Lightweight Tx

Discussion in 'Piston & Spring' started by Nick G, Aug 25, 2017.

  1. Nick G

    Nick G Active Member

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    Got the stock back from the powder coaters today so its all in one piece ,The rig weighs 12 lb all up , the T50 is only on it to get it shooting, will use a big Nikko once its sorted .
    Shot it more extensively at the weekend ( beech stock 12 mag scope ) and it looks very promising , a mate at the greyhound shot it while I was shooting the course and managed a very small group at 55 yds off the knee so we shall see.

    https://goo.gl/photos/1zcXdNAjzQa9twgMA
     
    Last edited: Aug 30, 2017
  2. Gary Martin

    Gary Martin sultans of spring

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    fantastic

    looks fantastic Nick, very interesting.
     
  3. blackscale

    blackscale Member

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    Blimey! Very clever and looks tidy as well! :D:cool:
     
  4. cloverleaf

    cloverleaf Active Member

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    Thanks - might have to get a few of these seals, for yet another project that'll probably never happen.

    I get where you're coming from with the shot cycle - I believe Jamie has some accelerometer traces from this rifle that were taken from Mick's last springer bash; I'll be interested to see them when he gets round to posting them!
     
  5. Nick G

    Nick G Active Member

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    Yes Jamie , tested this one and my latest 21mm with short port , awaiting the results with bated breath.
     
  6. panaman

    panaman New Member

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    Amazing project. Did you used 7075 ergal or similar Aluminum alloy.
     
  7. scruff

    scruff Active Member

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    very good nick.....and that's praise indeed considering all the stick I give you about springers....wish I had your skills.
     
  8. Nick G

    Nick G Active Member

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    Who knows you might get the springer bug :rolleyes:
     
  9. Gary Martin

    Gary Martin sultans of spring

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    don't worry

    Nick, I cough all over him, soon he will be infected!
     
  10. Nick G

    Nick G Active Member

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    Will let him have a shot with this one who knows .
     
  11. Cooper_dan

    Cooper_dan Well-Known Member

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    What would the usual weight of an FT TX200 be? Is it the scope that adds all the weight?
    I've been told up to 18lb but was't sure if this was right or not
     
  12. Adam

    Adam Well-Known Member

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    I'm also firmly in the mass is good camp, especially for springers. The exception for this is shooting the sillies!
    :eek:
    Scope adds quite a bit depending on size and model but design and material of stock is the biggest thing. My LGU in a Warren Edwards laminate FT stock with a Nikko on top weighs 16 lbs. 97K in a Warren walnut FT stock with Bushnell 8-32x40 = 14.5 lbs. I don't know about TXes but would assume similar number to both above depending on stock and scope.

    So you're doing all this wonderful engineering to reduce the mass ... and then bolting a big Nikko to the top! :D You'd save almost 1 lb with a Bushnell instead and more with a Leupy comp ;)
     
  13. Nick G

    Nick G Active Member

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    A big Nikko is what I had spare
     
  14. Nick G

    Nick G Active Member

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    Here is the graph courtesy of Loki

    https://photos.app.goo.gl/u8cnWt7eM7dUzRoT2
    And here is my 25mm ally o ring piston as a comparison

    https://photos.app.goo.gl/RnrkhSI8d64vFFFn1
     
  15. skires

    skires Well-Known Member

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    Yes the Eclipse did have an alloy body. It was quite a huge thing. Way too big for 12fp and designed to shoot more like 18fp and probably aimed at an overseas market.

    Doesn't alloy expand at a greater rate than steel? So is there any concern Nick over changes in temp extremes? Or is the difference in expansion minimal in typical UK temps ( 0C to say 30C )?

    I suppose on most rigs the body is steel and then there's a lot of alloy going on with mounts, risers, scope bodies etc.

    Very impressed.

    How is the action fitted to the stock? I remember seeing photos of the lass that shoots FT in the Worlds etc and she has an alloy looking skeletal stock. Heli Jalakas?

    Interested to see how this performs.
     
    Last edited: Oct 8, 2017
  16. Nick G

    Nick G Active Member

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    The action fits using the same set up as in a standard Tx.
    I dont know about expansion as yet , but up to now its been ok , obviously the barrel is steel , but most of the rest is ally , comp tube is ally body with a steel liner ,and steel where the cocking link runs . After a couple of experiments getting the right set up in it ,( I was struggling to get the power low enough for the winter league Chrono ), so have gone for the original 22mm set up I had in and now running at 11 fpe with 8.4, so I have room to adjust if needs be,
    Its shooting very well far better than I am :mad:.
    Oh I looked into buying one of the ally stocks after seeing a picture heli , but decided on my making my own as the cnc ones are very heavy , mine is hollow so weighs very little .
     
  17. skires

    skires Well-Known Member

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    Many thanks for the info.

    You don't need to buy when you have your skills set ... and you get the extra pride of ownership of your own work.

    Good luck with it and let us know how it goes.
     
  18. Amac

    Amac Active Member

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    It will certainly be interesting to find out what your own thoughts are regarding the long term performance of the lightweight "Silver Bullet" Nick. An impressive feat!
    Andy
     
  19. Stix

    Stix Left Handed & Confused

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    Brilliant work Nick top craftsmanship at it's very best
     

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