Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
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jmc21986
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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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Zeus
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Mon Aug 06, 2012 8:08 pm
What pressure are you using, and exactly what is the meter volume.
/sarcasm, /hyperbole
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jmc21986
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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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Zeus
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Mon Aug 06, 2012 8:15 pm
The meter pipe volume, that includes fittings.
/sarcasm, /hyperbole
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jmc21986
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Zorlord
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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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jmc21986
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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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Binder17
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Contact:
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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DYI
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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.
Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
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jmc21986
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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
