Pimpin' advanced combustion.

Boom! The classic potato gun harnesses the combustion of flammable vapor.
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chartreusesnot
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This is my second real cannon, and my first combustion. It is an advanced combustion with all the works including a chamber fan, and metered propane. Propane is hard to work with in small chamber volumes such as this, ~375 cc. This is why a meter is critical, so that the propane volume falls within the golden ratio range. ~2.4% - 9.2%. I calculated the pressure for the meter to be around 20 psi. Pretty much all of the information, along with the general design, were found at burntlatke's site. I have fired it a few times, and from what I can see, it is quite powerful. I will take a video at some point. Probably tomorrow.

EDIT 1: Video
Attachments
The propane meter.
The propane meter.
chamber fan, smallest one at radioshack.
chamber fan, smallest one at radioshack.
regulator with propane adapter
regulator with propane adapter
angle shot showing trigger
angle shot showing trigger
chamber
chamber
Full view
Full view
Size comparison
Size comparison
Last edited by chartreusesnot on Sun Feb 24, 2008 6:42 pm, edited 2 times in total.
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Sergeant Dotson
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Very nice! I like the design and idea. Keep up the good work! Now all you need to do is paint it, maybe a poll for different colors?
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chartreusesnot
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Heres the first video in crappy lighting due to a rainy day.
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STHORNE
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you should put a ball valve (or 2) in your propane meter set up for more accurate propane use, but other than that.....

JOB WELL DONE!!! :D


EDIT: oops, my bad, hard to see the ball valves with the skinny handles.
Last edited by STHORNE on Sun Feb 24, 2008 8:44 pm, edited 1 time in total.
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e1337
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There are ball valves as far as I can tell
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chartreusesnot
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they are the small brass pieces on either side of the gauge.
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bigbob12345
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Nice job im planning to make one similar after I save up some money.
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