor: Gun Freak » Mon Jun 27, 2011 1:47 pm

Dot use PVC either... You're probably generating about 200 psi doing that.
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Unread postAuthor: warhead052 » Mon Jun 27, 2011 2:01 pm

Its rated to 480 Gun freak, I could use my 600 psi half inch, but its too small for my liking.

Jor, it works consistently enough the way it is, I have shot it 5 times in a row now, and I am letting it cool off in between.
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Unread postAuthor: Gun Freak » Mon Jun 27, 2011 2:05 pm

Still generally not used at that pressure... And you drilled in three holes which makes it weaker...
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Unread postAuthor: warhead052 » Mon Jun 27, 2011 2:10 pm

Well, its lasted, and the bag bursts literally the billionth of a second when the explosion happens...
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Unread postAuthor: jor2daje » Mon Jun 27, 2011 2:15 pm

5 whole times? Dang that's impressive consistency
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Unread postAuthor: warhead052 » Mon Jun 27, 2011 2:17 pm

Yeah. About 1 minute in between each firing because I had to reload it. I have an idea, a really stupid one, but a good one at the same time......


It may involve someone to help me recreate jacks combustion cartridge prototype, with shell ejection, but on a hybrid scale. I am no good at epoxy curing, so thats out of the question for me... For my love of airsoft, and things that go bang, I am sure you know what my idea is already....
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Unread postAuthor: Zeus » Mon Jun 27, 2011 5:45 pm

Remember, many a spudder has gone mad chasing the cartridge dakka dakka. We've got one surviving, and he's addled his brain with epoxy :wink:

And don't use PVC please, it can handle the pressure, but the shock gets it. You can put a hammer on PVC, but whack it and you'll see what I mean.

Anyway, explaining how you've got PVC shards protruding everywhere won't go down well with one's parents, I know, I've been in a similar position.
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Unread postAuthor: warhead052 » Mon Jun 27, 2011 5:57 pm

I understand Zeus, but for what I have available, its all I have. I haven't shot it since when I last posted on this thread anyways, gonna wait for my dad to get home so I can try it again, but sleeved inside 1.25" pvc for some extra safety...
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Unread postAuthor: Fnord » Mon Jun 27, 2011 6:52 pm

You can use pvc in testbed hybrids, just use safety glasses and don't stand close to it ;)
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Unread postAuthor: warhead052 » Mon Jun 27, 2011 7:01 pm

I don't stand close, infact this thing was buried and the only thing above ground was the barrel so the gases could escape. It was pretty fun.
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Unread postAuthor: Doctore » Tue Jun 28, 2011 10:59 am

pics???
And what type of ignition are you using???
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Unread postAuthor: warhead052 » Tue Jun 28, 2011 11:27 am

I am using a regular bbq igniter. I will try to get some pics up, if photobucket works.
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Unread postAuthor: Lockednloaded » Tue Jun 28, 2011 2:09 pm

Glad you could get it working, you'll definitely need to sleeve it with dsome PVC and epoxy for extra strength
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