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Thread: Re arching a spring in SW Washington

  1. #1

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    Re arching a spring in SW Washington

    Anyone know a place I can get a spring re-arched in SW Washington state? Also, any guidance I can tell them aside from “uhh...maybe an inch or two that way”?

    Thanks!


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  2. #2
    Gordon Misch's Avatar
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    I might be able to help - sent you a PM.
    Gordon

    N4328M KTDO
    My SPOT: tinyurl.com/N4328M (case sensitive)

  3. #3
    hotrod180's Avatar
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    I've heard "take it to a sring shop" advice many times,
    but I've never even seen a spring shop-
    including when I lived in the L.A. metroplex.
    Cessna Skywagon-- accept no substitute!

  4. #4
    RVBottomly's Avatar
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    Quote Originally Posted by hotrod180 View Post
    I've heard "take it to a sring shop" advice many times,
    but I've never even seen a spring shop-
    including when I lived in the L.A. metroplex.
    We have a 4X4 shop that does modifications. I asked him about springs and he said he does them.

    But he also said using wood blocks, a heavy duty bumper, and a really long cheater bar did pretty well, too.

  5. #5

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    All you need is a tracing of the arc on a new bottom spring. I don't have one handy but will volunteer any of our members with a new spring on the shelf to send you one. I have done it in a vice with big wrench but easy way is with a press, patience, few blocks, and 5 inch or so pipe.
    DENNY

  6. #6
    TurboBeaver's Avatar
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    When you get to the point the spring has lost its arch, you are on the backside of things.... Unless it is softened and done
    Correctly to a new "spring temper' it is hardly worth the bother...... We used to " rebend" them years ago, with them usually just relaxing right back; or snapping off in the back but maybe you will have better luck. To recreate a spring temper' after you soften it to re arch it, you will need to " overharden it" first then draw it back to a " spring temper'.......good luck with that.
    I think I would simply buy a new Pawnee Spring and save the bottom of your rudder????
    Best of Luck
    E



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  7. #7
    fancypants's Avatar
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    I put a few different sets of new tail springs on my flatbed scanner to get the arc. I'll dig around for the PDFs later if that will help anyone.
    Likes DENNY liked this post

  8. #8

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    These guys manufacture springs I have had several different kinds of vehicle springs re-done, both leaf and coil, although several years ago. So there are still "spring shops" around. They did them correctly with heat treating, not sure what they still do.


    Pohl Spring Works Inc

    Website
    Directions
    Spring supplier in Spokane Valley, Washington

    Address: 6415 E Nixon Ave, Spokane Valley, WA
    Phone: (509) 535-3648








    Last edited by sburg58; 11-04-2020 at 09:29 PM.
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  9. #9
    fancypants's Avatar
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    Here's a flatbed scan of two sets of tail springs. Univair 4 leaf 1-1/4" set on the left, old but unused ABI 3 leaf 1-3/4" set on the right. Ruler for scale if you're trying to print it out.

    We'll see how this works, as the forum software likes to chew up attached images and spit them out as blurry junk. Here's a link to a higher quality image just in case: https://i.imgur.com/Uatw5y0.png
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  10. #10
    85Mike's Avatar
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    Matt, Long time since I've seen you on here!? Betts spring Inc. in Portland can make anything you need.

    Mike

  11. #11
    PerryB's Avatar
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    Quote Originally Posted by TurboBeaver View Post
    When you get to the point the spring has lost its arch, you are on the backside of things.... Unless it is softened and done
    Correctly to a new "spring temper' it is hardly worth the bother...... We used to " rebend" them years ago, with them usually just relaxing right back; or snapping off in the back but maybe you will have better luck. To recreate a spring temper' after you soften it to re arch it, you will need to " overharden it" first then draw it back to a " spring temper'.......good luck with that.
    I think I would simply buy a new Pawnee Spring and save the bottom of your rudder????
    Best of Luck
    E
    Agreed, a spring flattens from losing it's temper (like me) through years of load and cycling. If annealed, re-arched and re-tempered then it's basically new again. Otherwise you're just buying a little time, and the flattening will accelerate.
    After Monday and Tuesday, even the calendar says WTF !

  12. #12
    Gordon Misch's Avatar
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    Right. I did a lot of straightening of stuff (rotating shafts, hydraulic cylinder rods, etc) before I sold my machine shop. Cold straightening, gotta go a little past the desired point, then back to it due to hysteresis.
    Gordon

    N4328M KTDO
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  13. #13
    hotrod180's Avatar
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    Quote Originally Posted by PerryB View Post
    ....a spring flattens from losing it's temper .....
    I've been flattened due to losing my temper a few times myself.....
    Cessna Skywagon-- accept no substitute!
    Likes 40m, hman442 liked this post

  14. #14
    PerryB's Avatar
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    I'm German from both sides of the family. We don't lose our tempers.....
    After Monday and Tuesday, even the calendar says WTF !

  15. #15

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    Daammn all this time I have been saying I need to re-arch my tail spring because I fly heavy and screw up my landings (tail wheel first) I could blamed it all on temper!!! Just go bend the bitch and stop landing tail first. I have seen you fly, you got this.
    DENNY

  16. #16
    cubdriver2's Avatar
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    Time for a T3

    Glenn
    "Optimism is going after Moby Dick in a rowboat and taking the tartar sauce with you!"

  17. #17
    Steve Pierce's Avatar
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    Big truck springs lose there arch and get re-arched every day. I don't have a spring shop in my small town but there is one in Memphis where my folks live. My Dad is on a first name basis with the family that has owned and run it for 3 generations. They re-arch them cold and the springs on his Clipper which has a heavier tail than a Cub and gets landed on the tailwheel more often than not has lasted 1800 hrs so far. He introduced them to Airframes/Bushwheel when they were having spring vendor issues but unfortunately that didn't go anywhere.
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers
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  18. #18

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    More than one way to skin the cat I see...

    I ordered a new Pawnee spring, will compare them side by side, then re arch the old one as a spare.

    I don’t fly heavy often, but my hunting buddy has been stress eating lately 🤣

    Thanks for all the help everyone!


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  19. #19

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    I am with Steve on what actually happens. I was completely surprised that truck and Citabria springs are straightened cold. I always thought that heat treating was required. My first experience was at a truck spring shop - since then we just use a big press.

    But can I recommend an aluminum wedge? That's what I do most of the time.

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