Syringe fuel injection?

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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OneIntervention
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Mon Jan 09, 2012 5:30 pm

Crna Legija wrote:just make sure you get the amount off fuel right on the first shot lol.
Yeah, I'll measure it and do the math and everything :D
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Gun Freak
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Mon Jan 09, 2012 6:25 pm

Better yet do a test run before you show him :wink:
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jimmy101
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Mon Jan 09, 2012 8:30 pm

OneIntervention wrote: @jimmy, I did this, but he says the time it takes to take the syringe off the butane tank and to put your finger onto it, all the butane is already lost.
Well, tell'm he is 100% wrong. Even without a needle a typical syringe is gong to equalize pressure almost instantly (which is good) and then slowly diffuse fuel out and air back into the syringe. In a few seconds the amount of fuel lost will be unmeasurable even with the proper lab equipment.
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OneIntervention
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Tue Jan 10, 2012 10:49 pm

jimmy101 wrote:
OneIntervention wrote: @jimmy, I did this, but he says the time it takes to take the syringe off the butane tank and to put your finger onto it, all the butane is already lost.
Well, tell'm he is 100% wrong. Even without a needle a typical syringe is gong to equalize pressure almost instantly (which is good) and then slowly diffuse fuel out and air back into the syringe. In a few seconds the amount of fuel lost will be unmeasurable even with the proper lab equipment.
I'll save the big, steaming bowl of "I'm right, you're wrong" soup for later ;D
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