Prototype Muzzle break
- Thread starter J E Custom
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Hired Gun
Well-Known Member
How did this test go?
We test brakes all the time with hi pressure water 100 psi or air at 180 psi. I like the water test better because you can see it so well. We even did one on steam. All 3 methods give the same results. In our testing we have observed it appears that all muzzle brakes the first port or row of ports does 95%+ of the venting or redirecting and just a trace through the second. Any holes beyond that have negligible activity.
J E Custom
Well-Known Member
The test went well and I should have it on U TUBE soon (some editing to shorten for viewing)
I did the water test and it worked OK but with over 10,000 psi in actual use it was not as
conclusive as the actual testing.
I found the same thing you did about the first port taking most of the volume of water being
discharged. this is one of the reasons that more small ports seem to do a better job of distributing
the gas.
This all led to one conclusion. More small ports are more efficient than two large ports of the
same volume.
Also these test were the reason I went with progressive port angles in order to improve the efficiency
of each port as the pressure drops through the brake as each port is opened and the greater angle
contributes as much recoil reduction the last.
The common thinking is, big is better. Some breaks have only one large hole and do a pretty
good job recoil reduction but the muzzle blast is terrible. so I decided to go with more small
ports and direct the gasses farther away from the shooter, lowering the shock wave and the
sound felt/herd by the shooter and reducing the recoil close to 50%.
Look at the original video and you can see the difference in the gas/fire coming from the two
different designs. Both brakes have the same calculated volume but the amount of fire/gas
coming from the prototype was almost non existent. and as a very smart friend pointed out
to me , anything coming out of the front of the brake is recoil.
I don't claim to have designed the best brake ever, but it is just as effective as others and also
addresses all of the bad traits of brakes in general. It,s kind of like having your cake and eating
it.
I have placed some of these brakes in the hands of our shooters for independent testing
and comments. (I may be seen as biased) so I want to hear from these shooters.
Thanks for your suggestions and comments, your opinion is respected as is others on this site.
J E CUSTOM
Hired Gun
Well-Known Member
I have often thought that some brakes are so loud because they inadvertantly made them into a whistle. I wonder just how loud one could be made if it was purposely made to whistle like a steam whistle. The more gas the louder it would be. 10,000 psi? This would assure you privacy at the range.
Hired Gun
Well-Known Member
It just occured to me it would be real easy to build a brake dyno at home. It would be real easy to measure the thrust positive or negative of any brake with a fixture connected to a scale or hanging and using a swing scale to measure the force. Then use regulated compressed air or fluid through it and see how it "pulls." This test would be completely unbiased.
barnesuser28
Well-Known Member
I think a cool test would be to put the rifle on a piece of smooth laminate and take 3 frisbees and put one under each of the bipod feet and one under the butt of the rifle. Then tie a string to the trigger and shoot three with and three without the brake and average the distance the rifle traveled. That way, with reasonable accuracy, you can calculate how much of a reduction (percentage wise) the brake has on recoil and how it compares to others.
J E Custom
Well-Known Member
Very interesting Feenix. I will study it more.
We looked at the load sell and most of them did not have the range that was needed and the speed
to give an accurate reading.
We did not look at this system because of price. The friend that shot the video built a sled system
with springs and ball bearing tracks with a tell tail to measure travel against the springs and we intend to test it out using a known standard as our bench mark of 24 ft/lbs. it will not give exact
numbers but it should be a good tool for comparison of one brake to another.
To Barnesuser 28 we did the free rifle test using the Barrett M82 AI and with my brake it only moved 7 or 8 inches with the factory brake I had to catch the rifle as it tried to do a triple salchow (Or back
flip to us rednecks). I was afraid to fire it on a slick surface for fear of it going into a different zip code.
It would be nice to have a reasonable costing recoil tool but for now it will just have to be our
shoulders.
Keep the comments coming.
J E CUSTOM
J E Custom
Well-Known Member
Very interesting Feenix. I will study it more.
We looked at the load sell and most of them did not have the range that was needed and the speed
to give an accurate reading.
We did not look at this system because of price. The friend that shot the video built a sled system
with springs and ball bearing tracks with a tell tail to measure travel against the springs and we intend to test it out using a known standard as our bench mark of 24 ft/lbs. it will not give exact
numbers but it should be a good tool for comparison of one brake to another or brake or no brake
comparisons.
To Barnesuser 28 we did the free rifle test using the Barrett M82 AI and with my brake it only moved 7 or 8 inches with the factory brake I had to catch the rifle as it tried to do a triple salchow (Or back
flip to us rednecks). I was afraid to fire it on a slick surface for fear of it going into a different zip code.
It would be nice to have a reasonable costing recoil tool but for now it will just have to be our
shoulders.
Keep the comments coming.
J E CUSTOM
I did a lot of electro-mechanical prototype and manufacturing quality control testing in the early 1980s that involved tensile strengths, force, etc... some of which are push/pull testers with various equipment but Chatillon is the only one that comes to mind now. I've been out of the machine shop/manufacturing for so long now but you could probably rig up a push-pull gauge system for under $100 from the link ...
Push Pull Gauge in Metalworking Inspection Gauges | eBay
Good luck!
barnesuser28
Well-Known Member
This is where i got the frisbee idea. [ame=http://www.youtube.com/watch?v=cI-xGYkLOc4]Testing APS Pain Killer muzzle brake - YouTube[/ame]
For shock and awe, I like this demo better ...
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barnesuser28
Well-Known Member
I laughed so hard, my stomach hurts.
