What is my regulator pressure ?
Hi
Can annyone tell me when I drop of the regulated pressure based on the shotstring I have made ?
Have searched the forums and youtube how to change regulator setting bud I don’t have acces to a regulator checker tool like Ernest shows and don’t want to open up the airtube risking damage and leaks if I don’t have to. I have found on the forum and youtube 115 a 120 bar is a good regulator pressure so If I am shure it is at wrong pressure I can start changing it with trial and error.
My question
At first looks on graphic its like the regulator is set at around 150 bar at about shotnumber 50 or is the spike between shot 50 and 80 acceptable and the regulator is set at about 115 bar?
extra info, This rifle is not at max speed, it can still be set to higher speed with the hst , I set to this speed for more amount of shots and lesser noise…
help is much appreciated
Dimitri
cant get the picture bigger, bud it can be clicked
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Viewing 12 replies - 1 through 12 (of 12 total)
Ernest,
Where do you get your 1″ Deline rods from?
and to confirm…
Regulator works most efficient with the HST set to to MAX (with minor adjustments of course) ?
(I changed my reg on a rifle but kept the HST at the original adjustment and my FPS started at about 800 and went up to 930-ish before dropping again which is horrible)
Have it for a little over a year now, not really counted the tins, maybe around 3000 shots probably more.
Thanks Sir ville, will try that this evenening and hopefully go to my range and do another chrony string.
Verstuurd vanaf mijn C2105 met Tapatalk
To adjust the valve spring the tension is counted by turns in from the “touch down” = where the plate contacts the spring. So – from the point of contact, if you turn in even a bit more it starts to pre-tension the spring. That’s your “zero”.
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How old or new is your Cricket, how many shot fire so far ?
~ GKU
Hi
First I want to thank you Ernest for your great videos, I watch and learn from them a lot great work !!
See there are other treats people discusing same, bud want to post an update.
What I did
turn 1/4 clockwise on reg
hammer spring at max
turned valve spring (wrong I think)
I think valve spring is not tight enough, and that is why I use to much air suddenly. When is the right time to turn 2 full turns? Slight contact with spring or really flat on the spring and already feel pressure on the valve stem when u press it with thumb?
My shotstring is shorter bud I think balance between shots on reg and falling off the reg is starting to look good (not counting under minimal pressure offcourse). The shots on reg and of reg (bel curve) are almost in the same speed and then pressure drops of at 100- 90 bar and time to rifill
Now I must solve that terribel air consumption problem .
I want to stay in that 265 m/s speed.
So if I tighten valve spring that speed will drop again and need to up my reg pressure a little ccw to get back at 265 m/s probably.
All this takes a lot of work air and pellets, did most testing with the delrin rod stick in the airtube. The last full shotstring I waited to get to my range to shoot over chrony while I was having fun in the meanwhile.
It is not just turning some screw in or out bud al the springs and screws work togheter to get the good result. One screw gets a turn and then another must be set to the other screw or you get bad result , getting a little crazy from it.
first (green) graph is factory setting
factory string tune string
1 258 265,5
2 257 265,5
3 257 263,6
4 258 265,4
5 260 264,9
6 258 264,5
7 258 264,5
8 258 264,5
9 258 265,3
10 261 265,4
11 260 266,3
12 259 261,4
13 257
14 257 262
15 257 263,7
16 257 263,7
17 258 263,8
18 257
19 257
20 256 265,3
21 257 265,2
22 259 264,7
23 258 264,4
24 259 264,6
25 259 265,2
26 259 264,2
27 260
28 258
29 258 262,4
30 260
31 258 263,3
32 258 263,8
33 258 262,5
34 259 264
35 258 263,2
36 259 262
37 259 263,9
38 259
39 261
40 258 reg
41 259 263,4
42 260 262,7
43 259 265,2
44 260 264,6
45 259 266,2
46 257 265,2
47 257 265,4
48 257 264
49 258 261,7
50 257 261,9
51 255 259,4
52 257 259,4 100 bar
53 254 260,1
54 256 258,4
55 255 reg 258
56 252 258,2
57 256 256,4
58 255
59 256
60 256
61 257
62 258
63 259
64 258
65 260
66 261
67 263
68 262
69 260
70 260
71 260
72 260
73 259
74 257
75 258
76 257
77 256
78 255
79 255
80 254
81 252
251 100 bar
Dimi
Listen to Ernest and back it down ( go clockwise = close) to 110-115. As assumed that would be about 1/6-1/4 turn in.
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ok, I will try that first , thank you
It is a .22 standard version
Dimi
I don´t think your reg is set at 150-155 B from the factory. Haven´t seen any set that high anyway. The speed is probably changing due the pressure getting lower in the tube = the hammer spring is able to push the valve pin “further” and keep it open a nanosec longer = speed changes. Your reg is probably set at around 130B (depending which cal) so if i was you i´d start by turning it down about 10 min (1/6 of a turn) and test. Do as Ernest told you and play with the HST adjuster to see where the velocity peaks before it starts to slow down again. Just my :2cents: …
I used a 1″ Deline rod that fill 3/4 of the air tube. 3 different length to fit all 3 length air tube. I remove the rod from the fill end if I’m satisfied with the setting.
Thank you Ernest,
I understand I think ,so the most constant shotstring is achieved by setting the speed with the regulator and not with hsta, setting hammer is only for minor adjustments.
Hard thing for me will be to set the regulator to 115 bar with no tester tool and simply do crono test and watch were shotstring changes and read bar of manometer .
Have seen a nice trick by the arab guy on youtube, he puts a wooden stick in the airtube when testing the regulator that takes up a good amount of space to save air.
Kalibrgun made it really hard by putting on a manometer that is not correct , my diving bottle reads 220 bar and cricket manometer reads 200 bar , diference of 20 bar :confusedn: . In my shotstring graph I put the bottle manometer pressure because I assume that manometer from bottle is of better quality.
At shot 50 my string is starting to change and that was around 155 bar ,I have read 1/4 of a turn on the regulator is good for 20 bar, so I have to do almost 1/2 of a turn to be close to 115 bar, I hope this theory is correct?
Dimitri
The reg is most consistent when at max speed, and only minor adjustment with HSTA to lower the speed no more then 20fps—> if you do it will look like your shot string.
Lower reg pressure to 110 to 115b with that pressure your in the 865-880, max the speed till it level off, if the speed start to drop back off HSTA 1/4 CCW STOP! Crony and check accuracy. Not all reg, springs are equals and results my vary. Shot 67 is the hight of the bell curve when off the reg.
Viewing 12 replies - 1 through 12 (of 12 total)
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Did another shotstring with the valve spring at the two turns and the reg from 1/4 from factory setting a little back to 1/6 from factory setting.
I am pleased 😀 , got a good 15-20 more stable shots from a 200 bar fill to 100 bar
and why we do all this for offcourse…
aimed at a 4 cm buy 3 cm metal plate @ 100 meter during chrono and hit it about every time during whole shotstring and a miss was probably my fault,
bottle cap was also no problem,not as frequent offcourse as the plate.
I love this rifle 😀