 |  | | | |  | |  |  | What does a compensator do? |  | |  |  | |
 Posted: Wed Sep 23, 2009 7:27 pm |
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| EricH61 |
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| The Beretta FS92 has an optional "compensator". The Walther CP88 compensator also comes with a longer barrel so I understand the value of that combination but what does a compensator on its own accomplish? |
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| Posted: Wed Sep 23, 2009 10:41 pm |
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| AirGunEric |
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"compensates" for poor weight distribution.
Not to be confused with a "brake", "suppressor" or "flash arrestor". |
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| Posted: Thu Sep 24, 2009 9:46 am |
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| Slavia |
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A compensator is a specific type of muzzle brake designed to reduce "muzzle climb" by rediricting combustion gases upward. Probably not real effective on an airgun:
http://www.cruffler.com/trivia-May01.html |
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| Posted: Thu Sep 24, 2009 10:34 am |
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| broommaster2000 |
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A compensator compensates, hurr hurr...
Agreeing with previous posts. Some compensators are placed not just upward, but also made to point a bit to the side. I've seen some models of the AK 47 feature this, maybe to compensate for trigger finger? |
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| Posted: Thu Sep 24, 2009 3:43 pm |
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| fritz |
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The AK-47 does have an actual problem with the action that makes it recoil to one side and up at the same time. This is solved (for the most part) on later models with a muzzle break that is on the bottom of the barrel to the opposite side it moves to. The redirection of gasses helps a lot.
IIRC the micro UZI also has this problem, it recoils up and to the left.
Really, unless you have a fully automatic airgun (which you don't, AFAIK) the "compensator" is useless.
I'm sure a "compensator" could easily be given a Presidential solution which would make it into a suppressor. |
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| Posted: Sat Sep 26, 2009 9:45 pm |
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| EricH61 |
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Thanks guys, that's helpful. The FS92 seems balanced well enough so I' won't bother with it. I'm enjoying the pistol, put another 200 rounds through it yesterday  |
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| | | | | | | | | what does a compensator do? | | | | | |
| Posted: Tue Sep 29, 2009 12:30 pm |
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| donwalk |
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| on an airgun...little to no good...maybe for aestetic looks...the recoil from springers is generated from the spring, NOT from the compressed gasses propelling the pellet down the bore. the PCP and CO 2 rifles i have generate NO recoil so a compensator is not necessary. |
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| Posted: Tue Sep 29, 2009 12:37 pm |
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| oddtodd |
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| I have a compensator on my 2240. I like the little extra weight out there because it keeps the shakes down for me. THe meds I'm on give me slight tremors and that compensator helps knock it down some just by the weight out at the end of the barrel. That's the only reason it's there for me. |
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| Posted: Tue Sep 29, 2009 2:29 pm |
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| Slavia |
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A compensator isn't just a weight; it redirects expanding gases.
I have the same barrel weight arrangement on my 2240, and as oddtodd says, it makes it easier to hold steady. After shooting it for a few years I drilled ports on the top, just to see what would happen. I didn't notice any difference.
Weights don't have to be coaxial with the bore to give that balance advantage. Here is an Anschutz unit:
They can also be adjusted to cancel barrel vibrations. This is a Ruger "harmonic dampener" (not ported, so not a compensator):
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| Posted: Tue Sep 29, 2009 9:25 pm |
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| EricH61 |
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| Slavia, what does "redirecting expanding gases" do for me? |
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| Posted: Tue Sep 29, 2009 11:22 pm |
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| Slavia |
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| Quote: |
| Slavia, what does "redirecting expanding gases" do for me? |
Probably nothing in an airgun. It's like a jet engine - squirt the exhaust up and the muzzle gets pushed down. Call it a muzzle brake (like on a Barrett .50 BMG) with the exhaust pointed backwards slightly and it helps cancel rearward recoil. It's all Newton's 3rd. Law - the "equal and opposite reaction" one. Mass times acceleration of the gases equals mass times acceleration in the other direction (on the gun). I don't think you'll get enough mass or acceleration out of an airgun blast to make a difference. If you have a compensator on an airgun, it's probably there for looks.
There is one good (airgun) reason to redirect the gases at the muzzle, and that is to prevent turbulence from upsetting the pellet's flight. Here we're not talking about "compensating" the gun's movement, but rather
"stripping" turbulent air away from the pellet. Take a look at kanyon's creation - it's really a thing of beauty:
http://www.airgunhome.com/agforum/viewtopic.php?t=3486&highlight=stripper
What airgunners call a "muzzle brake" really doesn't do any braking at all - it's just a weight. But a useful weight:
1. It helps dampen vibrations
2. It changes the balance of the gun (as you've seen that little bit of weight can reduce "muzzle flip")
3. It covers and protects front sight dovetails/screwholes
4. It serves as a cocking aid on break-barrel guns
5. It protects the muzzle crown
6. It looks cool |
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| Posted: Wed Sep 30, 2009 12:50 am |
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| CristiV |
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| Posted: Wed Sep 30, 2009 7:19 am |
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| EricH61 |
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| Very interesting, especially the "turbulent air" thing for air guns. Anyone have any scientific data other than one poster being able to shoot tighter groups with winchester pellets? |
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| Posted: Wed Sep 30, 2009 10:09 am |
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| Slavia |
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