Hey guys...
Im not shure if you guys have seen my older post, but I mentioned that I was planning to make and interchangle combustion chamber, So that different sized chamber can be changed, for different styles of shooting, I also asked around and it seems like that doing this is safe.
If you have any upcoming projects, feel free to try, as I am unaware of the changeable chambers causing any troubles yet
gonkz
Changeable Combustion
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Animal81182
- Private 4
- Posts: 81
- Joined: Wed Sep 07, 2005 7:48 am
- Location: Uk
i am sorry i dont quite understand what you are trying to ask???
my combustion launcher has a 2" female thread in the chamber, from this i have got -
1- 2" male thread with plain 2" socket for 2" pipe
2- a 2" male thread -to- 2" male thread now this will take a 1.5" Pipe throught the middle giving me a breach load barrel!!!
Animal
my combustion launcher has a 2" female thread in the chamber, from this i have got -
1- 2" male thread with plain 2" socket for 2" pipe
2- a 2" male thread -to- 2" male thread now this will take a 1.5" Pipe throught the middle giving me a breach load barrel!!!
Animal
Animal @ http://www.EuroSpudGun.com
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boilingleadbath
- Staff Sergeant 2
- Posts: 1635
- Joined: Sat Mar 12, 2005 10:35 pm
- Location: Pennsylvania, USA
"different styles of shooting"
Quiet vs. powerful?
Anyway, there is no reason not to have a few different chambers which attach to the barrel with the same [diameter] threads.
Quiet vs. powerful?
Anyway, there is no reason not to have a few different chambers which attach to the barrel with the same [diameter] threads.
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Animal81182
- Private 4
- Posts: 81
- Joined: Wed Sep 07, 2005 7:48 am
- Location: Uk
ah i see sorry my bad -
Why do you want to go to all that trouble?
you want to be thinking about C:B ratio - i.e. the ratio between the volume of the chamber to the volume of the barrel!!!
the optimum C:B ratio for power is 1.5:1 or near as - that means the chamber must be 1.5 times larger than tha barrel!!
if you want the thing to be louder the easiest way is to have a second barrel shorter in length - this will make it louder and less acurate and not travel as far.
Check out http://burntlatke.com/
He has loads of info on ratios and tesat loads of barrel length very informative
Animal
Why do you want to go to all that trouble?
you want to be thinking about C:B ratio - i.e. the ratio between the volume of the chamber to the volume of the barrel!!!
the optimum C:B ratio for power is 1.5:1 or near as - that means the chamber must be 1.5 times larger than tha barrel!!
if you want the thing to be louder the easiest way is to have a second barrel shorter in length - this will make it louder and less acurate and not travel as far.
Check out http://burntlatke.com/
He has loads of info on ratios and tesat loads of barrel length very informative
Animal
Animal @ http://www.EuroSpudGun.com
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boilingleadbath
- Staff Sergeant 2
- Posts: 1635
- Joined: Sat Mar 12, 2005 10:35 pm
- Location: Pennsylvania, USA
A bigger chamber will give you more preformace for a given barrel. To get quiet opperation out of such a chamber, you'd have to have a obnoxiously lowh barrel; an easy fix is to have a small chamber. While it's not going to be as powerfull, there are situations where you are forced to use a quiet cannon.
One may also point out that the 1.5:1 Vratio (for max power/length) will only apply for linear desins, and will vary between them (if both the chamber and barrel are the same diameter, for instance, the desired Vratio is about .8:1 [simplistic GGDT modle])
One may also point out that the 1.5:1 Vratio (for max power/length) will only apply for linear desins, and will vary between them (if both the chamber and barrel are the same diameter, for instance, the desired Vratio is about .8:1 [simplistic GGDT modle])
I have a small 2" cannon and I can changed the length of the combustion chamber by just screwing in another section of chamber and then follow with the end or clean out cap . Is this the kind of thing you are talking about? Seems like a good plan to me but I don't know if you can get the kind of piece you need when you go above 2".