2" Chamber to 1/2" Barrel old school Hair spray

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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tatfree
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Fri Mar 19, 2010 1:07 am

I just picked up an Aluminum 2" Cam and groove coupler yesterday,

Like this one.
http://www.spudfiles.com/official_pics/breech01.jpg

I am going with an Aluminum 2" Chamber down to an Aluminum 1/2" Barrel then Anodize the whole thing when I'm done ( Mostly for looks ).

What's the most efficiant Chamber to barrel ratio for a 2" to 1/2" barrel ? I have looked on here and don't see much on this when using the old school design of Hair spray fueled ( Aqua net is my favorite ).

Barrel length ?

I was also thinking of going with a 3/4" barrel, but have not settled on that one yet.

Barrel length ?

The Ignition will be placed in the rear of the chamber using a single isolated wire in and it will ark against the Aluminum tube probably using a 1/8'' gap.

Thanks for the help.
P.S this is my first post in the combustion forum.
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tatfree
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Posts: 63
Joined: Mon Mar 01, 2010 7:43 pm

Sat Mar 20, 2010 1:02 pm

Okay thanks guy, looks like I'll make it a 4 to 1 ratio chamber/barrel for maximum efficiency as many of you PMed me with to do.
Keep the PM's coming.
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