STAG-3

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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PCGUY
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Sat Feb 12, 2005 5:08 pm

<div align="center">STAG 3

Provided By - Bartman007

<img src="http://www.spudfiles.com/official_pics/STAG3.jpg">

This is my flagship combustion model. Chamber is totally double-walled and uses a 5.8" piece of 4" Sch40-PW PVC. It was designed to be a .8:1 ratio for my current barrels (which were designed to 1.5:1 for the STAG2) It features a chamber fan, on-board propane metering, stun gun ignition and 3 sparks. The propane meter uses quick-disconnect fittings and has a 3" ABS propane tank holder. The meter itself is a custom shaped 3/4" brass meter. The multiple sparks use 1/4"x2.5" bolts with locknuts at the ends for correct spark spacing. They use normal 12g wire and have green duct tape covering the heads of the bolts, eliminating shock risk. The stun gun itself uses 18g wire. Both launcher and chamber have electrical quick-disconnects so I can use the stun gun on multiple launchers. The whole launcher was painted with Spring Green Krylon Fusion.

<img src="http://www.spudfiles.com/official_pics/ ... ropane.jpg">

Just a close-up of the STAG 3 chamber the propane meter. The propane meter uses quick-disconnect fittings so the regulator and torch head can be used on multiple launchers.

Provided By - Bartman007 </div>
Last edited by PCGUY on Fri Jul 28, 2006 11:58 pm, edited 1 time in total.
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CBRAY1618
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Thu Apr 21, 2005 8:03 pm

I like how small the meter is i will have to try that
bushrocks06
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Tue Aug 30, 2005 5:56 pm

how did you make that injection system. it looks sweet
spudshot
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Tue Aug 30, 2005 7:32 pm

its really just a bunch of elbows and street elbows, he most likely measured the volume after adding each elbow until he got the desired volume for the correct amount of propane
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Fez_uk
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Thu Jan 05, 2006 1:42 pm

I live in the Uk and was wondering what the regulator is called and is there any site which i can get some details on it?

What other type of regulator do the propane injection systems use? (like the one on burnt lake)

Thanks
spudshot
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Thu Jan 05, 2006 4:24 pm

most of us just use a normal air pressure regulator (not an air FLOW regulator) Mr. Heater makes special ones for propane, but i've never seen an adjustable one
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Fez_uk
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Fri Jan 06, 2006 6:28 am

Oh thanks, I can get one of those easily i think

One like that? http://www.airlines-pneumatics.com/webc ... de=S050138
CHRISW_is_DEAD
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Sun Feb 26, 2006 9:30 am

The quick release propane bottle is a really cool idea and i like the housing for the stun gun. One quick question- how do u hold this buddy? The propane probably gives it a nice kick. Are u just standing there with one hand on the barrel and one on the ignitor?
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