Ok, a bit to get through here haha...
As far as FPS goes, i currently do not know. I am waiting for my xcortech to arrive so will know much then.
I did however find out the RPS, wile recording slow motion with my iphone 6+ and a stopwatch in the background.. I am getting 26rps.
I was very supprised considering its a 18:1 on a full stoke poly piston. I have ground the first tool half way to counter PE and allow clearance for the sector to hit the pickup.
The only thing i am having and it is only a very very small ammount of what i thing is overspin on Semi-Auto. Wich i can correct with my GATE mosfet.
The piston is a SHS poly full metal rack, the pison and cylinder head ar ASG ultimate POM parts. Very happy with those btw, the smooth porting and concave piston head gets a perfect soft contact on the cylinder head.
I have looked down the sorbo route but the OA is perfect and has a high level of padding from the ASG parts.
The cylinder is a 450-550mm, the standard scar was had a 460mm barrel. I changed the cylinder to match my new 6.03 madbull python barrel that was cut down from 590 to just under 565mm due to extending the barrel by 190mm with a beefy silencer.
And no, due to the barrel to cylinder cubic volume i am not using a ported cylinder
The Air seal internally "Pison,cylinder,nozzle" is perfect and looses nothing. Especially after PTFE taping the cylinder head up .
Where seal may be lost in the hopup, i have made no modifications to that as of yet as its by far the easiest and atleast gives me space to play if i need to loose or gain fps. Depending on what its currenly at.
I do agree and see where you are coming from with the rounding of the gearbox ports which it does have. Like i said, i have no plans to push this gearbox and especially dont want to crack the shell any time soon at all.
Only area i dont know is what my pison weight is, it really cant be much at all, the heaviest thing would be the bearing which i kept in both ends of the spring "again another area allowing me to tweak if too powerfull".
My aim is more hitting the 350fps consistently at anything around 20 rps. I dont want more than that, its just a insane waste of bb's and rather work my gun down the DMR route wich only needs a scope.
The gun from stock to silencer break is 1.02m, so its a big one for a assult rifle. Hence the plans for a scope for those longer shots.
Cheers for the link. One note from the video was HOLY CRAP the piston in that sounds like a jack hammer on solid steel. Mines nothing like that. Only the motor wine and air thump
I did spend 4 days shimming rinse repeat untill it meshed perfectly after beading the gears and bearings in a little. Using the gears only motor on 10s at a time with 30s cooldown.
I have been a bit of a perfectionist with this gun and still plan to make it quieter.
For the money i have thrown at this so far, i may have been better off setting up a HPA rig.
Cheers
George
