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Small disposable propane tanks?

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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Small disposable propane tanks?

Unread postAuthor: kjjohn » Sun Apr 11, 2010 6:27 pm

Does anyone know where to get those really small propane tanks? I remember seeing one on a cannon on this site a few months back, but 12 pages of search results turned up nothing. The cylinders are smaller than normal welding type propane tanks.
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Unread postAuthor: Lockednloaded » Sun Apr 11, 2010 6:40 pm

Here ya go Mind if i ask what you will be using it for?
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Unread postAuthor: kjjohn » Sun Apr 11, 2010 6:42 pm

I am working on a pistol type cannon design. What are the threads on those? It said 3/8-24, but that is not very specific. Are they regular 3/8 NPT threads? Also, how much propane do those store in comparison to normal propane cylinders?
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Unread postAuthor: c11man » Sun Apr 11, 2010 6:44 pm

3/8-24 is very specific. it means 3/8 size and 24 teeth per inch. this is not pipe threads but standard threads you would find on a bolt
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Last edited by c11man on Sun Apr 11, 2010 6:47 pm, edited 1 time in total.
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Unread postAuthor: Lockednloaded » Sun Apr 11, 2010 6:46 pm

it has the same threads as a threaded 12g co2 cartridge
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Unread postAuthor: kjjohn » Sun Apr 11, 2010 7:05 pm

How would one attach a regular propane reg to this?
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Unread postAuthor: Lockednloaded » Sun Apr 11, 2010 8:09 pm

well you could go
propane tank>tire inflator>shrader>propane reg
or you could use one of these
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Unread postAuthor: mark.f » Sun Apr 11, 2010 8:48 pm

I would see if I could find a 3/8"-24tpi tap, and then drill and tap a 1/4" or 3/8" pipe cap. That way you could go to the regulator with a nipple and the cap.
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