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J3 wood spar chewed by animal - Repair ideas

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  • J3 wood spar chewed by animal - Repair ideas

    Check out the spar on my pre-war J3....I am restoring it, but had not planned on replacing the spars as they otherwise look quite good. I plan to splice a new end on....what are your thoughts?
    [IMG][/IMG]

  • #2
    Re: J3 wood spar chewed by animal - Repair ideas

    Dano,
    Looks like where the damage is that it wouldn't be to much of a problem to splice inboard of the rib. I have made a few spars but haven't spliced one yet-you probably have what you need but the structural repair manuel for the C-61 has a very good description and illustrations for the repair and I can send you a copy if you would like one. Darn mice--may have to get a cat.
    Buell Powell TF#476
    1941 BC12-65 NC29748
    1946 Fairchild 24 NC81330

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    • #3
      Re: J3 wood spar chewed by animal - Repair ideas

      MICE!!! That looks like you had a Beaver! What is lucky is it is ALL the way at the tip. Very little bending load out there. The other thing is the damage is in the compression side of the aft spar and is outboard of the last aileron bracket. The FAA might not like it (beyond the regs for damage) but a repair there will last as long as the plane does.

      Hank

      Don't get a cat, get a mountain lion.

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      • #4
        Re: J3 wood spar chewed by animal - Repair ideas

        The thing I've found about doing splices, whether in a tube or on a spar....is that by the time you're done messing around doing all that splicing, you could have just went ahead and replaced it, and been about the same timewise...and had a NEW spar or tube in place, instead of a patched up one.
        John
        I'm so far behind, I think I'm ahead

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        • #5
          Re: J3 wood spar chewed by animal - Repair ideas

          Originally posted by N96337 View Post
          The thing I've found about doing splices, whether in a tube or on a spar....is that by the time you're done messing around doing all that splicing, you could have just went ahead and replaced it, and been about the same timewise...and had a NEW spar or tube in place, instead of a patched up one.
          John
          Don't you have to pretty much dismantle the wing to replace the entire spar?...seems to me you only would have to remove two ribs and splice it to the tip....if it really takes just as long to replace the entire spar....then I'm game....Let me know your thoughts on my opinion...I'm new to this.

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          • #6
            Re: J3 wood spar chewed by animal - Repair ideas

            Dan,

            That's an easy candidate for a splice........FAR easier than replacing the entire spar. The condition of the rest of the spar should be the deciding factor.
            MIKE CUSHWAY
            1938 BF50 NC20407
            1940 BC NC27599
            TF#733

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            • #7
              Re: J3 wood spar chewed by animal - Repair ideas

              Dan, if the spar the same dimension as the Taylorcraft rear spar I have a fixture to make the spice using a router. You can borrow it by paying postage. Dick
              TF #10

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              • #8
                Re: J3 wood spar chewed by animal - Repair ideas

                Originally posted by Dick Huish View Post
                Dan, if the spar the same dimension as the Taylorcraft rear spar I have a fixture to make the spice using a router. You can borrow it by paying postage. Dick
                The J3 rear spar is 4"x 15/16"....well, that's what I measured last night. What is a Taylorcraft spar?

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                • #9
                  Re: J3 wood spar chewed by animal - Repair ideas

                  Originally posted by Dick Huish View Post
                  Dan, if the spar the same dimension as the Taylorcraft rear spar I have a fixture to make the spice using a router. You can borrow it by paying postage. Dick
                  I'd love to borrow it....Tell me how we can work it out, and tell me, or show a picture of what it looks like. Do I have to remove more than the two ribs I already did? I'll PM you my Info.

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                  • #10
                    Re: J3 wood spar chewed by animal - Repair ideas

                    Dano,
                    Just to let you know - Aircraft Spruce has very nice preformed tip bows if yours has problems.
                    Buell Powell TF#476
                    1941 BC12-65 NC29748
                    1946 Fairchild 24 NC81330

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                    • #11
                      Re: J3 wood spar chewed by animal - Repair ideas

                      Originally posted by Buell Powell View Post
                      Dano,
                      Just to let you know - Aircraft Spruce has very nice preformed tip bows if yours has problems.
                      Yes, Thank you...I am replacing them. I have one non-preformed on that has been sitting in a tube in the hangar fo4 about 20yrs....

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                      • #12
                        Re: J3 wood spar chewed by animal - Repair ideas

                        Dano,
                        I am finishing restoration on a J-3 now and have 2 gallons of Poly Tone 146 OEM yellow left over--if you plan to use Poly Tone and want to buy it let me know and I can give you pretty good price.
                        Last edited by Buell Powell; 08-24-2011, 10:36.
                        Buell Powell TF#476
                        1941 BC12-65 NC29748
                        1946 Fairchild 24 NC81330

                        Comment


                        • #13
                          Re: J3 wood spar chewed by animal - Repair ideas

                          I SPLICED IT

                          [IMG][/IMG]
                          [IMG][/IMG]
                          [IMG][/IMG]

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                          • #14
                            Re: J3 wood spar chewed by animal - Repair ideas

                            Looks great Dan!!! Dick
                            TF #10

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                            • #15
                              Re: J3 wood spar chewed by animal - Repair ideas

                              Atta boy , the KISS method works most times.
                              Taylorcraft Foundation, Inc
                              Forrest A Barber 330-495-5447
                              TF#1
                              www.BarberAircraft.com
                              taylorcraft@neo.rr.com

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