Chamber to Barrel Ratio for Propane cannons

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SpudFiles Forum Index » Combustion Cannon Discussion » Chamber to Barrel Ratio for Propane cannons

Chamber to Barrel Ratio for Propane cannons

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MisterSteve124

Posted: 11/05/2006 19:54 PM Post subject: Chamber to Barrel Ratio for Propane cannons

Colonel

Joined: 11 Feb 2006
Posts: 709
1136.02 Spud Bux

I read somewher that if you want to build a propane cannone you should use .8:1 C:B Ratio. I was just wondering if this is true? If not then I'll just stick with 1.5:1

Tater Salad

Posted: 11/05/2006 20:31 PM Post subject:

Private First Class

Joined: 05 Nov 2006
Posts: 35
7.03 Spud Bux

yes this is true. Some people might say that .6:1 is better but thats for efficiency. The better the ratio (.8:1, 1:1) the louder it becomes and the more energy is wasted. 1.5:1 is best for aerosol fuels.

MisterSteve124

Posted: 11/05/2006 21:04 PM Post subject:

Colonel

Joined: 11 Feb 2006
Posts: 709
1136.02 Spud Bux

ok anyone else? sorry but I don't really trust someone with only 1 post.

SpudBlaster15

Posted: 11/05/2006 21:17 PM Post subject:

Human blast shield
Major General

Joined: 18 Oct 2006
Posts: 1539
11.03 Spud Bux

He is right, .8:1 is optimal when using metered propane. However, 1.5:1 is far from optimal when using aerosol fuels, unless the fuel has an extremely low energy desnsity. 1:1 is closer to optimal when using your average aerosol such as right guard, axe, or other deodorants, all of which have similar energy densities.

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