no burst disc hybrid

[Jolly Roger]

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.

[Jolly Roger]

Yay, this is my 100th post! I probably should have posted something worthwhile for my 100th post but hey...

[carlbelcher]

100 posts and you still double post...

[Jolly Roger]

yeah.............................

[Jolly Roger]

so what?.............................

[carlbelcher]

Read the rules lately? f*ing noob!

[Jolly Roger]

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Jokes man I'm only kidding

[dongfang]

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

[Jolly Roger]

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?

[nabsnoabs]

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

u guys think it can work?

[Jolly Roger]

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.