SpudFiles

THESE PLANS ARE ORIGINALLY FROM http://www.geocities.com/fiebigspudguns/SPAC1.html THIS IS NOT MY PLANS CAUSE I FOUND THEM ON THE NET AND I AM NOT TAKING CLAIM FOR THESE PLANS I JUST WANT TO SHARE THEM


Things you will need.

Some 3 inch DWV (this does not need to be pressure rated) pipe,
Two 3 inch couplings,
Two 3 inch to 1.5 inch bushings (reducing couplings would also work)
And three cheap 69¢ funace filters (you could also use cotton- anything that will absorb sound).

On the inside of the bushings (or reducing couplings, whichever you chose) there is a lip to prevent the pipe from sliding all the way through. you will need to file this down so the pipe will go all the way through. I rreccomenda dremel tool, a file would take a really long time. Since the bushings ddon'tfit directly on to the pipe, you will need the couplings. once you have prepared all the pieces, test fit them to make sure you know where yyou'reputting them.
You will not be gluing any parts of the silencer.

Once you have identified where you will be putting the silencer, mark it off. you will now need to drill holes directly into the barrel. These holes need to be very small, otherwise your potatoes will end up getting chopped up on the way out. I reccomend a 1/8 inch drill bit. You will also need to drill holes in the 3 inch pipe. I used a 13/64" bit for that.

After you have your holes drilled, put one of the couplings on the 3" pipe and slide it all the way down the barrel, leaving one end open so you can stuff it with the filter material. I managed to cram two 14x20x1 size filters in. Just wrap the filter tightly around the barrel then slide the 3 inch pipe over it (You will probably want to use gloves for this, just because the filter material is... mean). Once it's all crammed in, put the other coupling on and slide it over the holes in the barrel.

If done correctly, it will drasticly lower the amount of noise heard. On mine, it reduced it about 50%, enough so that all the neighbors ddon'tcome outside looking confused. It ddidn'tseem to loose any velocity, but I cant be sure.


How's it work?
Well the explosion you hear ddoesn'tcome from the chamber, it comes from the end of the barrel as all the gases from the explosion escape. It's like popping a ballon. If you pop a ballon, it lets all the air out very quickly so you hear a loud bang. But if you untie the ballon and slowly release the air it makes very little (if any) noise. So by drilling holes in the barrel, when the potato passes through the barrel, some of the pressure behind it is released slowly by the holes instead of all at once, which is what happens otherwise.

Also there are iinstrusionon how to maintainthe silencer and i will put them on here.

SO JUST TO REITERATE THESE ARE NOT MY PLANS BUT THEY ARE VERY HELPFUL FOR ME LIVING IN THE BURBS

You will also need to drill holes in the 3 inch pipe

This is an unnecessary complication that actually makes the silencer less effective.

ok i havn't tryed it yet i just thought i would share these plans with you guys as a helping hand

"This is an unnecessary complication that actually makes the silencer less effective. "

Not true, as far as I can tell. For my paintball rifle, I made a silencer with holes in the inner and outer pipe, the sound was reduced about 50%. I made another silencer of the same dimension for my actual paintball gun, but without the holes, because people said it looked cooler. The paintball gun's silencer reduces about 25% of the sound when put on the paintball rifle.

No offense but unless you have a decibel meter for an ear, percentages of sound reduction are meaningless, the perception of sound is a very subjective science.

A silencer works by trapping the propellant gasses long enough to expand within a vessel and therefore reduce their pressure until they eventually exit the muzzle. By making holes in the outer casing, you're letting the gasses out at high pressure before they've travelled the length of the silencer and have had time to expand and cool.

I'm not saying that a perforated outer tube will render the silencer completely ineffective, but there isn't a single commercially available silencer out there that is constructed in such a manner and there's a perfectly good reason for that.

It could make a difference because both my suppressors are on the very end of the barrel, and that makes it so the holes on the outside work. I also stuff a whole roll of fiberglass insulation in them.

I agree with jackssmirkingrevenge holes on the outside are not going to damper the noise it mat a little bit but not to the extent that you want.
Look at how real silencers are made and adatp it to the PVC

Bubba

I did build a supressor for my .22 a while ago. Used all PVC parts, used encaps with 1/4in. holes drilled in the center for baffles, the way real supressors work. Worked great, turned the sharp crack into a more drawn out, but still quite audible ktchchhhfff noise, not the little mousefart noise on TV, but still quite a noticible difference.

Unfortunatly, because I was young and uneducated (5 months ago), the supressor became misaligned with the barrel after a few shots, resulting in the bullet striking the furthest baffle and shattering the whole thing in a very dramatic manner...

Still cry from time to time about that... D:

Your never going to get that mouse fart noise they use in the movies or on TV coz thats the sound of a blank going off thru a silencer. I really dont see the point in fireing blancks at targets do you?

Bubba

Bubba05 wrote:You're never going to get that mouse fart noise they use in the movies or on TV coz thats the sound of a blank going off through a silencer. I really dont see the point in firing blanks at targets do you?

Actually some 0.22 weapons with good suppressors are remarkably efficient.





Also, there's a series of russian weapons that use "closed circuit" cartridges (like the PSS semi auto and S4M derringer) where no gas actually escapes from the muzzle, meaning all that's heard is the noise of the striker hitting the cartridge

Yeah ok mate and in any of those videos was a silencer that made the hi pitched wistel that you hear on the movies or on TV. To me they sounded like stock standard silenced weopons? and the two pistols mentiond are low velosity close combat weopons used up to a max range of no more than 15 feet. Not doubting the fact there silenced or they make no sound at all, and the fact the .22 calaber.
What I was getting at is when you see and hear that "mouse fart" on TV or at the movies they always seem to come from hi powerd riffles or 9mm pistols. as I said the sound that is most commonly recognised as the sound a silencer makes is from fireing blanks through them. as a blank round carrys no projectile and 3 times the amount of powder the desired sound is caused. In the time i have spent around weopons and my time in the forces I have never hurd a weopon firering a projectile through a silencer make that same sound.

Bubba

I know what you mean, take this scene from "Once upon a time in Mexico" for example:



The mouse fart sound was coming from a silenced revolver *gasp*

Aside from the fact that the revolver was ridiculously tiny, it's impossible to silence a revolver due to gas escaping the gap between the cylinder and the barrel (unless it's a Nagant 1885)

Funny it can be done but takes a sh@t load of modifications to the revolver to ge it to go quiet. But im not going to say how i know this! I could get in trouble!

Bubba

as far as I know the Nagant is the only revolver that can be silenced effectively due to its gas-seal mechanism.

The gas sealed cylinder, mentioned above, was made to use all of powder gases to propel the bullet (in most revolvers some gases escape from the gap between the cylinder face and barrel breech). To achieve that, the cylinder moves ahead a bit when hammer is cocked, enclosing a barrel breech area with recess in the front of each chamber. The cartridge, unique to that design, had long case with tapered mouth and a bullet totally enclosed inside the case. When cylinder moves forward, the cartridge case mouth entered the barrel breech and was used as additional seal. This was a complicated mechanism, useful mostly when guns were used with silencer.

Keep looking mate! If there is a will there be a way!
If your interested i can go into detail on how it's done but why would you really wanna know?

Bubba