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propane problems

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 problems

Unread postAuthor: jmc21986 » Mon Aug 06, 2012 8:03 pm

i have a 3 inch chamber appx 2 feet long and a 1 1/12 inch barrel apprx 4 feet long. i built a propane meter that has a 3/8th inch pipe that is 10 inchs long thats attached to the chamber that i cant get to fire except for once that barely had any power. im useing a latern ignitor as my ignitor i really need help with solveing this problem. im really bad with math and could use the help.
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Unread postAuthor: Zeus » Mon Aug 06, 2012 8:08 pm

What pressure are you using, and exactly what is the meter volume.
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Unread postAuthor: jmc21986 » Mon Aug 06, 2012 8:14 pm

well i tried around 40 psi? and i dont mean to sound dumb but what is "meter volume"?
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Unread postAuthor: Zeus » Mon Aug 06, 2012 8:15 pm

The meter pipe volume, that includes fittings.
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Unread postAuthor: jmc21986 » Mon Aug 06, 2012 8:37 pm

can i get an example?
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Unread postAuthor: Zorlord » Mon Aug 06, 2012 9:44 pm

jmc21986 wrote:can i get an example?


I think they mean the literal volume of your meter. Like how many cubic inches it is.
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Unread postAuthor: jmc21986 » Tue Aug 07, 2012 12:52 pm

it is a 3/8th inch pipe thats 10 inches long with two valves and a hose about 2 feet long with a pressure gage.
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Unread postAuthor: Binder17 » Mon Sep 10, 2012 12:25 pm

Assuming the atmospheric pressure where you live is 14.5 psi and the volume of your meter is 1.2 cu in. Your pressure should be around 85psi. If you live at a high elevation then reduce the pressure
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Unread postAuthor: DYI » Thu Sep 13, 2012 8:53 pm

jmc, you still haven't given the volume of your fuel meter. Measure it and tell us, or you're not going to get anywhere with this question.
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Unread postAuthor: jmc21986 » Fri Sep 14, 2012 4:13 pm

i apologize but i dont know how to do that. i live in ohio. i am a newb at all of this
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