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muzzle brake

A place to ask general spud cannon related questions.
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Unread postAuthor: POLAND_SPUD » Tue Jun 10, 2008 12:18 am

so what is it that this is going on..... most of my pneumatics I would like to make louder!!

At 400 psi they are too loud - it's 'cool' (for a while.... )
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Unread postAuthor: hyldgaard » Tue Jun 10, 2008 4:30 am

POLAND_SPUD wrote:
so what is it that this is going on..... most of my pneumatics I would like to make louder!!

At 400 psi they are too loud - it's 'cool' (for a while.... )


at 500psi even a 13mm launcher is so loud that its not even funny to begin with.. I must admit im having a hard time understanding why he wants his launcher louder too :D
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Unread postAuthor: jackssmirkingrevenge » Tue Jun 10, 2008 5:11 am

hyldgaard wrote:I must admit im having a hard time understanding why he wants his launcher louder too :D


Same here, I always strive to make my launchers as quiet as possible, though perhaps living in an urban area this is more of a need than a choice. I can understand the need for a muzzle brake to mitigate recoil in the case of a large launcher, but the damage should be more important than the noise ;)
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Unread postAuthor: subsonic_karet » Wed Jun 11, 2008 1:19 pm

jackssmirkingrevenge wrote:
subsonic_karet wrote:2)muzzle brakes work best on smaller calibers.


crap... quick, go tell the Russians!... but for your own safety, don't tell everyone :D

Spudguns are relatively low pressure devices, however they compensate for this by using larger surfaces - compare spudgun calibres to firearm calibres, for starters. Therefore there's no reason why muzzle brakes on spudguns cannot be effective, if made large enough.


Comparing medicine balls to pingpong balls there. While the MSTA-S is a large(very large @ 152mm) caliber, the pressures used to propel it's 20.5kg warhead 22km is extremely high. This is where # 3 comes into play.
myself wrote:3)muzzle brakes work best with high pressures.


Another key note would be, I did say 'work best'. This doesn't negate the effectiveness of muzzle brakes on your average spudguns. If your average spudder is able to fabricate an effective brake you might see an actual reduction in recoil of a larger percentage. For the spudder that puts a cross-tee on his barrel, the effects are more psychological as too how much it is actually reduced. Efficient and effective muzzle brakes require levels of machining that your average spudder does not have access to. A cross-tee or a pipe with holes drilled in it is the equivalent of a plastic soda pop bottle silencer. Yea, it sort of works.

Low pressures and large surface areas do not work well, regardless of the size brake. If you start with a low pressure like average spudguns you don't have much to brake. Reported effectiveness is psychological.

You might want to google Chuck Hawks, thehighroad.org. Just googling muzzle brakes returns a lot of crap.
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Unread postAuthor: marpat » Wed Jun 11, 2008 2:28 pm

im building the cannon to scare the birds away
:D cuz there always pecking a whole in our siding
the goal is to be humane to the bird cuz im not allowed to shoot them with my .22 in the 'burbs
so making it really loud without shooting them is the goal
any suggestions for blanks that are really loud but dont travel far
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Unread postAuthor: hyldgaard » Wed Jun 11, 2008 2:53 pm

marpat wrote:im building the cannon to scare the birds away
:D cuz there always pecking a whole in our siding
the goal is to be humane to the bird cuz im not allowed to shoot them with my .22 in the 'burbs
so making it really loud without shooting them is the goal
any suggestions for blanks that are really loud but dont travel far

You should look into using a burst disk without ammo, that will definately make your launcher louder :D
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Unread postAuthor: jackssmirkingrevenge » Wed Jun 11, 2008 3:12 pm

subsonic_karet wrote:Another key note would be, I did say 'work best'. This doesn't negate the effectiveness of muzzle brakes on your average spudguns. If your average spudder is able to fabricate an effective brake you might see an actual reduction in recoil of a larger percentage. For the spudder that puts a cross-tee on his barrel, the effects are more psychological as too how much it is actually reduced. Efficient and effective muzzle brakes require levels of machining that your average spudder does not have access to. A cross-tee or a pipe with holes drilled in it is the equivalent of a plastic soda pop bottle silencer. Yea, it sort of works.


You'll find people with various levels of commitment to their designs, and it's not beyond the competence of many members on here to build on the well proven theories of full bore muzzle brakes and apply them to spudguns. The same applies to the "real" world, the PPSh-43 is a good example, the brake is simply a steel strip welded over the muzzle with a hole drilled through it - "sort of works" is enough sometimes :)

subsonic_karet wrote:Low pressures and large surface areas do not work well, regardless of the size brake. If you start with a low pressure like average spudguns you don't have much to brake. Reported effectiveness is psychological.


Works well on sailing boats before the bernoulli's principle was discovered, of course ;) - correctly designed, there's no reason why they should be effective - and if you have a browse through some of the more powerful projects in the showcase section, you'll see that there are plenty of launchers that can do with a bit of recoil mitigation :)
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Unread postAuthor: drex » Wed Jun 11, 2008 8:10 pm

here is a muzzle break that i started to make a wile ago until i got sidetracked :roll: by other things. i need to get around to finishing it.
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unfinished pvc muzzle break :)
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Unread postAuthor: VH_man » Wed Jun 11, 2008 8:27 pm

one thing i have run into a problem with with spudgun muzzlebrakes is that the brake will sometimes "tip" the projectile off track....... which is relatively problematic.

only way to solve it is a bigger hole....

and DREX.... WOW that looks sweet. finish that.....
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Unread postAuthor: Stifler69 » Sat Jun 14, 2008 8:39 pm

Nahhh Nahhhh Nahhhh,

ok, this website has helped me so much with making silences for all my guns... you can build them out of basicly anything that would want hahah
....
http://www.instructables.com/files/deri ... MEDIUM.jpg

http://www.advancedspuds.com/silencer.htm

these are really easy to build and they have worked like a charm with everything for me.

hope any of it helps.
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Unread postAuthor: jackssmirkingrevenge » Sun Jun 15, 2008 1:28 am

Stifler69 wrote:Image


The holes in the external tube are completely unnecessary and defeat the whole purpose of a suppressor which is to contain the propelling gasses and give them time to expand before they exit the muzzle after the projectile does.
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Unread postAuthor: THUNDERLORD » Sun Jun 15, 2008 1:57 am

@JSR, I was thinking the same thing only didn't want to get into a long explaination.

Also, One big reason for the muzzle brake design is reduction of the blast visible to the firer. The flames can mess up the shooter's night vision.
Regardless of pressures and velocities.

Also for military stuff the blast being directed sideways reduces the more visible blast upwards and dust blast from downward.
The side vents facing rearward are probably to reduce the visible cone shaped cloud in front a little. Besides reducing recoil.

BTW cool brake design drex. Thanks for the pics. 8)
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