Experimenting with 3d printed baffles and ldc guts

[MrP]

Hello AGN. I've been 3d printing plastic baffles and monocores of my own design to try to tame the bark of my TalonP. Not interested in solving this with a $195 pre made ldc, though that would be easier. I'm in it for the tinkering. 



So I was told that I was not allowed to discuss the internals of these things when I tried starting a topic at GTA. But looking through here I believe this kind of thing is allowed on this forum? Everything I'm doing is 3d printed out of PLA so it's strong enough for the pressures of an air gun it would never have any application to a firearm since thin layers of thermoplastic will just shatter and melt. 


Anyone else here tinkering in a similar way interested in discussing strategies? I know there are likely discussion threads and books on this topic but I for one enjoy conversation so I don't mind learning some things that are available elsewhere through dialogue if anyone is interested.


I have some pretty quiet designs - latest one has the talon so quiet ay 35 fpe-ish that the noise of cocking the hammer and the hammer slap is louder than the report. I haven't used any or purchased any specially made airgun LDCs so I don't know what is a typical result versus an outstanding one. I've been experimenting with a high density of baffle layers in single core as my design. About 13 baffles per 10 cm. I was wondering if this might take up so much volume that it would end up being noisier but it's actually really quiet.

 

[Odoyle]

Pictures would help.

 

[MrP]

I tried. But timed out uploading I guess... Will try again. The photo icon starts a little upload animation and that's as far as it got. I see I can decrease image size... here goes

.

 

[Odoyle]

Looks very nice and functional for sure.

 

[Rj]

I've done a few and some worked quite well. Do you have an air stripper before the baffles? Incorporate one if you can. Carbon fiber tube from Ebay for a shroud and the possibilites are endless. 

 

[MrP]

The cores shown are set in an aluminum tube. Almost completely silences my Artemis even shooting at 16 fpe when it is usually quite loud. 

 

[Elis5173]

Try exporting the model at a higher resolution so you don't get those sharp lines in your model. It will come out alot smoother and seal better.

 

[MrP]

Thanks - will try a higher resolution print. Aren't the cones themselves air strippers? I was figuring as the pellet passes into the point of the cone in the air is diverted outwards. Perhaps I need look what an "air stripper" is 



Material has stood up fine and I figure I'm saving time but maybe I'm wrong. I'm just learning to use the printer so I know that variables like layer thickness and printing speed will have some effect as well. I have printed completely circular ones, the facets don't seem to really make much of a difference because I tend to wrap these in a little bit of some thing anyway to shim them into the tubes.



I have included a few photos of some other designs I'm trying out. I also did some stacked cups like those metal baffle cone types. All of these are working pretty well.

 

[MrP]

I have a lot of experimenting to do. I wonder about drilling small holes to vent those baffles. Or perhaps re-designing baffles to redirect air towards the rear of the gun. I even had one design involving turbo fans just for the hell of it figuring if the air was being used to rotate some mass then it wouldn't be used to make a noise. That was just kind of fun. But in one of my set ups there are fans spinning on the inside when the air hits them.

 

[bigHUN]

you can strip the blast first then take care of a sound, all shall fit in a shroud (a bit different design then this my, but I cannot use a sound altering device legally)

 

[MrP]

Thanks I can achieve this with a plastic form. Will see if it changes loudness or timbre when I get a chance 

 

[orion]

I tried once with PLA and after a couple of shots I destroyed the baffles, I have a design around for a one piece baffle that want to print with PETG, give that material a try, way stronger than PLA

 

[MikeVV]

I have an Ataman BP 17. The silencer canister is just a hollow tube. While it wasn't too loud, I figured to try to quiet it down some anyway,.

My first two or three attempts didn't work well. Hell, one even made the shot crack...louder..!

I made up a three segment chamber ,made of RC car spur gears. The diameter of the gears fit the I.D. of the can almost perfectly. The three gears sit on three pieces of all-thread, the front one is mounted solidly. The center one is able to move, the rearmost is also solidly mounted. The one that moves, is held in place buy two sets of springs (ball point pen). One long set to extend the gear location, or, enlarge that chamber during the air flow, a short set to old the gear in position under nonfire conditions.

It actually works really well. Made a noticeable difference in my indoor range.

I've got pictures somewhere, but not obvious to me right now...

Mike

 

[Odoyle]

I have an Ataman BP 17. The silencer canister is just a hollow tube. While it wasn't too loud, I figured to try to quiet it down some anyway,.

My first two or three attempts didn't work well. Hell, one even made the shot crack...louder..!

I made up a three segment chamber ,made of RC car spur gears. The diameter of the gears fit the I.D. of the can almost perfectly. The three gears sit on three pieces of all-thread, the front one is mounted solidly. The center one is able to move, the rearmost is also solidly mounted. The one that moves, is held in place buy two sets of springs (ball point pen). One long set to extend the gear location, or, enlarge that chamber during the air flow, a short set to old the gear in position under nonfire conditions.

It actually works really well. Made a noticeable difference in my indoor range.

I've got pictures somewhere, but not obvious to me right now...

Mike

Hey Mike 

Appreciate it if you can find and post the pics of the Ataman BP17 Hollow LDC fillers.

Already tried running hair curler wrapped with oiled scotch brite and felt then tried Just a small diameter spring wrapped with them and want to see if there was a quieter option. The add on additional LDC added to it makes it kinda long.

 

[dan_house]

discussion of “internals” is often a no-no on many forums for legal reasons.

http://www.silencertalk.com/

is a forum run by folks who make these devices, and they have an airgun section. And.... reading abou tthe non-airgun device is not only interesting but educational for AG effrots too