Project "Sweet Melissa"

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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HAYLO_Stealer
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Tue Nov 07, 2006 5:11 pm

How do i find the volume of my chamber for my gun?
Is there a specific math equation im missing. I need to know so i can correctly tune my propane system.
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Pete Zaria
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Tue Nov 07, 2006 5:15 pm

http://www.online-calculators.co.uk/vol ... volume.php .

Just wondering, is this named after the Allman Brothers Band song, "Sweet Melissa"? If so, you have good taste, sir.

Peace,
Pete Zaria.
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HAYLO_Stealer
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Tue Nov 07, 2006 5:25 pm

Ye its inspired by the song AND my girlfriend. Im building a modifyed version of your simple cannon with propane but wityh out the whole back section and im usinga spark plug hook ed a BBQ ignighter.
Note all i listen too is 60 to 70 rock and phyc




188.5714285714284 Cubic inches Chamber


Is there a proformence difference from a sparkplug and screws?
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HAYLO_Stealer
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Wed Nov 08, 2006 12:01 pm

I have another question Which has more potensial energy
Spark plug
or screws
both are hooked to a BBq ignighter
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killagorrila99
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Thu Nov 09, 2006 3:06 am

Hmmm Both will probably work the same?
"I'm sorry, Mr.Bush cant come to the phone right now, He's playing cleudo with Mr. Cheney And he has him in the Cupboard with a broom stick" -White house receptionist.
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rna_duelers
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Thu Nov 09, 2006 4:38 am

Depends were they are placed mainly,or how many there are.
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HAYLO_Stealer
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Thu Nov 09, 2006 5:41 pm

set of screws or 1 spark plug which will be tapped to the side
brumby
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Fri Nov 10, 2006 5:28 pm

spark plug is just easier to use, i had screws shoot out of the gun
abcdefg
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Fri Nov 24, 2006 6:16 pm

aerosol=1.5:1
propane=0.8:1
pneumatic= depends on gun

you could have just looked around the site :roll:
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HAYLO_Stealer
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Fri Nov 24, 2006 6:42 pm

hmm please if you dont have decent critisism dont open your mouth
SpudBlaster15
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Fri Nov 24, 2006 7:26 pm

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jon2680
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Thu Nov 30, 2006 3:36 pm

screw verses spark plug, I'd check the spark plug for resistance. Your bbq lighter may not have enough juice to make a good spark.
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HAYLO_Stealer
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Sat Dec 02, 2006 12:33 pm

well i get a fatter spark but the screws have a longer spark
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HAYLO_Stealer
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Mon Dec 18, 2006 4:47 pm

ok 270.4821428571426 is my new volume and in its in inches and i really dont understand that procalc program plz dont flame me or complain but my meter pipe is 6 inches long how much pressure shopuld be in pipe for propane for it to fire correctly plewase i need to know cause i need to fire it to prove a point to my parent or theyll make megive it away
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jjjd
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Tue Dec 19, 2006 7:54 am

thats way to short, i have a 300ci chamber and i have a ten inch pipe for it, and with that my tank has to sit at full 90, but its cold were i live so i drop it down to about 45 and just do it twice go to www.burntlatke.com and find the fuel tool
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