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Thread: Airshaft spring mission

  1. #1
    Junior Member
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    Default Airshaft spring mission

    Hello

    I got 3 different gbb's with escort system. But only in one of them is airshaft spring - sun project XM.

    What kind of task it is performing?

    From my point of view - spring provides a better seal of o-ring (at front of airshaft)
    But then: why the MP5 does not have a spring initially?

    Ivan B
    Sun Project M733 full custom, Escort MP5 custom, Daytonagun M249 GBB, Daytonagun mk43

  2. #2

    Default Re: Airshaft spring mission

    The Shoei MG42 also has something like this. A 2-part airshaft (the airshaft itself and the nozzle). This spring has a bad habit of breaking, and experimenting with different length/strength of springs, I have found (as have Jugoman) that stronger spring = more fps, weaker = less fps (but according to Jugoman, more reliable loading).

    And are there any advantages to this 2-part airshaft compared to a normal design like on the MP5?

  3. #3
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    Default Re: Airshaft spring mission

    Hmm...

    Thank you - this is very interesting! Can you make a photo of this 2part airshaft?


    Maybe I will be make some experiments with spring on a M249 kit.
    (Now kit can shoot about 115m/s with 0.25BB (120psi HPA))
    Sun Project M733 full custom, Escort MP5 custom, Daytonagun M249 GBB, Daytonagun mk43

  4. #4

    Default Re: Airshaft spring mission

    What kind of task it is performing?
    Yes, keeping the airshaft forward and sealed to the chamber is the intent.
    Wolv
    Whiskey Company
    ---------------------
    -…the stupid hit me so hard … I blacked out for a second.
    ---------------------
    You receive what you give. 'Disconnected', In Flames

    http://www.lonestarairsoft.com
    http://www.texasairsoft.org

  5. #5

    Default Re: Airshaft spring mission

    But on the Shoei, the spring pushes the nozzle-part of the airshaft backwards...

    My camera is sortof broken, so it's hart to get good detailed pics of small things like this.

  6. #6
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    Default Re: Airshaft spring mission

    Quote Originally Posted by Panzergraf
    ...the spring pushes the nozzle-part of the airshaft backwards...
    Close to this pic?


    Quote Originally Posted by AustinWolv
    Yes...
    Austin, why some escort systems guns does not have spring initialy?
    Sun Project M733 full custom, Escort MP5 custom, Daytonagun M249 GBB, Daytonagun mk43

  7. #7

    Default Re: Airshaft spring mission

    Don't know and honestly haven't sat down to think about the differences.
    Wolv
    Whiskey Company
    ---------------------
    -…the stupid hit me so hard … I blacked out for a second.
    ---------------------
    You receive what you give. 'Disconnected', In Flames

    http://www.lonestarairsoft.com
    http://www.texasairsoft.org

  8. #8
    Senior Member mateba's Avatar
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    Default Re: Airshaft spring mission

    What are the demensions of the spring? What are the affects or varying tensions? I'm now looking for one too and would appreciate and solutions.

  9. #9

    Default Re: Airshaft spring mission

    I got some useful shots of the Shoei internals:
    http://img39.imageshack.us/img39/8536/mginternals1.jpg
    http://img17.imageshack.us/img17/6712/mginternals2.jpg
    http://img188.imageshack.us/img188/7644 ... rnals3.jpg
    On a related note; why the 2-part airshaft design?
    I can't figure out what the advantage to that would be.

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