LDC cores

Home Forums General Mods/Machinists LDC cores

Viewing 15 posts - 1 through 15 (of 18 total)
  • Author
    Posts
  • #254
    blodnob
    Participant

    Just a couple of pics of some shrouds and cores ive been messin with.

    This one just screws to the muzzel and the tube sits on it supported at the back as per above on another bush. The bushes are vented into the gun frame to use the extra volume.

    Hope you like.
    Sean.

    #23762
    shadoh
    Participant

    Very nice. I like this allot better than the one you posted before with the random hole pattern ).

    #23788
    kamikaze
    Participant

    Sean,
    great work as always. can you post some pics with it installed? and have you measured the db reduction at all?

    #23801
    walkonking
    Participant

    What a great picture. The lathe work is impressive.

    When installed does it quiet down the gun a lot? How about weight? I know some guys are using delrin for a similar setup.

    With you valves and you LDC you have one quiet powerful airrifle.

    🙂

    #23874
    mcmike
    Participant

    Blodnob,

    I recall that it was some of your old designs that inspired me in the first place. So Thanks!

    Here’s my frame-extender & LDC for standard Talon.

    Airstripper-cone version. Made the cones from plastic and I am quite happy with the performance. Used only 3 cones after some testing. Spring holder’s has also cones inside them.

    Here’s another internals. Vortex-chamber. Works also quite well. Difficult to tell the difference with this and airstrippers.
    [/url]

    #23897
    blodnob
    Participant

    I’m not sure exactly how id measure the decibells. I dont shave a gun myself or do any shooying but when i fit them to the chaps guns i generally get a gob open stare followed by a few four letter expletives.
    The noise tends to be a drawn out hiss, rather than a dull thud of the standard items.
    I wish i could use the CAD you use.Or any CAD for that matter. I suppose it would make life a lot easier. Make the mistakes on paper first sort of thing.
    I,m working on a bit of a gun of my own design at the minute, but cant get my head around how a piston and one way valve that needs to be incorporated fits into the firing stroke. Im trying to get it to operate at upto 4 or 5 hundred barr.
    I may put pics of it up and see if anyone can help out.
    Ive got the valve, breach and hammer tube done so far.
    Any way it’s past my bed time so i’m off.
    Sean.

    #23899
    rabbits
    Participant

    as always my friend great work .. 😀

    #23900
    y
    Participant

    I saw a digital sound meter for $20 in Wal-mart a few weeks ago. Was for measuring car stereo systems…. Not sure how good it is for only $20 though.

    #23901
    shadoh
    Participant

    If you can find the old analog cheapo that Radio Shack used to sell its not a bad meter. The cheapo digital ones usually dont have a fast enough response time for something like this.

    #23902
    y
    Participant

    Radioshack is dropping most of their actual Radio and electronic hobby type stuff… have a hard time finding components in the one near me now…. plus their sales staff are useless on electronic stuff, and not that good with the crap they try to sell now…… “wanna buy batteries/cellphone” seems to be all the training that get or experience they are expected to have.

    Might be able to get the analog on eBay…

    #23905
    shadoh
    Participant

    LOL, you made me remember an argument I had with one of their trained sales staff not long ago.

    We were out of RCA Y splitters at the shop and I needed some asap for a job. I figured the crap Radio Shack had was better than nothing as my customer had to leave on a road trip.

    I walk into the store and immediately get the “can I help you” BS that you get these days. I ask him where the RCA cables are, specifically the Y cables. He then asks what Im using them for blah blah blah. I say that I know what I need if you could just show me where you keep the RCA cables. He tells me it makes a difference because he needed to know which end the source audio connector was, male or female. I said that no, it doesnt matter but if you must know I need to buy two, single female to double male Y connectors.

    Here it comes

    He tells me “yes it does matter as you can only feed audio through the connector one way”. I say “what are you talking about?” He then tells me that RCA Y connectors have one input and two outputs and that you have to make sure you get them with the right ends on them or they wont work. I tell him, you know that Y connectors are just splitters right? That all the positives are tied together and all the negatives are tied together and it doesnt matter which way the audio travels through the splitter, its not directional. He tells me Im wrong and that if I try to hook them up backwards they wont work. Whatever, just please show me where you keep them on the shelves or I can find them myself. He just looked at me like I was an idiot and walked me over to the right section of pegboard.

    The guys at the shop had a good laugh when I got back and I had told them what had happened.

    Anyway. I think I have one of those old Radio Shack meters around here somewhere. Maybe I will pull the LDCs out of my SS and take some measurements. Hmm, I will have to figure a way to block the holes in my bushing. I guess a washer would work as a temporary plug.

    #23911
    kamikaze
    Participant

    mcmike,
    Is the spring’s purpose to provide tension to the stack of cones so they won’t rattle around in the extension?
    Great work with the CAD and the actual product!

    #23914
    skybones
    Participant

    I would like to have one on my Condor,small enough to look like a “bull” barrel coming out of the frame cap. Is that possible? Thanks, tz

    #23917
    mcmike
    Participant
    quote kamikaze:

    mcmike,
    Is the spring’s purpose to provide tension to the stack of cones so they won’t rattle around in the extension?
    Great work with the CAD and the actual product!

    Spring has two purposes. First is to form a primary expansion chamber. I have sound absorbing material around the spring to kill some of high frequency noice. Secondly it is also providing axial tolerance (+/- 15 mm). I designed that silencer before I got the gun and didn’t have exact dimensions for how much barrel will extend from frame. And yes it will keep the cones stacked tightly.

    #23918
    shadoh
    Participant

    Edit:

    Moved to a new thread so I dont derail this one.

Viewing 15 posts - 1 through 15 (of 18 total)
  • You must be logged in to reply to this topic.