Quote Originally Posted by billy breach
I was thinking of using a low pressure system, not a full pressure system. That way I can build and buy parts.

I was thinking of using a car compresser for blowing up tyres (the heavy duty type for blowing up 4x4's etc)
Basic formula. Flow*pressure/500= Kw needed. A car-compressor has following limitations. 12V 30A =car fuse on the sigaret lighter. This means at best 360Watts to the motor.
The cheap build robs 35%, and that will translate in pure heat. Leaving 260W peak for the compressor.

Max pressure for commercial-and easely available pneumatic parts 8 bar.
So 8*X/500=0.2 Kw
X= 0.2*500/8= 12.5L minute.
This means a 1 liter buffertank needs 38 seconds to get filled @8 bar.
In effect everybody that used the car-compressor idea in the past tried to get with a full buffer in the arena, and after the first shot, the compressor kept on draining the batteries.
and a buffer tank maybe a dry powder fire extinguisher or tubes rolled up to great a buffer tank. Does anyone know or if anyone still does this method?
A powder extinguisher as low pressure buffertank is seen more in the low pressure users, but those are rare, and most use other storage vessels as the car-extinguishers are rather big for a feather.
and any idea who can make a T- joint type of fitting that will thread onto my lower pressure buffer tank (dry powder fire extting?) onto a standard 10mm low pressure (10 bar I think) tube?
Yes. PM me.