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no burst disc 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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Unread postAuthor: Jolly Roger » Wed Sep 27, 2006 9:07 am

Thats a good concept. Have you put any thought into a semi-auto hybrid at all? Considering your design ability I think you would be very able to come up with something.
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Last edited by Jolly Roger on Mon Jul 02, 2007 7:27 am, edited 1 time in total.
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Unread postAuthor: Jolly Roger » Wed Sep 27, 2006 9:10 am

Yay, this is my 100th post! I probably should have posted something worthwhile for my 100th post but hey...
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Last edited by Jolly Roger on Mon Jul 02, 2007 7:28 am, edited 1 time in total.
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Unread postAuthor: carlbelcher » Wed Sep 27, 2006 12:16 pm

100 posts and you still double post...
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Unread postAuthor: Jolly Roger » Thu Sep 28, 2006 5:18 am

yeah.............................
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Unread postAuthor: Jolly Roger » Thu Sep 28, 2006 5:18 am

so what?.............................
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Unread postAuthor: carlbelcher » Thu Sep 28, 2006 4:04 pm

Read the rules lately? f*ing noob!
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Unread postAuthor: Jolly Roger » Thu Sep 28, 2006 11:56 pm

....................../´¯/)
....................,/¯../
.................../..../
............./´¯/'...'/´¯¯`·¸
........../'/.../..../......./¨¯\
........('(...´...´.... ¯~/'...')
.........\.................'...../
..........''...\.......... _.·´
............\..............(
..............\.............\...
Jokes man I'm only kidding
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Last edited by Jolly Roger on Mon Jul 02, 2007 7:29 am, edited 2 times in total.
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Unread postAuthor: dongfang » Sat Sep 30, 2006 1:08 pm

A non burst disk hybrid? I think my idea for a jet gun (in the thread just before this) is that. But my design is release first, then ignite.

Soren
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Unread postAuthor: Jolly Roger » Sun Oct 08, 2006 11:41 am

GalFisk wrote:The exhaust piston is connected directly to the main piston, so when the mix is ignited in the chamber, the pressure begins to move the main piston, which moves the exhaust piston and vents the pilot. When the piston is fully open, the vent is blocked off again which lessens the strain on the main piston.
The valve is a three way ball valve, which is modded so that it can point in any direction for fueling, pressurization or firing. It's also used as the trigger when firing in pneumatic mode.
I have a detailed (though somewhat obsolete) Rhino3D model of the gun if you're interested.


Nice work man, just one thing I didn't really understand. Why do you have to have the piston vented? I would have thought that if you completely blocked off the vents near the rear (the smaller piston) that it would be better simply because it would pressurize the piston slightly and when the chamber pressure drops down to a certain pressure the piston would seal once again making it semi.. semi? If you know what I'm getting at.. That pressure at which the piston would seal again would all depend on the piston ratios of course.
Edit: Just trying to watch some videos on your site, they look really good but I can't download the whole file. It gets to like 10 percent and says its finished, and I'm like "hmm, no you are not finished now keep downloading damn it..." Know whats going on at all?
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Unread postAuthor: nabsnoabs » Sun Oct 08, 2006 12:52 pm

well i took GalFisk's cannon idea and came up with a completly inline hybrid concept

u guys think it can work?
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Attachments
inline no burst disc concept.jpg
hers my concept
sorry but its just a rough sketch

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Unread postAuthor: Jolly Roger » Mon Oct 09, 2006 4:19 am

Depends, it would work if you wanted it to explode, but if you wanted to use it as a gun, your piston sealing on the barrel would have to be smaller than the middle piston. Other than that I don't see any problems in it.
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