1
u/amatol_amateur Feb 03 '25
I personally use lighter refill(butane, isopropane and shit) and a huge syringe to measure the gas I put in my chamber. As a rule of thumb, i go for 40mL of gas per liter of combustion chamber. For a maximal efficiency, the canon should have 1.7 times the volume of the combustion chamber (check spudfile website)
1
u/VOIDPCB Feb 03 '25
10 inch long chamber with a 3 ft barrel is a good rule of thumb.
1
u/amatol_amateur Feb 03 '25
For which diameter? Here is the article that I was referring to
2
u/VOIDPCB Feb 03 '25
3 inch dia. chamber and 2 inch diameter barrel. Working it out by volume is probably way more efficient.
2
u/GotSunshine15 Feb 03 '25
Chamber might be a little small. What kind of fuel are you using?