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BC12D landing gear needed

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  • Mike S
    started a topic BC12D landing gear needed

    BC12D landing gear needed

    Digging around through the tie strut drain hole produced more rust than I care to see. I'd consider having the tie strut replaced if I could find someone to weld in a new one, but there's a splice done in '64 on the front "triangle" round tube so thinking I'll replace the entire unit. Left side needed.
    Click image for larger version  Name:	rusty tie strut.jpg Views:	2 Size:	128.7 KB ID:	182459
    Last edited by Mike S; 04-26-2019, 21:25.

  • 3Dreaming
    replied
    Originally posted by Mike S View Post
    Would you have a picture or two of this? I'm wondering how it looks, if the splice "blends in" with the bungee covers once the gear is reinstalled.

    Perhaps this is why some tie struts are open on the top end? Difficult to get a torch tip and weld around the cluster?
    Sorry, I don't have any pictures. It has been several years. You can see the where it is welded in, but it is tucked up under the fuselage. If you do both most people will not know it was not original.

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  • Mike S
    replied
    What I have done in the past is go with the next size larger tube. Cut off 4" down and slide over the existing tube, and do 1/2 of the splice.
    Would you have a picture or two of this? I'm wondering how it looks, if the splice "blends in" with the bungee covers once the gear is reinstalled.
    Splicing in 4 " from the top is much easier than welding in a complete strut at the upper cluster.
    Perhaps this is why some tie struts are open on the top end? Difficult to get a torch tip and weld around the cluster?

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  • sully
    replied
    Originally posted by waltermrich View Post
    Wag Aero and Aircraft Spruce sell stream lined tubing the size of the tie strut 1.349 major axis, but I was wondering if you can find streamline tubing to make a repair Like Forrest describes on a thread I read on the forum, that says cut the strut 4inches down do a splice and go from there , I think he is describing a tubing splice with an internal doubler , I cannot seem to find any streamlined tubing the size that would fit internally. Any one know of sources.
    Can you not insert a round tube inside and weld it to the streamlined.

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  • waltermrich
    replied
    After reading the ad again the tubing is oval tubing not stream lined tubing that is a slip fit, not usable for a splice for the Taylorcraft, although they do sell other sizes of streamlined tubing.

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  • waltermrich
    replied
    Thanks a bunch for the source for streamlined tubing its says right in the ad that the next smaller size tubing from there 1.360 will slip fit into it . That would make an internal splice.
    Last edited by waltermrich; 05-11-2019, 16:26.

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  • Mike S
    replied
    I cannot seem to find any streamlined tubing the size that would fit internally. Any one know of sources.
    Wicks is another... also: https://www.aedmotorsport.com/store/materials/4130-chrome-moly-streamline-tube-1 they seem to have a good selection.

    Leave a comment:


  • PA1195
    replied
    Thank you for the response. I wondered how this procedure was done and when older parts can be used. From my experience it's possible to have openings at the top cluster. Can that be sealed, and if so why is it normally still open?

    When I had my various Piper lift struts examined for corrosion I can vaguely recall pictures that showed contrasting metal in the lower strut. I didn't know what that meant other than they either passed or failed.

    What criteria are used to determine airworthiness by the facility? Do they figure out remaining metal thickness and strength? Or does any corrosion disqualify the part? Maybe it's been discussed here and I need to read that.

    I did recently see a local landing gear that had the diagonal replaced with round tubing and should go and look better at that repair.

    From the FAA's recommendation in Post #3:

    "Repair or replace any strut suspected or confirmed to have corrosion. We also recommend you repeat the inspection annually. Failure to detect and replace a corroded MLG tie strut can result in failure of the main landing gear with concurrent damage to the airframe structure."

    Note this disclaimer:

    SAIB:
    CE-11-05
    SUBJ: Main Landing Gear
    Date:
    December 3, 2010
    This is information only. Recommendations arenít mandatory.

    Gary
    Last edited by PA1195; 05-11-2019, 13:24.

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  • 3Dreaming
    replied
    I also think that before I would go to splicing in a new strut I would want to make sure that it really needed to be done. If I had an x ray facility close I think I would have it x rayed first.

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  • 3Dreaming
    replied
    Originally posted by PA1195 View Post
    If the diagonal strut is corroded why would it be spliced, especially the lower portion where moisture is likely to settle and corrosion occur? Maybe the upper end and lower solid portion would be salvageable? Just a question not being contrary.

    I can see if it's bent but airworthy then a repair can be done. Mine has one documented as being repaired by the inner sleve method per AC...............

    Gary
    Gary, typically the corrosion is only in the bottom end. If when the strut is cut off 4" from the top and there is corrosion splicing in a new lower section is not an option. Splicing in 4 " from the top is much easier than welding in a complete strut at the upper cluster.

    Leave a comment:


  • PA1195
    replied
    If the diagonal strut is corroded why would it be spliced, especially the lower portion where moisture is likely to settle and corrosion occur? Maybe the upper end and lower solid portion would be salvageable? Just a question not being contrary.

    I can see if it's bent but airworthy then a repair can be done. Mine has one documented as being repaired by the inner sleve method per AC...............

    Gary

    Leave a comment:


  • 3Dreaming
    replied
    What I have done in the past is go with the next size larger tube. Cut off 4" down and slide over the existing tube, and do 1/2 of the splice.

    Leave a comment:


  • waltermrich
    replied
    Wag Aero and Aircraft Spruce sell stream lined tubing the size of the tie strut 1.349 major axis, but I was wondering if you can find streamline tubing to make a repair Like Forrest describes on a thread I read on the forum, that says cut the strut 4inches down do a splice and go from there , I think he is describing a tubing splice with an internal doubler , I cannot seem to find any streamlined tubing the size that would fit internally. Any one know of sources.

    Leave a comment:


  • 3Dreaming
    replied
    Originally posted by astjp2 View Post
    Is that for the tie strut or the a111 fitting?
    It wraps around the bottom of the strut capturing the tube where the bushing goes.

    Leave a comment:


  • astjp2
    replied
    Is that for the tie strut or the a111 fitting?

    Leave a comment:

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