Walther look see

Discussion in 'Piston & Spring' started by hmangphilly, Mar 27, 2018.

  1. hmangphilly

    hmangphilly Not quite a full phil

    Joined:
    Nov 5, 2013
    Messages:
    2,005
    Location:
    wimborne
    Interesting
    First time I've seen one of these .

    It's gonna be a journey.
    Hop on the bus .
    It's free .....

    IMG_2804.JPG

    The gadget in the foreground might be new to you but will give a clue why we are going inside this gun .

    image.jpg
    Nice and simple

    Don't you hate it when people nick your ideas before you've even had them

    IMG_2805.JPG


    Not sure I'm happy about this burr
    IMG_2807.JPG IMG_2808.JPG

    Well it had to come out

    image.jpg

    Oooh look
    Special stuff
    image.jpg

    Quite a lot of grease
    image.jpg

    Let's see
    What it takes to get this fella moving

    IMG_2812.JPG

    Remember this

    image.jpg
     
    Last edited: Mar 27, 2018
    MickyFinn and castle like this.
  2. tillygti6

    tillygti6 Tilly's gun stocks

    Joined:
    Jul 30, 2011
    Messages:
    496
    Location:
    herne bay
    this will interest you Phil, see what happens if the front fixings arnt evenly torqued up...
    I've not tried it with the lgu but the lgv the couple I've had here don't like it unless they are even (ish)
    easier said than done in wood...
     
  3. hmangphilly

    hmangphilly Not quite a full phil

    Joined:
    Nov 5, 2013
    Messages:
    2,005
    Location:
    wimborne
    Thanks Tommy
    Remind me when we get to the wooden part .

    I think that might be some way off


    230 g not working

    image.jpg

    Nope image.jpg


    Nope
    image.jpg



    It's a 6 tinner

    image.jpg





    A bit on the snug side for me


    Off to the kitchen to warm thing up ............this gun had temp issues ...................

    gotta say this looks familiar ..............

    any way we'll see ..............
     
    Last edited: Mar 27, 2018
  4. Nick G

    Nick G Active Member

    Joined:
    Nov 21, 2012
    Messages:
    350
    Location:
    coventry
    Club:
    Greyhound/ Purley Chase
    looks like one of the lost volume jobs to me , I am sure someone will be on soon to confirm, a lot of brass floating about , Temp issues ? cant be one of those then .
    I am about to begin a new lgu tune as I have a spare comp tube , I may try the trick with the pellets .

    Are you going o ring Phil, or labyrinth ? i fancy having a go at a labirynth, i think there should be enough volume at 22mm diameter, and with a long piston nose room for plenty of grooves .
     
    Last edited: Mar 27, 2018
    Gary Martin likes this.
  5. RobF

    RobF Administrator Staff Member

    Joined:
    Mar 4, 2010
    Messages:
    11,977
    Location:
    Poole, Dorset
    Club:
    Parkstone Gun Club, South Dorset FTC, Southampton Buccaneers
    Before you size it (is it too late?) cool it in fridge and see what happens. My theory is it will be less than a 6 tinner.
     
  6. hmangphilly

    hmangphilly Not quite a full phil

    Joined:
    Nov 5, 2013
    Messages:
    2,005
    Location:
    wimborne
    It's going in the kettle in a minute .
    Wonder if I've got enough pellets
     
  7. Nick G

    Nick G Active Member

    Joined:
    Nov 21, 2012
    Messages:
    350
    Location:
    coventry
    Club:
    Greyhound/ Purley Chase
    Whats it like without the seal , looks like its picking up to me , hence all the brass swarf.
     
  8. hmangphilly

    hmangphilly Not quite a full phil

    Joined:
    Nov 5, 2013
    Messages:
    2,005
    Location:
    wimborne
    Yep think you're right Nick .
    No brass on this . must be my crappy pics .

    I was just thinking of sizing this , but when you see the next lot of pics you'll see why I've changed my mind .

    I 'm not happy with sleeving the OE tube at the moment unless i can figure a way of taking the end cap off to fit one of my own which ,you know, holds and seals the sleeve .
    Don't want to glue the sleeve in an OE tube . I wouldn't trust it to seal .

    That said it'll probably be the same amount of work to just make a new tube . So that's my instinct right now ..........any way ,it'll be good practise for our full rifle project that has found a back burner for the moment ...........

    Piston wise ?
    Well. Full skirted .........to keep it nice and straight

    Will that limit me on spring OD ? sure a bit , but the spring in this tune is around 20 .5 mm OD so it gonna be snug but ok .......don't know what the spring is but it's got preload washers that i would like to do away with ........dunno .....jury is out on the spring ...

    I got some Ti tube that ive already turned down to 0.4 mm wall so far and it feels plenty strong enough . So there's my piston body .

    Head ? ............probably keep to a nice fitting single o ring on a very shallow ( like me ) Ti head with a backing ring /bearing . I'm keen on the use of Ti for this for it's thermal properties and keep the weight down .

    I'll put pics up as i go just in case any one's interested ,and to show the owner just what we've been up to ..............should be interesting ( to me at least )
     
  9. hmangphilly

    hmangphilly Not quite a full phil

    Joined:
    Nov 5, 2013
    Messages:
    2,005
    Location:
    wimborne
    yeah the body is scuffing a little bit inside the tube .........
    not to worry .
     
  10. hmangphilly

    hmangphilly Not quite a full phil

    Joined:
    Nov 5, 2013
    Messages:
    2,005
    Location:
    wimborne
    So ............

    the first lot of pics were done earlier in the 'shed of love ' I didn't take the temp but guessing 15 ish degrees

    then we came inside and put the kettle on .............

    IMG_2813.JPG IMG_2815.JPG

    couldn't get the piston seal inside the comp tube so had to let it cool a bit ................she got tight.........


    IMG_2817.JPG IMG_2818.JPG IMG_2819.JPG


    It's been in the freezer for 20 mins under my peas .
    we know there are temp issues but just for Rob we'll do the cold test too.............

    IMG_2821.JPG
    IMG_2822.JPG

    just started to creep down


    IMG_2823.JPG
    IMG_2824.JPG



    So here we may have the problem .

    won't be machining tomorrow :( got to do a thing .
     
    Last edited: Mar 27, 2018
    Sundance likes this.
  11. RobF

    RobF Administrator Staff Member

    Joined:
    Mar 4, 2010
    Messages:
    11,977
    Location:
    Poole, Dorset
    Club:
    Parkstone Gun Club, South Dorset FTC, Southampton Buccaneers
    Like Portugal all over again. That was an AA seal and I seem to remember that went to 8 tins in the warm and 2 in the cold.

    So it’s not the seal flexing more it’s actually expanding then. It hadn’t dawned on me last time because I assumed the lip was thin enough to flex but that looks thicker.
     
  12. hmangphilly

    hmangphilly Not quite a full phil

    Joined:
    Nov 5, 2013
    Messages:
    2,005
    Location:
    wimborne
    Yep Portugal all over mate .

    Sorry

    A lesson hard learned .
    Still at least Panda's eyes cheered us up .:eek:

    If i remember , that was one of these red Aussie seals that was sized to work fine here , but got very distressed over there .
     
    Last edited: Mar 28, 2018
  13. RobF

    RobF Administrator Staff Member

    Joined:
    Mar 4, 2010
    Messages:
    11,977
    Location:
    Poole, Dorset
    Club:
    Parkstone Gun Club, South Dorset FTC, Southampton Buccaneers
    I thought it was AA.

    I can't remember. I had to put it away and not look at it for a long time.

    Will see about this o-ring thing and see if it's where I left it last time.
     
  14. hmangphilly

    hmangphilly Not quite a full phil

    Joined:
    Nov 5, 2013
    Messages:
    2,005
    Location:
    wimborne
    Minimal
    Nice and loose
    And temp tolerant stuff all around it

    That's where I wanna go


    Sure ,you talking about checking out the tune you shot at the Paul James shoot ?
    How many shots has it done now ? Not even a tin i reckon .....

    I'm expecting that to loosen up a bit , didn't we think it was a bit firm ?
    I wouldn't mind measuring the stroke on that at some point .
    Got a plan to make some extra spring room in a std tx but still quite short of safe elastic limit .
    Thats why the thin wall tube will help if it allows us to use a wider spring
     
    Last edited: Mar 28, 2018
    johnnyboy and RobF like this.
  15. johnnyboy

    johnnyboy Active Member

    Joined:
    Jan 26, 2014
    Messages:
    404
    Location:
    Newcastle upon Tyne
    Club:
    Redfearns... Thanks Guy's
    What a nice surprise this is .....have spent the last 3 weeks trying to get hold of either a TX or LGU to have a bit play and looks like now don't need too I've just become an observer.....well done Phil now this will be an interesting journey.

    Regards

    John
     
  16. RobF

    RobF Administrator Staff Member

    Joined:
    Mar 4, 2010
    Messages:
    11,977
    Location:
    Poole, Dorset
    Club:
    Parkstone Gun Club, South Dorset FTC, Southampton Buccaneers
    Yeh that one. Probably hasn't done a tin... will have to sort that out. Can sense an arm aching session ahead.
     
  17. Sundance

    Sundance Bush Cavity

    Joined:
    Mar 10, 2013
    Messages:
    285
    Location:
    swansea
    Great stuff Phil, no doubt now about the temperature issues...

    Can't wait to see what you come up with..
     
  18. hmangphilly

    hmangphilly Not quite a full phil

    Joined:
    Nov 5, 2013
    Messages:
    2,005
    Location:
    wimborne
    Yeah it's going to be fun Simon .
    Something to get our teeth into .

    Plenty of lathe work .....hooray !

    A few sums ........ boooo!

    Lots of pics .....,,,,hooray again !!!

    Rob can do the sums and everyone's happy :)
     
  19. Nick G

    Nick G Active Member

    Joined:
    Nov 21, 2012
    Messages:
    350
    Location:
    coventry
    Club:
    Greyhound/ Purley Chase
    O rings for me , as you know , x rings even better (less crush necessary) but not a very large selection of sizes to choose from , I have them in my own 21mm tune , one year of constant use and no issues .
     
  20. hmangphilly

    hmangphilly Not quite a full phil

    Joined:
    Nov 5, 2013
    Messages:
    2,005
    Location:
    wimborne
    IMG_2826.JPG image.jpg Ok ......

    a bit more measuring to do ..................I'm going for 173.............it don't matter that much just want a starting point IMG_2830.JPG

    IMG_2831.JPG IMG_2832.JPG

    Oh yes there's a top hat too i'll weigh that .

    IMG_2833.JPG

    IMG_2834.JPG
    IMG_2835.JPG
     
    Last edited: Mar 29, 2018

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