Coaxil Design
I haven't seen if anyone has donw a coaxil like this before, but in my mind it should work. I just wanted more cubic volume and like the simplicity of coaxil pistons so I did this. If anyone has seen one like this please post it, I'd like to see how it performs.
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- Simple design, I just used 2" as an example.
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- Staff Sergeant 2
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Depends how long he wants his barrel, or how fat.
I like it.
I like it.
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- knappengineering
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In theory it should work, but the extra volume is probably not necessary.
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benstern-But how would it propose a problem? I didn't really try to make it to scale either.
Ive been wanting to have a high volume cannon...bigger barrel, bigger chamber= farther distance.
I was going to try something like a 30inch chamber, and 4" diameter with is over 400 cubic inches. I just think too big sometimes though. As well as the fact I have to "one up" my friend.
edit- As far as a barrel, maybe a GB barrel or something around 1.5".
Ive been wanting to have a high volume cannon...bigger barrel, bigger chamber= farther distance.
I was going to try something like a 30inch chamber, and 4" diameter with is over 400 cubic inches. I just think too big sometimes though. As well as the fact I have to "one up" my friend.
edit- As far as a barrel, maybe a GB barrel or something around 1.5".
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It would make quite a good piantball shotgun
America, the greatest gangster of all time. With 200 million odd foot soldiers at it's whim and call.
When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.
When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.
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my math might be bad, but wouldn't a single chamber of 3" pvc hold more than two chambers of 2"?
area of 2" circle = 9.8-10.0-ish
area of 3" circle = 22-ish
i'm too lazy to break out a calculator
not to mention less fittings
area of 2" circle = 9.8-10.0-ish
area of 3" circle = 22-ish
i'm too lazy to break out a calculator
not to mention less fittings
- Pete Zaria
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Sure it will work, but I see two problems....
It inherently creates a way-too-big C:B ratio, unless that's one of your design objectives, and,
It will restrict flow a lot. Connect the "secondary chamber" to the main chamber closer to the valve, the closer to the valve, the less distance the air has to go to exit out the barrel, and the faster it should be able to dump. Did that make sense?
Peace,
Pete Zaria.
It inherently creates a way-too-big C:B ratio, unless that's one of your design objectives, and,
It will restrict flow a lot. Connect the "secondary chamber" to the main chamber closer to the valve, the closer to the valve, the less distance the air has to go to exit out the barrel, and the faster it should be able to dump. Did that make sense?
Peace,
Pete Zaria.
- Lentamentalisk
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The bottom chamber is completely unnecessary if you are going for a 1.5" barrel in a 4" chamber. A little sketchy rounded math to show:
1.5" volume:
(1.5/2)^2x(pi)x(length)=1.77x(length) sqr. in.
4" volume - 1.5" pipe (for simplicity we will say it has a 2" O.D.)
{[(4/2)^2x(pi)]-1.77}x(length)=10.80x(length) sqr. in.
Ratio:
10.80/1.77=6.1:1 C:B ratio
That is already HUGE!!!!!
hope this helps
edit: lol took me a long time to post. you all beat me
1.5" volume:
(1.5/2)^2x(pi)x(length)=1.77x(length) sqr. in.
4" volume - 1.5" pipe (for simplicity we will say it has a 2" O.D.)
{[(4/2)^2x(pi)]-1.77}x(length)=10.80x(length) sqr. in.
Ratio:
10.80/1.77=6.1:1 C:B ratio
That is already HUGE!!!!!
hope this helps
edit: lol took me a long time to post. you all beat me
Last edited by Lentamentalisk on Mon Nov 05, 2007 9:22 pm, edited 1 time in total.
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well you could get somewhat more power with less chamber volume because it would be easier to get a higher presser. I would say to cut down on most of that extra chamber volume and make it a more of a handle rather than a big, bulky, unnecessary chamber.
4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
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Start Stirrup pump
Start Toolies piston bazooka
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
Pete- Something more like this? My previous post was refering to what you said too.
letamentalisk- Well it's not going to be a small cannon. Or at least I don't plan on it being one.
letamentalisk- Well it's not going to be a small cannon. Or at least I don't plan on it being one.
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- spudgunnerwryyyyy
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Much better, But, you could reduce the length even more. The point of a coaxial is that it is small and compact.
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