LG110 accuracy

Discussion in 'Steyr' started by Rich3344, Sep 6, 2017.

  1. sstyle

    sstyle Member

    Joined:
    Dec 20, 2016
    Messages:
    327
    Location:
    Moscow, Russia
    Ok, I disassemble my Steyr again.

    I found that the hammer has an old scratch from the bearings. I have to replace it? Here is a video:


    and detailed photo:
    20180515_173415 (1).jpg

    Also I found that transfer port has a backslash. Is it normal?


    I found very interesting thing about STARLOCK disc. It will affect catch rod if I forced it down to the end, so looks like I have to leave a free space under this disc, right?
    starlock.jpg

    After assembly I got:
    Min: 241.8
    Max: 245.4
    Standard deviation: 0.75

    Very bad.

    Then I thought about weight of pellets and took out my scale. Sorted 30 pellets +-0.003 gramm and repeated. Results much better:
    Min: 243.2
    Max: 245.1
    St. dev: 0.42
    Снимок экрана 2018-05-15 в 20.43.19.png
     
    Last edited: May 15, 2018
  2. RobF

    RobF Administrator Staff Member

    Joined:
    Mar 4, 2010
    Messages:
    12,027
    Location:
    Poole, Dorset
    Club:
    Parkstone Gun Club, South Dorset FTC, Southampton Buccaneers
    Looks better
     
  3. Red Hunter

    Red Hunter New Member

    Joined:
    Apr 23, 2011
    Messages:
    24
    Location:
    Carlisle, Cumbria, England
    Club:
    Cumberland News Rifle Club
    The transfer port is meant to be on a slight angle - it does not go in at 90 degrees to the action
     
  4. hmangphilly

    hmangphilly Not quite a full phil

    Joined:
    Nov 5, 2013
    Messages:
    2,041
    Location:
    wimborne
    IMG_3066.JPG Sear was dragging
     
    Last edited: May 16, 2018
  5. sstyle

    sstyle Member

    Joined:
    Dec 20, 2016
    Messages:
    327
    Location:
    Moscow, Russia
    Is it ok?
     
  6. RobF

    RobF Administrator Staff Member

    Joined:
    Mar 4, 2010
    Messages:
    12,027
    Location:
    Poole, Dorset
    Club:
    Parkstone Gun Club, South Dorset FTC, Southampton Buccaneers
    Probably the best way to know is to get a new one and compare. Unfortunately mine is in my gun and my spare isn't new.
     
  7. dutoitk

    dutoitk Member

    Joined:
    May 6, 2010
    Messages:
    131
    Location:
    Cape Town South Africa
    Here is a new unused valve spring
    Don't know the properties of spring steel, but can't think that 0.4 mm diff for a spring that has been under tension for months is anything to worry about.
     

    Attached Files:

    sstyle likes this.
  8. sstyle

    sstyle Member

    Joined:
    Dec 20, 2016
    Messages:
    327
    Location:
    Moscow, Russia
    Got a digital gauge and adapter. Very strange thing. Value constantly changing. I think there are only two possible reasons: 1) air leaks somewhere 2) gauge not stable. But it is 0.1% accuracy class.

     
  9. RobF

    RobF Administrator Staff Member

    Joined:
    Mar 4, 2010
    Messages:
    12,027
    Location:
    Poole, Dorset
    Club:
    Parkstone Gun Club, South Dorset FTC, Southampton Buccaneers
    Yes that doesn’t look good.
     
  10. Total SS

    Total SS Member

    Joined:
    Aug 7, 2015
    Messages:
    87
    Location:
    South Africa
    WOW never seen that.

    even so that pressure is high. do you have the old version of the tester body. if so then you can put it into a bowl of water to see where the leak is coming from.
    even so if the leak was causing that I am sure that you would hear the air as it is a quick change and not a slow leak. there could be a couple of places if it is leaking.
    maybe try some diluted soapy water and a brush and brush it on, the soap will foam where the leak is. if there is no leak then the gauge might just be faulty.
     
  11. sstyle

    sstyle Member

    Joined:
    Dec 20, 2016
    Messages:
    327
    Location:
    Moscow, Russia
    yeah, I will try with water today. My old reg set to ~80bar, looks like new one to ~100bar.

    I wish to test directly cylinder -> gauge. But I need some adapters for this. Reg is always open if pressure is 30bar (for example) and can not affect, right?
     
    Last edited: May 25, 2018
  12. Evo

    Evo Bob Evans,, always getting banned from sales

    Joined:
    Dec 9, 2015
    Messages:
    585
    Location:
    wirral uk
    Club:
    ByleyFTC
    a little tip, if looking for leaks use a plumbers leak detector spray, its only cheap but will spot the smallest if leaks
     
    sstyle likes this.
  13. sstyle

    sstyle Member

    Joined:
    Dec 20, 2016
    Messages:
    327
    Location:
    Moscow, Russia
    I put the whole system under water - no leaks. And drop the pressure to 30bar. But it constantly changing 27.7-28.2bar. Looks like gauge has an issue.



    I will talk with manufacturer.
     
  14. RobF

    RobF Administrator Staff Member

    Joined:
    Mar 4, 2010
    Messages:
    12,027
    Location:
    Poole, Dorset
    Club:
    Parkstone Gun Club, South Dorset FTC, Southampton Buccaneers
    All the gun and gauge under water???
     
  15. Conor

    Conor Never been banned from sales Staff Member

    Joined:
    May 4, 2009
    Messages:
    3,081
    Location:
    Ardboe, Co.Tyrone.
    Club:
    Back Hill Ballistics; DFTC; Nelson FTC
    There lies the problem!
     
    hmangphilly likes this.
  16. hmangphilly

    hmangphilly Not quite a full phil

    Joined:
    Nov 5, 2013
    Messages:
    2,041
    Location:
    wimborne
    No way Chris will have set that regulator to 97 bar and I know for a fact that he is using quality equipment .

    I'm afraid it might be back to square one now that you have adjusted that regulator before checking the test equipment it's almost certain to creep now

    It would be interesting to see what that gauge reads at zero pressure or atmospheric I think all of ours read zero which is strange really because you would think that they should read one bar
     
    Last edited: May 26, 2018
  17. hmangphilly

    hmangphilly Not quite a full phil

    Joined:
    Nov 5, 2013
    Messages:
    2,041
    Location:
    wimborne
    No he can't have
    He wouldn't have
    He couldn't have

    But if you did I'd like to see the video of that
     
  18. blacklab

    blacklab Member

    Joined:
    Aug 12, 2012
    Messages:
    584
    Location:
    pontypridd
    Club:
    nelson
    is it not enough pressure to seal the reg off, just guessing
     
  19. frank

    frank Active Member

    Joined:
    Oct 7, 2014
    Messages:
    177
    Location:
    lincoln
    Club:
    lincs hft
    Pressure gauges are calibrated at normal atmospheric pressure as zero because one bar external pressure and one bar internal pressure in effect cancel each other out, so the gauge measures the increase above normal atmospheric pressure
     
    sstyle likes this.
  20. sstyle

    sstyle Member

    Joined:
    Dec 20, 2016
    Messages:
    327
    Location:
    Moscow, Russia
    Looks like the gauge has an 1.2-1.5% accuracy.

    Also I tested my both regs. Original one set to ~80bar and drop to 78.4bar when fire.



    Reg that was blueprinted set to 99-100bar and drop to 84bar when fire.



    I will send the gauge to the manufacturer for better accuracy and repeat the test.
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice