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Original 50 Frustration Day Opinion Please

Discussion in 'Technical' started by Deejayuu, Oct 17, 2020 at 9:22 PM.

  1. Deejayuu

    Deejayuu Donator

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    Thanks for looking.
    Lovely thing in 5.5 mm calibre. Working order but failed compression check and some spring noise and loading tap severely tight. Opened up and as suspected very dry with any lube coagulated. Spring intact with slight buckle and some uneven gaps between coils when compressed. Spit'n'polish, soften leather washer, lubricate and reassemble. Passes comp. test easy.
    Disappointing 7+ with Exact 13.5 gn, 8+ with Jumbo 16 gn which surprised me.
    Try new spring very similar spec. Diesel, high, initially with 16 gn and 8ish with Exact.
    Less spring drops energy but more balanced toward light pellet
    Slamming?? Bore 28 x stroke 80 so should make energy OK.
    Very irritating.
     
  2. cloverleaf

    cloverleaf Super Moderator Staff Member Mod/Admin

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    Could be a port length / lost volume issue a'la the later Airsporters? IIRC these never were "full power" guns..
     
    hmangphilly and Deejayuu like this.
  3. Deejayuu

    Deejayuu Donator

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    Sounds very likely. :up:
     
    cloverleaf likes this.
  4. Brimfire

    Brimfire Stirred, not shaken.

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    @Deejayuu, after fitting a synthetic piston washer to my example I've got nearer 6ft/lbs so count your blessings.

    I overcame my disappointment by readjusting my expectations of this gun. It seems that these things were never as powerful as their size, weight, quality and reputation may suggest so I now regard it as Decorative rather than Functional and I like it a lot more because of that.

    They're beautiful and elegant guns and firmly in the Collectible Class so I doubt few (if any) have them as their only gun or for Hunting. As such, it's allowed to be less than efficient or ruthlessly practical - I'd say get it shooting sweetly and enjoy it as a good looking, high quality, short range garden gun.
     
    Deejayuu likes this.
  5. ajohn

    ajohn Busy Member

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    The higher weight being better could suggests restricted air flow rates to the pellet.
     
    Last edited: Oct 18, 2020 at 10:31 AM
  6. hmangphilly

    hmangphilly Keyboard Hero

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    Tap loaders are a mechanical nightmare
     
    Deejayuu likes this.
  7. Deejayuu

    Deejayuu Donator

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    Not ours. We have one in 4.5 mm performing better :)

    Interesting. I thought the opposite so will have a read.

    Our Webley Mk3 10+ :thumb:
     
    hmangphilly likes this.
  8. ajohn

    ajohn Busy Member

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    As I am interested in Diana's I had a look. Seems 10ft lbs could be expected and more like 12 later in the 80's - it seems. A gunstartrader review though. Too big and heavy to interest me.
    Mention of tap loaders always reminds me of the HW57. Symptom - pellets flying way off course every now and again as it didn't always align correctly. Suppose they could leak and older guns seem to rely on fit for air tightness. Some pfpe grease might help. It wont detonate. That for bike chains maybe as it tends to be rather expensive in other forms.
     
  9. hmangphilly

    hmangphilly Keyboard Hero

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    Yeah .
    they don't make 'em like that any more though . Even those don't compare to current systems .

    Think of all the things that have to come together ..

    stacks of lost volume
    sealing of tap to cylinder
    sealing of tap to barrel
    Fit of pellet in loading tap
    indexing tap to barrel
    lateral alignment of tp to barrel
    mechanical transfer of pellet from tap to barrel

    night mare
     
  10. ajohn

    ajohn Busy Member

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    ;) You can buy a relatively inexpensive bore scope of amazon that will go up a 177. Not brilliant but sort of ok. Bought to see if I can do anything with the HW57 - when I can find it.

    Proved useful to check an airsporter - I could see hand filing marks on the rifling from when the tap was fitted. Suspect that is what they are anyway.

    Not looked at the Mk3 but webley seem to taper the tap so air flow may complete loading. BSA more of a conventional pellet loading.
     

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