a barel that goes inside the chamber

[A-98]

arg, im terrible at ratios. could you help me with the C:B ratio pete?

i have a chamber that is 301 cubic inches, and a barrel that is 63 cubic inches. i did what you did and got .79:1, but i have no idea if that is correct. could you tell me how to do it?

[LosBuenos]

do you need fans if you give the cannon time to cool off after each shot? with propane injection there should be enough air/fuel mixing happening i think.

[fom]

do you need fans if you give the cannon time to cool off after each shot? with propane injection there should be enough air/fuel mixing happening i think.

A fan is for venting the chamber after shots (getting a new oxygen supply) and mixing the fuel/air so there is a even concentration.

[willarddaniels]

Using a fan to mix your fuel before and during combustion gives a HUGE incerase in overall power. I can't remember the numbers, but somerwhere in the range of +31%
The fuel mixing is the most important task a fan does. The second task: cooling/fresh air supply only reduces time between shots.

[A-98]

i hope you guys arent replying to me, cause i forgot to mention that mine was going to be a pneumatic ....now that i think about it, im going to make a new thread

[LosBuenos]

so the fan needs to be blowing into the chamber or out? (wow 31%!)

[willarddaniels]

The fan should be completely enclosed in the combustion chamber. You can access it by removing a plug on the end of the chamber. I usually mount the fan in the back 2" of the chamber and direct the flow toward the barrel.
I am not sure where or in which direction others mount their's...

[PVC Arsenal 17]

LosBuenos, I suck.

[LosBuenos]

i'm sorry to hear that. why do you suck?

[PVC Arsenal 17]

I'm mean. According to your avatar that makes me suck.

[risto]

i try not to suck, but when people are stupid...i can't help myself.

and is there a simple way to calculate what your barrel length would need to be inorder to make a good C:B ratio? i know how to get the volume of my chamber, but how do i figure out how long to make the barrel?

sorry, i suck at math...=[

[LosBuenos]

i try not to suck, but when people are stupid...i can't help myself.

all of us get angry sometimes. its not your fault. i'm not good at math either. i cant help you.

[pyromanic13]

wow... it smells like pussy in here, lets stop talking about our feelings.

seeing how we're off topic now, has anybody discovered the site http://www.tuckermax.com ?

[risto]

yeah, i've been a message board member for a few months, you can find me on there (risto).

I love that place.

[noname]

For an easy method of adding barrel length, calculate how much volume 1 inch of the barrel has, then keep adding that number until you have a good ratio.