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mini hybrid win!

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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Unread postAuthor: jackssmirkingrevenge » Sun Sep 12, 2010 7:06 am

Going for velocity records means large and loud launchers, which is not ideal for my situation. I'd love to give an airsoft BB ago, sadly the barrel is 5.5mm so they don't fit :roll:

Have another couple of shots at 14x:

[youtube]http://www.youtube.com/watch?v=jeMxygavgi8[/youtube]
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Unread postAuthor: SpudFarm » Sun Sep 12, 2010 12:14 pm

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Unread postAuthor: jackssmirkingrevenge » Sun Sep 12, 2010 12:17 pm



That capacitor bank is pretty big :P
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Unread postAuthor: SpudFarm » Sun Sep 12, 2010 12:18 pm

That capacitor bank is pretty big :P


Most propane tanks and compressors are to ;)
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Unread postAuthor: jackssmirkingrevenge » Sun Sep 12, 2010 12:35 pm

SpudFarm wrote:Most propane tanks and compressors are to ;)


True, butthis + shock pump is my firing setup ;)
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Unread postAuthor: ilovefire » Sun Sep 12, 2010 6:19 pm

jackssmirkingrevenge wrote:I'd love to give an airsoft BB ago, sadly the barrel is 5.5mm so they don't fit :roll:


you could cut a couple bbs down to size (if you have the patience) or you could cast some epoxy projectiles
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Unread postAuthor: jackssmirkingrevenge » Sun Sep 12, 2010 6:52 pm

ilovefire wrote:you could cut a couple bbs down to size (if you have the patience) or you could cast some epoxy projectiles


I was thinking of a bit of foil hammered into a section of barrel to form a lightweight aluminium slug...
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Unread postAuthor: Lockednloaded » Sun Sep 12, 2010 8:41 pm

But you have a threaded connection now! so you can get a 6mm barrel right?
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Unread postAuthor: jackssmirkingrevenge » Sun Sep 12, 2010 11:53 pm

As soon as I find a similar male threaded fitting, 'cause this one came out of my scrap box.
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Unread postAuthor: SpudFarm » Mon Sep 13, 2010 1:58 pm

What's the OD of your barrel? Perhaps you can sleeve a 6mm barrel over it.
Just have 2" or so of small diameter barrel that you can slide the 6mm barrel over.
Then you have a 4" piece of 6mm pipe to connect the smaller barrel again.
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Unread postAuthor: jackssmirkingrevenge » Tue Sep 14, 2010 1:28 am

It's easier to find a male threaded fitting and slip on a whole new barrel, I'll see if I can find something similar at work because it looks like an ATEX fitting so the original one probably came from work originally anyway :roll:
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Unread postAuthor: jakethebeast » Tue Sep 14, 2010 10:18 am

we force you to get the new barrel and fitting! :D :D
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Unread postAuthor: jackssmirkingrevenge » Tue Sep 14, 2010 10:27 am

I'm pleased to announce that a matching male fitting has been located, and a 6mm barrel over twice as long as the current one has been fitted and is currently curing.

If I got almost 1,000 fps with a 1 gram projectile in a much shorter barrel, then I expect 0.12-0.25g BBs in this one should be well over the speed of sound :D watch this space.
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Unread postAuthor: POLAND_SPUD » Tue Sep 14, 2010 10:36 am

don't forget that a larger cal. and longer barrel can act as a suppressor
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Unread postAuthor: jackssmirkingrevenge » Tue Sep 14, 2010 10:44 am

POLAND_SPUD wrote:don't forget that a larger cal. and longer barrel can act as a suppressor


... though the expected sonic crack will most likely cancel out this beneficial effect :roll:
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