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  1. #51
    Mastertech's Avatar
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    RE: Lightning Build

    I still object to you using the word "Work" when you're flying F-16's for a living.

    Be a kid forever, fly models.

  2. #52

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    RE: Lightning Build


    ORIGINAL: Mastertech
    I still object to you using the word ''Work'' when you're flying F-16's for a living.
    +1
    Doug Cronkhite

  3. #53
    Viper Driver's Avatar
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    RE: Lightning Build

    In my time away from "WORK" I managed some progress. Here, the lower stringers are installed. Also, a picture from nose on to show the curves a bit.

    Next I will be doing some wetting and bending of balsa to fit the bottom.
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    Jeff Carder

  4. #54

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    RE: Lightning Build

    Wow Jeff that's amazing.

    Have you got plans for that?
    Go knife edge your cub!

  5. #55

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    RE: Lightning Build

    Very nice work and the plane looks great!
    I've been looking at this thread for a while and learned a few tricks here.
    Thanks.

  6. #56
    Viper Driver's Avatar
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    RE: Lightning Build

    Rendegade, check your PM.

    Alex, thank you for the complement. You know what goes into one of these first hand.
    Jeff Carder

  7. #57

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    RE: Lightning Build

    Nice work Jeff. Keep the pics and updates coming. I look forward to seeing the final product.

    How have you been? It's been a long time since we conversed.

    Alan Wellentin

  8. #58
    Viper Driver's Avatar
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    RE: Lightning Build

    Alan,

    Great to hear from you. Don't hear much out of the old D8 crew these days. I would love to get back out there for a contest one of these days. The old days at the EAC contest were great! Keep checking in on the progress.

    Jeff
    Jeff Carder

  9. #59
    Viper Driver's Avatar
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    RE: Lightning Build

    My solution for light weight servo wire conduit.
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    Jeff Carder

  10. #60
    Viper Driver's Avatar
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    RE: Lightning Build

    I added a small piece to make the existing sheeting straight down the length of the fuselage to ease the difficult job of sheeting the bottom.
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    Jeff Carder

  11. #61
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    RE: Lightning Build

    Beautiful work Jeff.

    -mark
    NSRCA 3656
    www.NSRCA.us
    www.insightrc.com

  12. #62
    Viper Driver's Avatar
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    RE: Lightning Build

    Thanks Mark. Still waiting to see your new bird.
    Jeff Carder

  13. #63
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    RE: Lightning Build

    Now, on to the task of sheeting the bottom of the fuselage. This is more complicated that sheeting the top as the curves are more complex. In order to make it manageable, I am sheeting it in four sections. I don't have a good shape pre-mold like I did for the turtle deck sheeting, so it is all done on the fuselage. To keep it from getting waves, I only wet the inside of the wood, and I use balsa sticks pinned along the edges to keep them straight. When I tape the sheets to the fuselage, I only wrap it around where the formers are to prevent waves. I shape the edges of the wood prior to wetting, much easier to sand!

    Here are pictures of the first two sections on the fuselage for molding, and after they dried and were removed.
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    Jeff Carder

  14. #64

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    RE: Lightning Build

    Looking good Jeff, did I tell you Alan is planning a pattern come back!

  15. #65
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    RE: Lightning Build

    Now that the first sections are formed, it is time to glue them on.

    Here is a little trick with Gorilla Glue that I can't believe I didn't think of earlier. I used a syringe for glue for application which made it much easier than trying to use the bottle and sticks to spread the glue. I was able to use much less glue as I could apply it exactly where I wanted it. The syringe cleaned up with alcohol so I can re-use it.

    I placed the seam along one of the stringers to help keep the edge of the sheeting straight.
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    Jeff Carder

  16. #66

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    RE: Lightning Build

    Hi Jeff,

    Great work! Good to see getting back to r/c. How do you clean the syringe? I have tried that with some nyrod and made a mess.
    Anthony Romano
    Team Airtronics, Team Castle Creations
    Wrong rudder is the most powerful force in the universe.

  17. #67
    Viper Driver's Avatar
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    RE: Lightning Build

    Anthony,

    When I finished gluing, I squeezed as much glue out of the syringe as I could. Then I filled a bottle cap with denatured alcohol and filled and evacuated the syringe multiple times, which got most of it. To get the gunk out of the tip, I used a scrap of 1/8" square balsa stick, with a slightly sharpend tip. I stuck it through the back of the syringe and twisted it to bring out the remaining glue. Then I swished more clean alcohol through it. That left it clean enough for further use.
    Jeff Carder

  18. #68
    Viper Driver's Avatar
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    RE: Lightning Build

    Section three and four of the bottom sheeting are molded in the same manner as the first two. Balsa holds shape very well once it is dry. Once I removed the dry sections from the fuselage, I trimmed the edges to make nice seams. This is difficult as prior to having the sheeting glued on, the stringers and formers have a bit of flex. As you try to hold the parts into their final position to test the fit, you distort the structure with the pressure of holding them in place. It may look beautiful has you hold everything together, but when you take your hand away, everthing springs back into place and your seams open up. This is exactly why I keep large tubs of filler on hand.

    Electrical tape was not required at the balsa sticks I used to hold the edges down while gluing are covered with a layer of clear packing tape. Easy mold release! The syringe technique also made for much cleaner seams.
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    Jeff Carder

  19. #69
    Viper Driver's Avatar
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    RE: Lightning Build

    I have finally cleared out a mountain of blue painter's tape in my garage to reveal a 99% complete fuselage. The only steps remaining are to install the wing and stab sockets, and then sand to final shape. Also, I left the sheeting off of the bottom of the subfin area to allow access to the stab socket. Once the socket is glued in, that area will be sheeted. Right now, the fuselage weighs in at 20.8 oz. For comparison, the prototype weighed 28 oz at the same stage. Now, on to wings and stab.
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    Jeff Carder

  20. #70

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    RE: Lightning Build

    Looks fantastic Jeff! Your a professional "balsa bender" keep up the good work!!

    Todd

  21. #71
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    RE: Lightning Build

    Awesome work Jeff!!!

    Arch
    Team Futaba, Aero-Model / Hacker, Tech Aero Designs, F3A Unlimited, Team BJ Craft, Thunder Power RC, Castle Creations

  22. #72
    Viper Driver's Avatar
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    RE: Lightning Build

    Todd & Arch,

    Thank you for the good words. I have put in quite a few hours in the last few days, making good progress. I made it out flying today as well...have to remember how to fly too!

    Jeff
    Jeff Carder

  23. #73
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    RE: Lightning Build

    Take your time remembering unless you are going to fly FAI

    Jeff,

    I remember the masters finals a few years ago, it wont take you long to return to that form!

    Hope to see you are the field,

    Chuck
    Mark Hunt Designs

  24. #74
    Viper Driver's Avatar
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    RE: Lightning Build

    Chuck,

    Good to hear from you! I miss the good old days of D6 post flying beverages. Glad to see you have one of Mark's Harmony kits, looks like a great plane.
    Jeff Carder

  25. #75
    Viper Driver's Avatar
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    RE: Lightning Build

    On to the wings. They are more or less conventional foam and balsa wings. I do use some strips of carbon fiber for reinforcement. I had the cores cut by Mark Hunt, Insight RC. The unique thing about the way Mark does wings and stabs is his "honeycomb" method. He drills a grid of 1/4" holes rather than the traditional square pattern. I use a 1/8" lightply rib at the end of the wing socket. I also cut the holes for the aileron servos and install balsa boxes prior to sheeting. I made a tool out of 1/16" wire to cut the hole for the aileron servo leads. It is a simple loop that plugs into my soldering gun.
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    Jeff Carder


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