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Taming the HW45

Discussion in 'Air Pistols' started by Tinbum, Apr 10, 2014.

  1. Tinbum

    Tinbum Delusions of adequacy

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    After completing all the orders before my 3pm post run, I found myself with a few spare hours to play!

    I love my HW45. Its big, clumsy, heavy and not particularly accurate, but there's something about using it that just makes me smile.:)

    I decided to see if I could improve the tuning kit I'd been working on. The main problem is the rear moving piston with a steel spring guide in the piston itself. This design actively encourages recoil, and the added mass of the spring guide adds to the woes. An age old answer to this has been to have the guide at the front (back) instead of in the piston. This is sort of ok, but not ideal and it saps power.

    I wanted to employ the same basic idea behind my rifle kits. Support the spring as much as possible while allowing it to do its thing. Today's breakthrough was a 50/50 spring guide, two identical guides half the length of the steel original and only a fraction of the weight. Add to that slip washers for the ends and the result is a very fast, and surprisingly quiet firing cycle with a greatly reduced recoil felt in the hand. I was pleased to see the power had risen from 4.5 to 5.6 fpe with hobbys, while dieseling has all but disappeared after lubing the insides with the merest hint of moly.

    I'm going to do some very extensive accuracy testing at the weekend with my step-dad on some cans we've been saving, but the difference on just my 6 yard range is noticeable!
     
  2. Ichabod Armacost

    Ichabod Armacost Donator

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    Sounds good to me! Surprised you haven't had more of a response though. Been thinking of getting a pistol, either Webley Alecto or an HW 45...............Let me know how you get on with your testing, if you want you can PM me. One thing I am curious about is that nobody seems to use PTFE grease / oil to lube their guns with, it is the slippiest stuff known to man after all. One can get machinable PTFE bar stock as well, which I would have thought would be slippier than Delrin?
     
  3. Meteor62

    Meteor62 Major Poster

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    Good to see an improvement on the hw45 I see nothing but glowing reports about them but personally I find them very jumpy suffer from spring noise, I hate the sloppy fit of the cocking link that rattles over the spring coils like old marleys chains.
     
  4. Prosport.22

    Prosport.22 Posting Addict

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    45 will make minced meat of synthetic guides, Steve Pope tried that route years ago (and gave up) its a hard shooting spring pistol,the design and tolerances for a powerful ratio of a rather large spring capacity, to energy output, encompassed steel components for a reason, durability.....
     
  5. Tinbum

    Tinbum Delusions of adequacy

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    Its now had almost 1,000 pellets through it. There's no marking or wear at all to the guides. Just cos Steve couldn't do it doesn't mean it can't be done.:)
     
  6. mattyts

    mattyts Donator

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    Have you got any chrono data from before and after fitting of your kits? Not any tuning or anything inbetween,just with your kit being fitted?
     
  7. Tinbum

    Tinbum Delusions of adequacy

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    Fraid not, I only had a combro until last week which is a tricksy b****r with pistols. Especially at 15 yards!:cool: One of the guys who bought a kit is doing tests. I'll post his findings when I get them.

    btw, I've reduced the spring and brought the power back to 4.5fpe. Its very nice to shoot at that power!
     
  8. mattyts

    mattyts Donator

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    I'm not surprised the combro is hard to use,you're trying to shoot through it at 15 yard :D
     
  9. Barcelona68

    Barcelona68 Banned

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    I've tamed my '45....


    It's called experience.;)
     
  10. Meteor62

    Meteor62 Major Poster

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    I sent my 45 for a venom tune back in the early 80's it came back firing just as it did before so I got rid of it. Venom did some nice engraving work on the 45's though or rather outsourced that work but very nice none the less
     
  11. Dag

    Dag Pro Poster

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    I have just bought a kit from Tinbum and will soon install it. Hopefully this weekend when I have put another couple of hundred pellets through it I will use the club chrono and get some pre installation data.
    As soon as the kit is installed I'll repeat the exercise and post the info here.
    I would do it at home but I'm not sure about my level of expertise at shooting through the Combro if indeed I could attach it to the HW45 let alone at 15yds!;)
    Dag
     
  12. Meteor62

    Meteor62 Major Poster

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    Is this really a tuning kit? As I understand it it's really a replacement for the metal parts that give out spring twang ? Tuning is more involved.
     
  13. Dag

    Dag Pro Poster

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    I think the only mention of tuning was Matty saying "Have you got any chrono data from before and after fitting of your kits? Not any tuning or anything inbetween,just with your kit being fitted?" I don't think anyone has suggested it is a tuning kit.
    dag
     
  14. Meteor62

    Meteor62 Major Poster

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    Maybe I read it wrong I thought the product was called a tbt tuning kit ?
     
  15. Dag

    Dag Pro Poster

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    I can see where you are coming from. The kit box in front of me states it is a TbT Full Drop-in Kit which is supplied by Tinbum Tuning but nowhere does it say on the box or the enclosed instructions which states they are Bespoke Airgun Parts that it is a tuning kit, Having said that it probably goes part way to the effect a tuning kit has doesn't it?
    Dag
     
    Last edited: Apr 26, 2014
  16. Meteor62

    Meteor62 Major Poster

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    Oh ok my mistake then and yes you are correct it does go part way and probably one that I will use in the near future.
     
  17. Dag

    Dag Pro Poster

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    I don't think you will be disappointed. If it goes as well on my HW45 as it has on my TX200HC then I'll be well pleased.
    atb
    Dag
     
  18. edtwozeronine

    edtwozeronine Donator

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    Nice to see other folks struggling to get to grips with their pistols all over the forum. :up:
     
  19. Tinbum

    Tinbum Delusions of adequacy

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    "Tuning" an air gun requires more than a few replacement parts or a more powerful spring. Just taking out the spring and polishing the ends and polishing the piston is more of a "tune" than a drop-in kit alone. But if you were to fit the kit and polish, deburr and smooth the insides it makes quite a difference and warrants the description in my view.

    I see my kits as enabling would be home tuners to achieve more with just the equipment found in any home. Also, none of my kits (including this one) are designed or intended to increase power levels.:)
     
  20. Tinbum

    Tinbum Delusions of adequacy

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    I got my first HW45 in '88 and have owned several since. Despite all this experience I'm still cack with a pistol, but I love em!:D
     

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