AirMax P15 .25
Came last night. nice looking little pup is light as advertised. Spits AA 25.4s 796fps Hi, Lo 576 from just adjusting the hammer spring. trigger not bad nothing in the paperwork on what the reg is set at.
Pulled the stock off as i was unscrewing the rear mount bolt i heard something spring loose. nothing fell out lol. inspecting the bolt threads you could tell how far it was screwed in. so i screwed it in to see how far it moved the trigger rod that was what sprung free.
looks to be about 3 or 4 threads sticking through the hole hitting the trigger rod. i put it back together and just left out the rear bolt the front bolt holds it fine for now. i’ll cut a washer for it later. the side lever started out a little rough. the arm link seems to be hitting a square corner left over from milling i’ll hit that with a file later. not really crazy about the 11mm scope rail but looks like skilled laborer could whip up a weaver rail in no time. on sound at 1 meter away 796fps on my cheap sound meter 114dba, 1meter away 576fps 104dba.
ok so instead of making a washer for the rear mounting bolt i went ahead an sawed of 5 threads. that seemed to work best.
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Wingman is removing the piston from a reg ok ? Cause I still need a oring for high pressure for sealing the tube at the breech.
ok thanks Wingman i’ll give it a try without a reg. from what i see the barrel TP and Valve TP are lined up. not sure how the valve comes out. it looks like a set screw holds it in place at the bottom of the breech. lol thats not good news for p15 owners. if i figure out how the valve comes out i’ll give it a gentle massage.
Your transfer port is too small… at 4.5mm it is suitable for use without a reg. You need 5.5mm through the barrel, no bigger or the pellets will drop in and shave lead and 6mm to 6.5mm bores from behind valve seat to valve tp.
I suspect the plenum is too small for decent velocities too.
huma 130b 200b fill end 150
0t 748 1/2t 763 1t 778 11/2t777 2t 786 2 1/2t 785 3t 789 4t 786 4 1/2t 782 FH 788
775/779/774/769/777/772
huma 135b 200b end 150
0t 707 1/2t 732 1t 752 1 1/2t 777 2t 786 2 1/2t 781 3t 790 3 1/2t 784 4t 787 4 1/2t 785 FH 789
789/784/785/788/785/791/789
huma 140b 200b fill end 148b
0t 676 1/2t 700 1t 728 1 1/2t 749 2t 769 2 1/2t 778 3t 788 3 1/2t 797 4t 803 4 1/2t 799 FH 799
799/803/803/804/800/806/806/809
sorry this wouldn’t fit in the above post
i think you will need to enlarge transfert port with higher plenum if you want to increase you power
Ok damned ole China reg pulled, reset the huma back to 130b. Going to 5b adjust on the huma instead of 10b at a time. Little steps. Cloudy to dark to chrony.
i think you will need to enlarge transfert port with higher plenum if you want to increase you power
Hi loic
What parts do you need pics of? Lol I have to be real careful tearing down this stuff from SPA the one pistol I bought I ended up screwing up the trigger so bad the hammer wouldn’t set.
Artemis claims 265cc air tube. Not gotten around to the TP sizing yet. But from a couple glances it has a set screw plug at the bottom of the breech. Pulled the China reg reset the huma from 140b to 150b not light enough for chrony yet. Been raining for 2days so I chrony when it breaks.
Huma 150b hst 0 to full 0/650 one half turn 674 one turn 697 one and one half turn 718 two turn 746 two and one half turn 766 three turn 770 three and one half turn 803 four turn 811 four and one half turn 815 FH 814. Fun one mag at four and one half turns in. 811/813/810/810/811/807/809/809 hi 813 lo 807 av 810 Es 6 sd 1. Barrel TP is 4.46 by my cheap harbor freight calipers lol so it should be damn close.
could you make picture about plenum and transfert port size?
i think you will need to enlarge transfert port with higher plenum if you want to increase you power
Try testing the Huma reg between 130 and 150 bar.. if you cant get 900fps somewhere in that reg range you will need to check your plenum volume and transfer port size
On the huma I’ve got it up to 140bar and 25.3 are only making 770/780. I don’t see it making 900 I’ll still try 150. Next time down I’ll check plenum size and try measuring the TP. There are some reports of the p15 making over 900.
You have a Huma reg for it now right? Why are you still faffing around with the chinese one in it?
Try testing the Huma reg between 130 and 150 bar.. if you cant get 900fps somewhere in that reg range you will need to check your plenum volume and transfer port size
i did change out washers these are the washers that were in the dominator reg. I haven’t even tried adjusting this reg yet. I give the three washer thing a shot. But not till I try raising the pressure again.
i think you are right you need to change the belleville washer
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Yeast that will be fine