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Printed Silencers

Discussion in 'Anything Airgun Related' started by StephanT, Oct 23, 2018.

  1. Drumdrumman

    Drumdrumman Engaging Member

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    StephenT I carnt agree more..I'm looking at a D.I.Y One for my Springer. I was thinking about using felt washers off drumkit cymbal stands for the baffles.. ??
     
  2. StephanT

    StephanT Active Member

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    BTW, didn't have any comments on whether the setup below constitutes enough of a unassembled "kit" - before I start shipping some of these around I want to make sure I'm not on the wrong side of the law...

    [​IMG]
     
    James Howlin likes this.
  3. TR158

    TR158 Engaging Member

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    Happy to test one for you. I have a .177 Zbroia Kozak which is sub 12ft lbs.

    1/2 UNF fitting.

    The rifle currently has a shroud so I could test with and without the shroud.

    .
     
  4. StephanT

    StephanT Active Member

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    Roger that
     
  5. rkr

    rkr Post Whore

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    If you want tests at higher power levels I do have 100 fpe .224 and 150 fpe .257 airguns, both with 1/2" threads. For even more power I could test in my 270 fpe .45 but that one has 5/8" threads. I could measure the sound levels of those small bores against A&M Marksman if you want.
     
  6. QuoVadis69

    QuoVadis69 Donator

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    Just leaving an end cap lose means the recipient has to attach it which constitutes assembly - you're covered bud. :)
     
    James Howlin likes this.
  7. StephanT

    StephanT Active Member

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    :thumb: that was my thinking too... and the endcap alone on the rifle has zero net effect and the other part of the mod cannot be fitted to the rifle...
     
  8. TR158

    TR158 Engaging Member

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    Not sure if that was intended for me? If so, shall I PM you my address etc or are you still selecting candidates?

    .
     
  9. StephanT

    StephanT Active Member

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    it was just a general question - I'm in my own comparative tests at present... once I've narrowed them to one, two or possible three good candidates, I will start sending out some...
     
    TR158 likes this.
  10. TR158

    TR158 Engaging Member

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    Thanks Stephan. I think there might be some interest in general in these for us Zbroia enthusiasts, either to complement the existing setup with the shroud and also as a replacement for the shroud.

    .
     
  11. vizlauk

    vizlauk Engaging Member

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    Pm sent , maybe a challenge for you.
     
  12. jdk1

    jdk1 Engaging Member

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    Are there any plans for an overbarrel design ?
     
  13. StephanT

    StephanT Active Member

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    I've had a couple of questions for some... but for now the experiment is to get a good acceptable baffle/internal design that is effective but also suited to 3D printing - once we're there, we can shrink them a little and pass the expansion chamber to an over-barrel portion...
     
    jdk1 and TR158 like this.
  14. jdk1

    jdk1 Engaging Member

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    Thanks for that :up:
     
  15. robs5230

    robs5230 Pro Poster

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    Hi Stephan. WHat sort of length and OD will these be ?
    Are you planning to make any calibre specific ones ? The biggest fault in off the shelf silencers is that they accommodate up to (normally) .22. This means the silencer is then less efficient for .177 as baffle and exit holes are too big.
    I have a need for a short (no longer than 120mm overall) moderator. Happy with an OD up to but no greater than 38mm and interested to try one if you have anything suitable. Rob
     
  16. StephanT

    StephanT Active Member

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    hi Rob

    I'm assuming your .177 is sub 12fpe?

    All possible... currently it is all about experimenting.. and seeing whether there is anything we can do that is useful (or more useful) than what is commercially available. for now those that you saw assigned for the testing over the weekend (weather permitting), are all 140mm in total length and have a 32mm OD - just historically I've found 32 to be good for .22 and less (at least for the lower FAC 22 Energies) - ultimately, energy equates to required volume (well roughly as it is volume of air expelled).

    currently I'm running a 6.8mm hole to cater for the .22 but my feeling is we can get that down to... but if you want a .177 specific that can most certainly be done...

    Does anyone have an opinion on what the whole size should be for .177? Im thinking 5.5mm but that's just me... Any opinions appreciated!
     
    James Howlin likes this.
  17. robs5230

    robs5230 Pro Poster

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    Hi
    I shoot sub 12, predominantly .177 but also .22
    5.5 would seem good for .177 and the reduction from the 6.8mm should make a significant difference to the sound output.
    As .177 is a less efficient calibre (needs more air and hence makes more noise) it would make sense to do all you can to get it right for .177.
     
  18. StephanT

    StephanT Active Member

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    what I'll do is see which configuration (of those that I'm testing over the weekend) will give me the best results - then I'll try one of the same length with just the hole diameter decreased to 5.5 and see if that gives us a noticeable difference...
     
  19. robs5230

    robs5230 Pro Poster

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    I'd be very interested in the outcome.
    32mm OD works for me. Another 20mm off the OA length would be even better

    The hole diameter reduction will need to be through all baffles too to have maximum effect
     
  20. Adrian1

    Adrian1 Member

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    They look fantastic and I hope one day to try one on my AA510 XS it has variable power from 5 lbs to 30lb I have a Q AIRARMS QTEC MOD on at present and thats pretty quiet. Cheers Adrian
     

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