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Revised Hybrid Piston Valve Design

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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Revised Hybrid Piston Valve Design

Unread postAuthor: saefroch » Tue Aug 03, 2010 7:59 pm

After Technician pointed out the obvious failure of my previous configuration, I came up with this design, which seems to me to overcome the issue of tearing off the front o-ring. I have also replaced the compression spring with an air spring, which is far more adjustable. Useful comments much appreciated.

Old Design:
Image

New Design
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Unread postAuthor: SpudFarm » Wed Aug 04, 2010 7:05 am

Is this a valve housed in a cross fitting? Looks like it and I like it.
But my question is why you don't just funnel the two chambers into one tee fitting and make a regular piston valve?

The piston you are using in the new design looks huge and heavy, that's reason enough to build something simpler in my opinion.

On the other hand, I would like to see a cannon like this.
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