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California Smelly...yak 2

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  • #16
    Pretty cool! Blue foam is great!

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    • #17
      Cowl separation so I can glass it for plug purposes. The 3M 77 spray adhesive did a good job of keeping things together.

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      Since I'm going to need tail weight I might as well put the flight / ignition batteries in the back. Used a CamLoc fastener the make access easy.
      I liked Len's cover plate for access to the tail wheel servo

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      • #18
        Nice stuff Scott, but as you made it a turbine version, you should install a turbine!!
        Who's CamLok are you using?

        Jeremy
        SCCAAA TT TN

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        • #19
          Hi Jeremy,
          The CamLoc thats pictured are CamLoc 4002-3 ( Cad plated , 0.111-0.141 depth ) series Studs and the Cad plated receptacles. I see on the Aircraft-Spruce website there are a couple of options now. It was a toss-up weather to go Phillips or slotted......all depends what type of hole / dent you want to put in the skin when you miss......

          The turbine would be super cool but just not practical for towing and the 25 hr maintenance interval is a bit of a hindrance.

          Scott

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          • #20
            Scott, super cool! I hope this new tug gets a chance to tow my repaired KA-6 this summer. Maybe I should say, I hope my KA-6 can be towed up by your new tug this coming summer. Thanks again.
            Larry

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            • #21
              Hi Larry,
              Looking forward to towing your big KA-6.

              Some fun stuff today, made the little turtle deck on top of the cockpit and covered it with 1/64 ply. I used overhead projector clear sheets to copy the profile image off my computer screen after zooming in to get the approximate size.
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              Since the instrument panel and sheeting is a different shape than the Radial cowl, I used some paper and tape to approximate the correct shape and then "sanded to shape".

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              Next step is some fiberglass on the forward deck and then the Cowl

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              Last edited by MarnochS; 01-07-2019, 02:38 AM. Reason: Spelling, of course

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              • #22
                Getting closer to being a Plug.....primer....sand....primer....sand.....prim er......sand...

                the white primer doesn't build up very much like the gray stuff (primer&filler) from Krylon.

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                Last edited by MarnochS; 01-08-2019, 04:33 PM.

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                • #23
                  Fun with Epoxy & fiberglass....

                  mocked up a parting board with some construction paper and then transferred to some 1/8" plywood. Covered it with some leftover UltraCote. Who says a parting board has to be white......
                  Attached with hot melt glue after waxing the ..... out of the plug.


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                  I'm committed now..........for better or worse....I'm planning on a 3 part mold......easy part first......

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                  Graphite powder gel coat and then glass and then mat ( the stuff that is needle like when you get some epoxy on a fiber )
                  Attached Files

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                  • #24
                    So....the hot melt glue did a little damage to the plug, not much , just melted the primer......on a good note, the Frekote 700-NC is super cool as the parting board came off with out a problem.

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                    Next step is the front parting board.....a little more challenging to construct but the construction paper made is pretty simple.

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                    Stickers via USPS.......and more fiberglass via UPS and http://www.Thayercraft.com

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                    Last edited by MarnochS; 01-12-2019, 07:03 PM.

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                    • #25
                      Productive day on the Cowl mold
                      Saw a video on YouTube where they used the partall wax to seal the seams and thought I'd give that a try......It would work really good if I'd have painted my plug with a two part epoxy primer. Since it was only rattle can primer, the wax partially removed some of the primer ( food for thought next time....). Other than that, it worked great......

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                      Then on to the other side......

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                      Now, the real trick will be to extract the plug........
                      Attached Files

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                      • French1
                        French1 commented
                        Editing a comment
                        Well Done Scott, really great work!

                    • #26
                      Successful Extraction ...YEA !!!

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                      After some cleanup with solvent to get the primer out ....time for the Frekote Mold Sealer ( FMS ) wipe on process.

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                      • #27
                        Nice work with the plug and molds. Builds arm muscle, too!

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                        • #28
                          Thanks Mike.

                          Two layers of 5.8 oz plain weave. On the intake scoop to spinner transition, it's a bit of a severe angle.....found if I cut a 1" strip at a 45 degree angel to the weave, it lays down nicely.

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                          Reinforcing tapes and some 410 microlight fairing filler on the intake scoop.

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                          • ARUP
                            ARUP commented
                            Editing a comment
                            Wouldn't it be nice to have some of those fancy bladders to put in there to hold the glass in place in an assembled mold? Nice work with a tedious process!

                        • #29
                          Going with a split cowl and Ring mount so I added the divider (two layers of 1" standard fiberglass tape ( Partall Film #10 brushed on the top cowl )

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                          and then I couldn't stand it any longer and just had to get it out of the mold.......

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                          YEA !! !!

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                          • #30
                            Very interesting!

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