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Some day it will sprout wings

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  • Gene C
    replied
    A few of us must just have charmed builds. The wings for the LK-10A were placed on the fuselage from the building board for measuring this morning. The results were surprising as the alignment with the horizontal stabilizer was perfect, with only the wings to rudder post off by less than 1/16" an this from a chap that hates building wings. Now to epoxy the wing tubes in place before setting it aside for a small repair on another airframe before continuing.
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  • Gene C
    replied
    Work continues on the wings as the Left wing was finished up to having the leading, trailing edges and upper aileron spars glued in place. This was fitted back on the fuselage to have a look see and help balance the airframe for gluing the Right wing root rib to the wing spars. Once the root rib was braced the assembly was secured to the building board for placing ribs on the Right wing spars. When the two are equally finished to the same point as the Left wing both will be placed back on the fuselage for finial measuring before the wing tubes are epoxy to the spars and root ribs.
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  • Gene C
    replied
    Assembled the trailing edges from 1/32" ply, carbon tow, epoxy and masking tape. After being clamped to a straight edge overnight they were cleaned up and dry fitted to the wing ribs. Even though the full size LK-10A had a 50' wing span, long and skinny they're not.

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  • Gene C
    commented on 's reply
    Gunny, it's all thanks to a fellow modeler and full size vintage restorer, that rip them full length from Aircraft quality Spruce. No splices, straight grain what more could a scratch builder need, except for maybe already completed wings.

  • gunny11
    replied
    Wow! That's looking perty... Nice long straight grains in your spruce spars.

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  • Gene C
    replied
    After a few dry fits the wing root rib was glued to the upper and lower spars, leaving the wing tube free for the moment. This was done while the root rib was attached to the fuselage stub wing and braced until secured to the building board. Spacing of the ribs used two 1-2-3 blocks and a 0.008" business card (taking in account rib material thickness) to maintain a 4.125" rib center line spacing. Shear webbing was then cut and fitted before gluing on the leading edge half ribs. A clamping procedure was worked out to apply equal pressure on the shear webbing to spars before starting the process of gluing the shear webs to the wing spar. Time is now on the side of the wing as there is a lot left to do and that's just for Left wing. All to be repeated for the Right wing.












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  • Gene C
    replied
    Does sprouting spars count? Wing ribs are ready for assembly but there is some work to be done on the spars yet. Charley my shop cat is bored to tears just watching it seems.
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  • Gene C
    replied
    It was inevitable that the LK build would come to this "WINGS", the least enthusiastic part. The main reason is that you have just finished a 92.8" wing panel to turn around and build another one "exactly" like the one you just finished but opposite. That said you have to start the wing process somewhere and that should be spars. Over the years a few methods have crossed my way to make the spar lamination a little less messy. Starting with and easy to made epoxy spreader to apply and even amount of epoxy to the spar surface and a syringe to apply a bead of epoxy to the spar surface before spreading. Of course a flat building surface, an aluminum channel and plenty of clamps helps immensely.


    https://youtu.be/my4ngCeXhg4
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  • ARUP
    commented on 's reply
    If you would build ugly ones like me you wouldn't need no stinkin' fillets! lol Great work!

  • Gene C
    replied

    Well at least the wing fillet panels have been molded.
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  • gunny11
    replied
    Yup, they do require a huge amount of time, but looking at all your efforts, they sure look fantastic!

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  • Gene C
    replied
    The fillet bucks started off well but just when the first attempt was ready to mold a new in depth photo was sent to me. After communication with the two LK owners it was necessary to make some modifications, as the LK in the photo and the one I’m using for scale (bare bones at this time) both have extremely large wing fillets. Nothing that filler, epoxy glass, more filler and paint could not cure, plus a generous portion of time. Finally it was time to mold the fillet bucks so two days in preparation plus four hours of intense epoxy work left only an overnight wait to see the outcome. Prefect, NO but with only a few voids to fill, a most satisfactory outcome. Now the upper wing substructure in the aft cockpit can be removed, lower wing surface with window and molding of new wing fillet panels can be accomplished.
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  • Gene C
    replied
    Before working on wing fillets the fuselage stringers were given a Amber hue. The wing fillets are in a process of experimentation at this time while working on the total fillet effect assembly. Most likely an epoxy glass form from the wing tube to the trailing edge. This may take some time to workout though as nothing is in concrete when scratch building.
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  • yyz
    replied
    Amazing craftsmanship!

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  • ARUP
    replied
    Neat stuff!

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