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Propane meter

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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Propane meter

Unread postAuthor: jdeaton » Sat Sep 15, 2007 9:53 am

Okay ive seen the plans of how to build a propane meter, but how do i get the propane in the chamber? I assume you use a valve stem for tires, but how would i put that in the chamber without worrying about it getting blown out when the gun fires?

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Unread postAuthor: jimmy101 » Sat Sep 15, 2007 10:38 am

What kind of meter are you thinkging about? For a traditional meter that uses a pipe, two valves and a pressure gauge, a valve stem isn't usually used. Though it can be...

So, must give the typical link to one of Latke's pages; linky.

It is possible to install a tire stem into a chamber. For a typical stem designed for use on a car rim you need to drill the appropriate size hole then install the stem from inside the chamber. If you have a 1/4 NPT tap you can tap a whole in the chmaber then buy a 1/4" NPT threaded tire stem (someitmes hard to find, check your hardware store near the compressors or order one from McMaster).
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Unread postAuthor: CannonCreator » Sun Sep 16, 2007 2:54 am

it explained how to make and how it works in this vid

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