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silencers

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: ALIHISGREAT » Mon Jan 21, 2008 5:45 pm

possibly I could add a ballvalve between to sections of chamber that could be closed to cut the volume volume when needed


interesting idea but i would never deliberatly spend money on something to reduce the power of my cannons, the only way i would do it would be to lower the pressure for quiet shots.
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Unread postAuthor: jackssmirkingrevenge » Tue Jan 22, 2008 12:52 am

ALIHISGREAT wrote:interesting idea but i would never deliberatly spend money on something to reduce the power of my cannons, the only way i would do it would be to lower the pressure for quiet shots.


Ah, but small chamber-high pressure gives better power than big chamber-low pressure...
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Unread postAuthor: Ragnarok » Tue Jan 22, 2008 2:01 am

POLAND_SPUD wrote:Acctually I am usually using them - but even when I have them on is quite loud above 300 psi

You may have a problem with the things then. What's the low frequency attenuation on them?

As I said before, HEAL uses a much larger volume of air than that and dumps it much faster - even though my defenders aren't great, it's not that loud with them. I'm considering buying a better set with higher protection, just to be on the safe side - because, as I have said elsewhere, the males in my family have a nasty tendency to lose their hearing in middle age (both my father, his brother and their father have/had hearing aids), and so I want to take as many steps to protect my hearing for as long as I can - I avoid what some people do with ear phones so loud you can hear them from across the room*, and all kinds of things.

*Reminds me of a great quote from Griff Rhys Jones at Live Aid (at the Wembley stadium):
"I'm sorry to interrupt, but we have had a bit of a complaint about the noise ...... from a woman in Belgium."
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: POLAND_SPUD » Thu Jan 24, 2008 5:27 pm

Ragnarok... my ear defenders are ghetto earplugs.... I made them myslef so I don't expect them to work as good as off the shelf ear defenders...

Today I joined two 2L bottles inline and suprisingly this design works quite well... so well that I can shoot my gun in my basement at 320 psi without any problems....
suprisingly it works better when the bottles are not perfectly tight joined - so when air can escape/leak when firing (tested at 320 psi )

the whole thing was very easy to build and it is as much ghetto as it can be :lol:

I am still going to test the same thing with baffels or try filling the silencer with some wadding....

pics soon
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Unread postAuthor: POLAND_SPUD » Fri Jan 25, 2008 9:38 pm

Forget about my previous silencer - I built something better

I tried something new and I must say it is really something yhmmmmm.... new....?. I included a schematic in the pic....
I threaded the muzzle of my barrel and put there 1/2" T..... then I wraped a 1/2" nipple in some kind of cloth and joined it with the T.... then I did the same on the other end of the nipple and screwed another T on top of the nipple

my new silencer works almost as good as my previous silencer build from 2X2L bottles but it is much more compact and it also serves as a crude sight...

I must say that it is rather original since it doesn't have any baffles or even expansion chamber.... it works more less in the same way like a normal pneumatic muffler..... sometime ago I had an idea that this might work but I've never acctually tried this till today....

I suppose it could be improved by adding an expansion chamber - but generally it proves that silencers built on this princliple do work

PS. sorry for not adding pics of my previous silencer but I have so much to do these days that I spend the little time I have on testng new designs and improving my gun
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Unread postAuthor: Novacastrian » Fri Jan 25, 2008 9:46 pm

That reminds me of a surpressor setup for a tank that JSR posted a link to a while back. Any help JSR?
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Unread postAuthor: jackssmirkingrevenge » Sat Jan 26, 2008 7:00 am

Novacastrian wrote:That reminds me of a surpressor setup for a tank that JSR posted a link to a while back. Any help JSR?


You mean this one?

Well if I understood correctly it's basically a muzzle brake with a packed cloth "baffle", surprised to hear it works so well to be honest.
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Unread postAuthor: ALIHISGREAT » Sat Jan 26, 2008 7:07 am

You mean this one?

Well if I understood correctly it's basically a muzzle brake with a packed cloth "baffle", surprised to hear it works so well to be honest.


woah :shock: three words come to mind..... whats the point! [/quote]
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Unread postAuthor: jackssmirkingrevenge » Sat Jan 26, 2008 7:29 am

The point would be to reduce the level of discomfort of your neighbours when you're testing state of the art artillery systems in the vicinity of civillian habitation :)
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Unread postAuthor: Novacastrian » Sat Jan 26, 2008 8:47 am

Yes, that be the one! Thankyou for your help kind sir :D
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Unread postAuthor: POLAND_SPUD » Sat Jan 26, 2008 9:28 am

It doesn't silence the gun completely but it makes the "BANG" at 300 psi more quiet... it is more like a normal silencer at lower pressures.....

well i think that talking about level of sound and using words like "more quiet" doesn't give you any idea about this - I have to find some way to objectively compare sound levels.....

right now I am trying to determine whether it is possible to improve this... i have some idea... i think that i can improve this if i add an expansion chamber (ok it is obviuos) and increase the surface that slows down and 'leaks' the air out of the silencer
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