How many BARs you need for one magazine
In my case cal.22 18 grain 880fps 21bar/14shots.
What is curious for jumbo pellet 275mps I have 20bar/14 shots. Shouldn’t be less bars?
All Replies
Jan, I really enjoy having a large amount of shots for my backyard shooting sessions. The power level of my Cricket is good enough for up to 40 yards of shooting.
Hi Gladiator, try to increase regulator pressure. Now I have 130bar on regulator and I have 20bar/14 shots from 220-200bar. Valve spring 1/2turn after the contact. Just try slightly higher reg pressure. You will see if it is improve.
Wow Spinj you have huge shot count on this power 😛
Because my Cricket’s power has been turned down to shoot at 8.8 FPE (that is, 527 FPS using 14.35 gr. pellets with an extreme spread of 20 FPS), it consumes only .39 BAR per shot. I fill my gun to 220 BAR and the regulator cut-off pressure is 50 BAR. From this pressure fill the total number of shots is 430. Taking this information into account, each magazine therefore uses up 5.534 BARs. Here’s the breakdown of the math performed:
220 BAR – 50 BAR = 170 BAR expended volume from air tube
170 BAR / 430 SHOTS = .395 BAR used per shot
.395 BAR x 14 SHOTS = 5.534 BAR used per magazine
430 SHOTS / 14 SHOTS (magazine capacity) = 30 MAGS and 10 PELLETS in total used
Hi Octavius.
Pellet Jsb 16 grains
Average of 913 fps
Regulator work pressure 110 bars
In my case from 250 bar to 110 bars
250 bar to 225 = 14 shots – consumption of 1,78 bar per shot
225 bar to 200 = 14 shots – consumption of 1,78 bar per shot
200 bar to 180 = 14 shots – consumption of 1,42 bars per shot
180 bar to 160 = 14 shots – consumption of 1,42 bar per shot
160 bar to 140 = 14 shots – consumption of 1,42 bar per shot
140 bar to 120 = 14 shots – consumption of 1,42 bar per shot
120 bar to 110 = 05 shots – consumption of 2,00 bar per shot
As you can see the valve efficiency improves from 200 bars to 110.
Regards,
Gladiador.
:rofl: :rofl: :rofl:
:rofl: 😆 ok BAR=Pressure
How many Bar´s do i need for one Magazine ? Usually one Bar is enough – if i drink enough Beer while there. I shoot one mag and visit the friendly, local Bar. Usually there will be no more shooting that day after the friendly Bartender has served me a couple of hours or so. :butkick:
Today was slightly slower wind than 4 days ago so I tried shoot full shot string. I have started from 222bar with set speed to 880fps. I got nice 5 magazines now. Ending pressure 119bar 😆 Valve spring 1/2 turn after contact. Reg. pressure 130bar. I think ideal combination for people who wants max. velocity 906fps – cricket standard cal.22. jumbo heavy 18grain
My new setup 🙂 I set 130bar on regulator, valve spring 1/2 turn after contact with aluminium retainer. Definitely 1/2 turn is the best valve setting for my cricket. I experimented with 1/4 turn after contact and does it huge air consumption. 1 turn after contact is unnecessarily because I lost some velocity…
Today I made the test configuration above and from 220 bar to 200bar a finally got 14 shots 😛 😉 Speed 880 fps / 18.grain JSB. HST spring is from Greg 2″ long stainless steel one.
Lol, I hear you :rofl:
I got the Idea from my .177 cricket (now sold) it came in 10j or 7,4 fpe and the previous owner had put a plastic pipe in the receiver tp that fit almost perfectly, it had a smaller ID because it is a smaller burst of air in 10j. So I was thinking maybe it could be used for more than just that if the hole was the perfect size…
Yes Cricket it make sense. But what doesn’t make any sense is TP´s made by Kalibrgun :biggrinn:
My friends cricket 22 std year 2015!!! is it ok??? 🙄
– FIRING VALVE= 4,30mm
– RECEIVER= 5,00mm
– BARREL= 4,1mm
—————————————————————–
Greg´s cricket.
Here is my TP sizes for my Cricket 22 std:
Firing Valve: 4,56mm
Receiver: 5,25mm
Barrel: 4,50mm
—————————————————————-
My cricket.
Here is my TP sizes for my Cricket 22 std:
– FIRING VALVE= 4,50mm
– RECEIVER= 5,00mm
– BARREL= 4,3mm
– RECEIVER= 5,00mm
– BARREL= 4,3mm
What would happen if you created a “pipe” with an ID of 4,50mm and put it in the receiver TP? Then the firing valve tp would be the same size as the receiver tp, would that increase efficiency? Obviously you would have to line them up perfectly, it just seems as the air going from 4,5mm into a 5,0mm space and then into a 4,3mm space would be inefficient to me. Would it not be better to go out 4,5 and through 4,5 space and then into the barrel 4,3?
If that makes any sense
Hey Greg, I can´t remember on behavior when reg. was set to 130bar. What I remember first shot was slower then second. I may try to set it to 130bar again and make test from 220bar with one magazine in same speed.
Readjust down the HST to 880 fps
But first I would try to do your second hint with reg. setting 125bar 🙂 First I will set maximum speed with HST let say 273mps/895fps and then I strip the gun and add 1/4turn CW on valve retainer and check the speed. If speed will be 890fps/271mps I can leave there.
I’m afraid to enlarge TP on firing valve too 🙁
Did you try when setting reg to 130bar.
Adjust valve spring setting to get max JSB 18g at 890 fps.
Readjust down the HST to 880 fps and check the air efficacy there ….. ?
other option is to increase valve TP size a littler more so …….. if so set reg to 120-125 bar to test.
~ Greg
- You must be logged in to reply to this topic.
Wow Spinj you have huge shot count on this power 😛
I Octavius,
Let me prepare a Reg. calibrator and them for sure I will take care of you advise.
Regards,
Gladiador.