need some help with c:b ratios

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Pilgrimman: Specialist 4; Posts: 480; Joined: Thu Jun 28, 2007 1:10 pm; Location: Grants Pass, OR

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Wed Aug 08, 2007 12:40 am

If the projectile is right up against the breech.

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Ratios!

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by neilman88 » Sun Aug 07, 2005 6:40 am » in General Cannon Discussion

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hey is there like a thing i can download to figure out ratio...because i have no clue how to do it, if someone said hey is your rario good then i...

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ok many many thx

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How can these ratios be right?

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by djwilliams0822 » Fri May 04, 2012 12:06 pm » in Combustion Cannons

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I am wondering why do you think a 1.5:1 ratio will make more power than say a 4:1? I have a 4:1 and it has a lot of power. My thinking is the more...

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Jimmy covered essentially all the relevant points.

It also needs to be ascertained whether the poster is looking at optimal CB for a given barrel,...

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right ratios

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by kimmimaru1227 » Thu Dec 20, 2007 9:11 pm » in Combustion Cannons

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i was wonderin about my gun and a problem arose..... need the right propane to air ratio..so if anyone knows it plz tell.

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Ya know, there's a fairly good chance that the 4.9% test velocities where actually higher than the 4.6% tests... latke's data had a large standard...

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CB Ratios

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by ralphd » Mon Dec 17, 2007 8:51 pm » in Combustion Cannons

First post

I first read that 1.5 to 1 is optimal so that is what I designed for. It was OK but when I switched to metered propane and a combustion the gun...

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Well, I guess I can always go to 2 . I didn't install a camlock but I can remove it easily. Another projectile I wanted to launch is tennis balls and...

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Ratios? Please help

Last post by jimmy101 « Sat Sep 22, 2007 12:34 pm
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by Potato Head » Sat Sep 15, 2007 4:20 pm » in Combustion Cannons
1

2
First post

Hi I am a rookie builder and I want to make the most powerful gun. I know that 1.5:1 is the best ratio. Can someone calculate the math for me so that...

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Thanks so can you help me ?

Chamber : 4'' X 18'' = 226 ci.

my two first one were really not well made lol
:?
volume chamber = PiR 2 L =...
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Last post by jimmy101
Sat Sep 22, 2007 12:34 pm

Return to “Pneumatic Cannons”

need some help with c:b ratios

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