let’s talk efficient airguns
So it appears that some people believe that the wildcat is the most efficient. …
Bear in mind that would be going off the manufactures specs wich are rated with 15.9 jsb’s
So what we know
The wc has a 230 cc airtube…
Vulcan has a 290 cc airtube
Cricket std. ??
Edgun std. ???
And the mutant. Has a 200 cc… I got 61 shots 881-890 on 220 bar fill
So which one can squeeze off more shots at the 890 fps range ?
Shooting 18.1s
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When you see this shot string from vulcan I found on yellow…
61 shots 881-890 Jsb 18.1 grain. with a 220 bar fill.
Same numbers and shot count I get too. This lead me to knowledge that the both regulators are amazing. It depends how carefully and precisely they set are.
That shot string right there is from My Taipan Mutant….
When i run a Shot string i Use the gauge from my fill setup, i keep it tethered but close the valve.
We also need to consider the pressure guage reading on each guns read differently, it could be off as much as 15b off, or more.
When I fill my Edgun to 210b, my hill pump read 220b and if I used my scba it read almost 230b. Which is off?
I do not want to uphold for the cricket regulator. But I think these regulators are pretty the same in efficiency question.
When you see this shot string from vulcan I found on yellow…
61 shots 881-890 Jsb 18.1 grain. with a 220 bar fill.
Same numbers and shot count I get too. This lead me to knowledge that the both regulators are amazing. It depends how carefully and precisely they set are.
The Vulcan seems to produce steady numbers. Wonder how it would fair. I’m not pumping any more so regulator performance is more of a concern
Sent from my Z30 using Tapatalk
EDguns are the best when it comes to air consumption. According to Ed …
😉
Endo….
Them results were with me adjusting the regulator (turned it down a smidgen ) And hst.
No polishing or any alterations.
According to the data you gave Matador has air effitiency as 8.1 cm3/Jole, in Taipan 6.9 cm3/Jole, very good result.
The study of airgun air efficiency is one of my interests. It can be influenced or determined by many factors (regulator setting/efficiency, valve dynamics, valve spring, transfer port, hammer tension…). I got some data to share on my Matador R3, which is known to be “the” air efficient gun. R3 has 289cc tube/reservoir volume. The out-of-box Edgun shoots hot (~920-940 fps) with JSB 18.1, and one of my earlier strings is shown in graph below (blue circle). The gun was filled to 192 bar. The speed dropped after 45 shots. The first 45 shots were analyzed, showing average speed of 927±2 fps with 9 fps max spread. The air efficiency was 13.02 bar-cc/FPE. After some tuning, reduced reg pressure and HST adjustment to shoot around 880-890 fps (JSB 18.1, green circle), the gun can have 70 shots (tube pressure from 193 bar to 100 bar) with average 886±2.8 fps and 13 fps max spread. The air efficiency was improved to 12.16 bar-cc/FPE. Yes, tuning the reg and HST can improve air efficiency and increase useful shot count.
Concerning Taipan Mutant, based on the available data, Dman showed a shot string not long ago, and I used his data to plot a curve (red circle) against my R3. From 220 to 120 bar, he had 61 shots, and the average speed was 885±2.1 fps (JSB 18.1) and 9 fps max spread (red circle). The air efficiency was 10.41 cc-bar/FPE. My tuned R3 consumes more air, although the average speed or energy is similar to that of mutant. Based on Dman’s posts, he only adjusted HST to shoot 880-890 fps, and the reg has not been touched (I might be wrong). The air tube volume in the mutant is much smaller (200cc). The design of the gun may be better, which contributes to the high efficiency of mutant in air usage. The Mutant is the most air efficient gun I have ever seen.
Regards,
Endo
Defenetely yes, but we are talking about the default effitiencey, as it comes “out of the box”. That depends more on the design of the gun. Thus if the “box” effitiency is better, the gun is designed better.
Ed wouldn’t you also agree that one gun may seem more efficient than another depending how the owner tuned his gun. For example if the shooter found the right regulator setting vs HST that gun may give a More consistent shot count than a improperly set up regulator/HST setting
The universal unit to find the effitiency of air gun is to calculate how many cubic cantimeter of air with atmosphere pressure is used for getting 1 Joles of energy. The less it is so the more effiitent air gun is. EDgun has effitiency in average about 8 cm3 per 1 Jole.
To calculate that you need to know:
1. The volume of reservoir
2. Start pressure in the reservoir
3. End presssure in the reservoir
4. Weight of the pellet
5. Speed of the pellet.
6. Number of shots.
So, using this you can calculate effitiency of ANY PCP airgun and compare them.
Ed
Jamie I think shot count is not the only factor to consider but also the FPS spread from shot to shot. So far in the .22 caliber Bullpup arena I have not seen a gun better than the Taipan (based on your numbers). I think the test needs to be caliber to caliber. I’ll provide the data for the EDgun .22 standard tomorrow. The test should be based on total foot pounds of energy produced by the gun until the gun falls off the regulator. That way if one gun is shooting a little hotter than another gun we will still be able to compare them. what do you think?
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Oh, sorry for my mystification. Thx dman for the info.