Airsoft Forums UK

you mean cylinder ???

yeah sorry ! too early on a monday

either:

http://www.ebay.co.uk/itm/SHS-Cylinder-200-350mm-Type-2-Line-Surface-/221802564148?pt=LH_DefaultDomain_3&hash=item33a4768a34

or

http://www.ebay.co.uk/itm/SHS-Cylinder-Type-1-Ribbed-Surface-Airsoft-/321784193190?pt=LH_DefaultDomain_3&hash=item4aebd520a6

first one is on the limits

and second is a smidge over volume but what you seek is a distance of at least 52mm to front of cylinder from port

-15mm = 37 for 370 barrel

that is perfect for 0.20's and should lift .25's ok but heavier bb's will need more vol ratio or port further back - tbh a little over vol is better than under volume

http://www.airsoft-forums.co.uk/index.php/topic/25386-some-easy-simple-airsoft-maths-that-i-think-work/

explains a bit more - used to think it was distance minus 12mm but in actual fact it should be 15mm.

I stand by these maths as quick easy reckoners. if lifting heavier bb's then subtract 20mm to over vol a bit

eg for heavier bb's on a 363 then look at the 400 type cylinder or one that has ports 55mm+ back front front of cylinder

oh forget the typo's n crap - you get the idea hopefully

Cheers, useful stuff, when looking into it online it was getting so technical i was at a loss !

yup - it is a bollox tbh unless you like maths n crap but thos bits do kind of work out about right for me - 15 to 20mm of cylinder ports dimensions. And bevel x 3 = easy rough gear ratio calculator

Damn I need to get out more