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Scale 20cc DHC-2 "Beaver" Kit Build from Moustache Model Works

Discussion in 'Giant / Scale Scratch and Kit Build Threads' started by AKNick, Mar 27, 2020.

  1. AKNick

    AKNick 640cc Uber Pimp

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    After learning my supplied rudder linkage wasn’t going to work (nylon fitting wouldnt thread on) I finally figure out what would.

    Modified a Redwing push rod. Ground the wrench flats off, bent to mimic the original - except a bit longer, and inline with the rudder hinge gap. Then cut to length.

    1266B28E-694A-4072-84B6-045185A9A6E7.jpeg 96E65DAC-EF5F-473F-8967-9BA783658664.jpeg 6E1D9C94-8701-4AB9-B5D9-376BC45B7808.jpeg 15A0E5C7-9D61-42D2-B93E-2B2772162E34.jpeg ABD48A55-0298-4A91-857D-373DD6CD80A3.jpeg D1F4544D-148F-4A65-9986-2710F5F32442.jpeg A8B59544-96D7-412D-AFDD-CB6BAB4C46A1.jpeg
     
    pawnshopmike likes this.
  2. AKNick

    AKNick 640cc Uber Pimp

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    Wing strut mounts. Okay... so I’ve heard a few reports of the screws pulling out of the wing.... I didn’t realize there wasn’t much of a hard mount for the brackets.

    so I made a plan.

    Used M3x20 screws from McMaster

    M3 T-Nuts (Blind Nuts) from Micro fasteners

    Left over spar material to put the blind nut in and epoxy on top of the lower spar.

    Carbon G10 board on the underside of the wing to help carry the load and prevent squishing the wood.

    see my plethora of photos:
    F7461C66-533F-43B0-913A-5ECBE20E9C74.jpeg CE69DF77-6CC4-402E-88F9-D8E01CF4303D.jpeg 924531AD-3A0A-4A77-A0BA-1FD0C984DAF9.jpeg ED16F9EB-8617-4113-B421-70BD918D333E.jpeg AA724416-149A-4763-AB3A-F27C711488FE.jpeg 0EE2F9A5-AC66-4EEC-AC99-EBD95820D1D9.jpeg B367C3E7-AE0D-4E48-98D0-F9A0DC38BF20.jpeg D78E8E21-217D-465B-8459-1F868C0CF34C.jpeg 28E5D293-A984-49CF-A729-78745510327D.jpeg 8701F89F-2AC8-42E6-B7C8-F7264F68BAED.jpeg 6B6215EE-C9A2-42A0-B028-15FB7EC5F86A.jpeg 8BCF57C0-30F8-4CC8-A954-EBD51E92DC3E.jpeg 39EC06F0-BC8E-4982-A83B-723E601E9125.jpeg 2D170323-C016-4D38-AF27-272070B36B79.jpeg 3ED81722-C239-4744-9B49-379D021EE54D.jpeg 84FF5CC3-6889-4BBE-BB5C-EF3B5627E3A5.jpeg 7A438A52-06D6-4BCC-8CCD-005CE9BB3ED0.jpeg 17ABFFFA-B2F8-4A38-94ED-4670D2BD4282.jpeg 708936E2-5CE3-4FF5-85D8-DBB9B3A0C218.jpeg 50F69866-2D56-42C5-9ECF-3D10A5EE5D58.jpeg 0E5AC06A-F5E4-444B-95A2-9EDE91C2F322.jpeg 1879C37E-1622-45F6-9295-4895BF46E445.jpeg 6C1B92F0-F7CE-43D7-9885-F47C5597E4D6.jpeg 381BE7DF-0486-4B63-89AC-7207424886FB.jpeg 1C2B87A4-96A4-461E-98D4-D6CD91B36AF7.jpeg 2F0EBD8E-CB09-40D4-B677-6556D66D293B.jpeg C8419361-E732-409B-ACFE-35A995775136.jpeg 71318076-B1C8-46CD-9E94-15987A4A2294.jpeg
     
  3. AKNick

    AKNick 640cc Uber Pimp

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    Glued my custom rudder tiller bar in place. Since my shop was cold I decided to drain a LiPo to death (bad cell) and use its heat to warm the epoxy. Efficiency folks.

    CB4781CC-000C-4B3B-A738-0055171901EA.jpeg 05DDF09F-BFD8-4F8D-919F-BE5ADB2CA805.jpeg 662F8964-C1DE-4BF1-B81A-13A4111248D6.jpeg DEB90A0A-A2E8-451B-901B-76E50C45020F.jpeg 75DBB36E-4573-4894-9096-3FB36EE2D9D7.jpeg FFAC28BD-F09D-49A5-83CF-1F4F4CC954BA.jpeg

    then I finished routing my wires to the end rib. Along with a hole for my beacon wire.
    43D42C9F-61DB-41C2-84B8-908ED103BF11.jpeg E3462D15-E6EA-4C9C-9A92-9CF41F4F511F.jpeg 99DC0FBE-216D-47D9-959F-598955001554.jpeg 026F9213-F129-41B7-9689-9D286AC0F390.jpeg
     
    -Rick- and pawnshopmike like this.
  4. AKNick

    AKNick 640cc Uber Pimp

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    MMW gives an etched cutout for a possible throttle servo location. It looked pretty good for my Standard MG servo, so I decided to go with it. What I didn't realize is that my custom throttle arm linkage was slightly longer, so I ended up cutting more material out to move the servo aft a little bit. The manual shows using some spare blocks to go on top of the deck, I ended up putting them underneath the floor.
    C5069D6A-CAF9-464C-9C85-7E2A12E3FEA9.jpeg A6474D07-D330-4E19-82BF-F2E5FFC295AE.jpeg 7362505D-5A49-4261-B00C-5AAF1A6A5B20.jpeg A6ECF5EA-4712-463F-AD4F-F3B03761B540.jpeg 9DB42DDC-FD30-4B0F-AF84-8042175ABBC7.jpeg

    Measured the distance to the servo arm from the deck and transferred it to the fwd firewall. Looked from the top to get the angle from the servo arm to my custom extended throttle arm, drilled, and then elongated to get the right clearance.

    CED8BAC7-B3AD-4A99-B06D-C5F208367C2E.jpeg B3160EBB-E370-4C6B-BD22-773D6F4D373D.jpeg 9D0E3143-ADB5-4193-B630-6D3BFFD28111.jpeg 67C03237-BD5F-44E3-8A2C-E637294A3CEE.jpeg 43B4BDC6-3128-4E88-98E8-FFEDC17435CE.jpeg

    The Ignition module location is pretty obvious, right on top of the motor box. Found a spot I liked then made a couple slots to let the module fit snugly with a piece of foam underneath it.

    EED61986-155E-4A7F-A4C6-9A18D96AD465.jpeg 33A472BD-0218-4CF0-9FAD-81CB90B3E95C.jpeg

    Then routed the ignition wire to make a smooth path to the plug, made a couple clearance cuts, and a little standoff to put a zip tie around so the wire wont float to the cowling and rub against it.

    E96CE8C3-8F21-410F-B17C-92332739BCF7.jpeg

    Got a little ambitious and made a hole for the fuel line vent. Thinking back I probably should have made it a little further away from the ignition wire, but its fine.

    19BC6554-CB70-4137-9140-EEF700D57C54.jpeg C95A49C0-3C44-4D94-BC4F-E43EBD603C11.jpeg

    Joined my elevator halves FINALLY, used some clamps and standoffs to keep everything as true as possible, keeping in mind I can fine tune it a bit by bending and installing my robart hinges.

    B23126C6-C35B-4B97-AFE4-C1F7599F4E56.jpeg 985B9145-A659-415A-AEFB-24FCECBCE763.jpeg D4E56465-520C-4997-9D6D-7E66CE0CEF4E.jpeg 55E6619B-E1B7-4CB4-8DBC-4F41E4EE4090.jpeg
     
    Last edited: Feb 21, 2021
  5. AKNick

    AKNick 640cc Uber Pimp

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    Made some long awaited visual progress. Covered the ailerons, flaps, and rudder using Hangar 9 Ultracote Brite Yellow.

    here’s a photo dump of how I tackled it. I’m no expert here, but my process is low temp, bottom to top, overlap the seams in the direction of airflow.

    Next up is the tail feathers. A bit nervous to cover the vertical as it has a sharp leading edge with a lot of curvature which will be easy to introduce warpage.
    1003B7A8-1974-47FE-A36E-C5E4F5F7631A.jpeg 6312F983-3323-4E00-91A6-BFBC1EDF358A.jpeg B0F31AEF-8540-460C-AEEF-72D720A3E00F.jpeg 95FA86CC-C88E-48C2-9FF3-03CBBA2D66F8.jpeg DF6EAD65-F2A0-4F31-B005-F27F2D41B60C.jpeg F864FCE8-5076-4C7D-A8DA-6F4605F70234.jpeg C2AD296D-45C7-4293-8611-B578C2AF3469.jpeg 33D5F44A-C176-4A34-98F4-98A14147397D.jpeg 8324D6C4-E325-42E8-973D-D7690B1690A8.jpeg DAA01E59-654A-449A-9EB9-AD42681920B8.jpeg 1C8CFC3D-8A48-44B1-AE7D-6131F07DF97F.jpeg 7CC42B61-E7A2-420B-90DA-3E28C806C280.jpeg 4A221E1E-2493-4152-B2C9-3371E63AA79F.jpeg 00FAB3F6-DDB4-4FF2-9C0D-DAD6C7378BCA.jpeg 868ED757-9C85-4292-99C5-A104E5E5F68F.jpeg EB075BAE-9063-4826-98BD-73677778A543.jpeg 9C8EB038-8706-47EC-A046-CF8DE608E31F.jpeg 4365B6F6-7216-44EA-94C3-4C182AAED78F.jpeg 5AE7F01F-6FB4-4328-A4A4-5F6949A06AE8.jpeg 396B9EA6-AFFF-45CA-9C43-B57A956BF072.jpeg FACE71E2-DA17-4216-8A5A-A919FB5B49DA.jpeg BE56DE85-FDF3-4D6F-9483-0CAA38BD6FE5.jpeg B0588370-5EC4-4B13-98D4-1FCCBA4A7CC2.jpeg 35CA6A2A-6146-4537-ACE3-CA05EE6CA647.jpeg 311CEBC2-4479-431D-ABEE-6AD10775A81D.jpeg E0F9D555-EDCE-4552-871D-6DAD914EAAE5.jpeg
     
  6. AKNick

    AKNick 640cc Uber Pimp

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    Covered the elevators.
    87DD74D0-1C65-478D-ADD1-6F14009B5FA0.jpeg ACC6FE24-35F1-4B9C-A0D3-41A8B0C77F6A.jpeg 42ACFF7D-D349-4813-BEBC-F9720DC9D271.jpeg 5C307B6E-9695-4F7B-8BA2-9ADB82E60687.jpeg 1D0DC1C6-5A1A-4884-8F5F-A82869A73E5B.jpeg 66A6907D-7A48-4109-958A-BC25FA16E76D.jpeg
     
    TonyHallo, pawnshopmike and WMcNabb like this.
  7. AKNick

    AKNick 640cc Uber Pimp

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    Covered the vertical stab.

    first side I did the tack and low temp iron trick, it worked. The next side turned out much better ironing from back to front.

    Now that all the surfaces are covered (except the trim, and horizontal - more on that later) I used my pencil Wellner iron to burn the robart pin holes out. This helps seal and leave a nice clean hole for glueing the pins later.

    8F408AB4-F077-41C4-AF5B-F3693D6B2A2C.jpeg 9A964BCD-8455-4403-8902-067DA1599980.jpeg 89AF364F-0698-4769-AA93-528D6C714442.jpeg ABA668FB-5AAD-4714-B8D4-323CE9694C58.jpeg 036D278C-0467-4C7A-AFB0-0872F7C4ECEE.jpeg 1D30DC7A-E1B0-47A7-9C32-10FAF34B57CC.jpeg 5F92D73D-4FB1-4765-8D67-E85F1EBDE94E.jpeg E301869B-EE6B-4DC9-9B3C-9D7C40DBB727.jpeg 8FB898DE-2303-4258-B8D3-460D45A46AEE.jpeg 7140209D-541F-4393-91C3-155C84308C7C.jpeg 5FDAD5D9-E0A4-4150-8260-890EC168F24E.jpeg 81BC1D55-729D-4BC3-871B-FC5B28AF432B.jpeg 0BC0E407-E3CC-4035-A914-85269544900F.jpeg 45124673-C5F2-466B-B76F-1AFB7C7FCE32.jpeg 23F0F30B-47D6-4C64-9D19-132A44D28A67.jpeg
     
    -Rick-, pawnshopmike and WMcNabb like this.
  8. AKNick

    AKNick 640cc Uber Pimp

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    Silly me for thinking I could just cover the doors really quick. Took me 1/2hr per door! Burned out the hinge and handle locations. I’ll add the blue and stripes later
    3BCAA02C-347B-4E35-803A-FFF32F0A955D.jpeg 71D26D58-4FF6-4F1D-BBBE-5B3B25801CBD.jpeg 3937EF53-C30A-446F-88CA-2BFA8E45086F.jpeg 480EDB79-E863-449F-886C-9901106752DE.jpeg
     
    TonyHallo, Snoopy1 and pawnshopmike like this.
  9. AKNick

    AKNick 640cc Uber Pimp

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    Got some warp in my rudder... hmmm not sure whether to live with it or try to fix it. Pretty sure it’s the build and not the covering.
    44B5F8E3-027E-4F1E-B143-FDAFEE758C25.jpeg 033E97B1-0F19-4712-BEE7-3697B05CC472.jpeg
     
  10. Snoopy1

    Snoopy1 640cc Uber Pimp

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    Hard call to make unfortunate that is turning the plane to left. If it was to the right I would leave it, but to left try to do something, easier said than done. The only way I can think of doing is strip the covering of one side twist the rudder in the correct direction until some of the ca joints crack and then re glue it holding it flat or even a little to much. Just suggestion. Or fly it and see how much trim it needs and then decide.
     
    AKNick likes this.
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