Still confused on chamber size

[noname]

I think a smaller chamber with higher pressure would yield better performance, simply because the air would dump faster. You could use a 1/2" x 10 foot chamber, or you could use a 3" chamber x 1 foot long, and with the same volume of air, a 3" chamber would be much better because the air wouldn't need to come from all the way at the back of the 1/2" stick.
That's just how I look at it though.

[Mitchza89]

Yeah I agree on that one but GGDT says that a bigger chamber size with a bit less psi gives the same power if not more.

Oh yeah, I'm making a poly bb pistol for my mate, gonna sell it for 50

[jackssmirkingrevenge]

Ok, here's my imaginary launcher, and the results I got when I played with the variables:

20 inch chamber at 50 psi - 406 feet per second

10 inch chamber at 100 psi - 537 feet per second

5 inch chamber at 200 psi - 684 feet per second

2.5 inch chamber at 400 psi - 830 feet per second

1.25 inch chamber at 800 psi - 958 feet per second

0.625 inch chamber at 1600 psi - 1006 feet per second

All the time, we're talking about the same quantity of air, because we're doubling the pressure but halving the volume.

[Marco321]

Ok, here's my imaginary launcher, and the results I got when I played with the variables:

20 inch chamber at 50 psi - 406 feet per second

10 inch chamber at 100 psi - 537 feet per second

5 inch chamber at 200 psi - 684 feet per second

2.5 inch chamber at 400 psi - 830 feet per second

1.25 inch chamber at 800 psi - 958 feet per second

0.625 inch chamber at 1600 psi - 1006 feet per second

All the time, we're talking about the same quantity of air, because we're doubling the pressure but halving the volume.

Thanks for that Jack