Airsoft Canada - View Single Post - Complicated thinking: Why match cylinder porting and barrel length?

ILLusion · June 13th, 2007, 15:31

In a perfect world... in a perfect system, your theory is 100% correct.

But we don't live in a perfect world, and the AEG system isn't perfect. The air seals within the compression chamber are not 100% efficient, so all of the following areas of air loss must either be corrected to get your formula to work, OR you must allow a greater volume of air to compensate for the lost air:

1) piston head to cylinder wall
2) cylinder wall to cylinder head
3) cylinder head to air nozzle
4) air nozzle to hop up rubber
5) air nozzle to BB
6) BB to inner barrel wall

Variances in temperature can also affect the demanded and supplied volumes of air due to expansion of materials, as well as the quality of compression (stiffening of o-ring rubbers in cold, etc)

Easiest way to go about all this? Just get the pre-manufactured cylinder sets out there. Less headaches, and would work out to a better finished product... and probably even cheaper than any of us could produce. All the R&D is already done... why re-invent the wheel?

June 13th, 2007, 15:31	#47
ILLusion GBB Whisperer Trader rating Join Date: Jun 2002 Location: Toronto	In a perfect world... in a perfect system, your theory is 100% correct. But we don't live in a perfect world, and the AEG system isn't perfect. The air seals within the compression chamber are not 100% efficient, so all of the following areas of air loss must either be corrected to get your formula to work, OR you must allow a greater volume of air to compensate for the lost air: 1) piston head to cylinder wall 2) cylinder wall to cylinder head 3) cylinder head to air nozzle 4) air nozzle to hop up rubber 5) air nozzle to BB 6) BB to inner barrel wall Variances in temperature can also affect the demanded and supplied volumes of air due to expansion of materials, as well as the quality of compression (stiffening of o-ring rubbers in cold, etc) Easiest way to go about all this? Just get the pre-manufactured cylinder sets out there. Less headaches, and would work out to a better finished product... and probably even cheaper than any of us could produce. All the R&D is already done... why re-invent the wheel? __________________ *Advanced Airsoft Armaments and Enhancements* Quick to the gun, sure of your grip. Quick to the threat, sure of your shot. Diligentia, Vis, Celeritas Accuracy, Power, Speed Last edited by ILLusion; June 13th, 2007 at 15:34..