Klingon D7 Battlecruiser "Vengeance"

Discussion in 'Rocket Boosted Gliders' started by Crawf56, Feb 9, 2018.

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  1. Mar 13, 2018 #31

    Crawf56

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    As usual, I make mistakes..... :facepalm:

    Sanded the gap too much between the foam wing additions, leaving a gap between them and the tube. Used small amounts of 5 minute epoxy to fill the gap.

    m_IMG_2649.jpg

    m_IMG_2648.jpg
     
  2. Mar 13, 2018 #32

    Crawf56

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    More of the tube support structure added.

    m_IMG_2650.jpg

    And the warp motors:

    m_IMG_2651.jpg
     
  3. Mar 13, 2018 #33

    burkefj

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    You don't need to add epoxy, the side plates will tie it all together without adding weight. There is low stress on the neck unless you power prang it.

     
  4. Mar 13, 2018 #34

    Crawf56

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    Installing control horns:

    m_IMG_2653.jpg

    And here is my radio gear: a Tactic receiver with Futaba 3114 servos.

    m_IMG_2654.jpg
     
  5. Mar 14, 2018 #35

    Crawf56

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    Hmmm........thinking the Model Master Tropical Torquiose does a fairly good job of matching the early KDSF colors [Klingon Deep Space Fleet].

    m_IMG_2655.jpg
     
  6. Mar 14, 2018 #36

    burkefj

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    Are you going to bevel or radius the leading edge, I think that will help the drag quite bit....I like the color.

    Frank
     
  7. Mar 14, 2018 #37

    Crawf56

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    Yes, I am going to 'round' the leading edge. The rudder is not attached in the pic; just having fun. :cool:
     
  8. Mar 14, 2018 #38

    burkefj

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    I seem to need to do dry fits as I go, helps me get motivation to finish:)
     
  9. Mar 15, 2018 #39

    Crawf56

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    I promise to only use Aerotech motors with my D7 Battlecruiser.
     
  10. Mar 17, 2018 #40

    Crawf56

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    Well, I have to deal with a design issue: The Battlecruiser is set up for a launch rail, BUT......I use a launch ROD.

    m_IMG_1462.jpg

    The design of the nose means that I cannot just glue a launch lug to the body tube. I am thinking I need a launch lug that is offset from the body, so that it will miss the nose/bridge.

    IMG_2655 (2).jpg
     
  11. Mar 17, 2018 #41

    burkefj

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    If you don't ever lunch from a rail just remove the buttons and slice off the nose skid and glue a lug on the bottom, or glue a 7" long 5/16" square stock spruce to the bottom tube between the buttons to get clearance and then glue your lug to that. You can use screws to go into the body tube to secure it so it is removable, or just get a rail it's so much better.
     
  12. Mar 18, 2018 #42

    Crawf56

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    Here is a look at my electrics:

    m_IMG_2679.jpg m_IMG_2680.jpg
     
  13. Mar 18, 2018 #43

    Crawf56

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    Sanding the leading edges, rounding the wingtips. I like to do this outside, so the foam dust gets blown away.

    m_IMG_2682.jpg m_IMG_2683.jpg m_IMG_2681.jpg

    What is funny is that I looked at the last pick and thought, "That needs for rounding."
     
  14. Mar 18, 2018 #44

    Crawf56

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    OK, working on the launch lug:

    m_IMG_2684.jpg m_IMG_2685.jpg
     
  15. Mar 18, 2018 #45

    Crawf56

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    There is a tab on the front of the boom, that acts as a "nose landing gear". Tried to remove it, but it is well in-place. Decide to offset launch lug.

    m_IMG_2687.jpg m_IMG_2686.jpg
     
  16. Mar 18, 2018 #46

    Crawf56

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    And weights to hold items in place. Using 30 minute epoxy.

    m_IMG_2688.jpg m_IMG_2689.jpg
     
  17. Mar 20, 2018 #47

    Crawf56

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    Launch Pad test:

    m_IMG_2694.jpg m_IMG_2691.jpg
     
  18. Mar 20, 2018 #48

    Crawf56

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    More launch pad looks:

    m_IMG_2693.jpg m_IMG_2692.jpg
     
  19. Mar 20, 2018 #49

    Crawf56

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    Servos, battery, receiver installed. Note that I got a bit carried away with paint, and had to sand off paint for a gluing surface.

    m_IMG_2695.jpg
     
  20. Mar 20, 2018 #50

    Crawf56

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    Rudder gluing. Marked location, used slow foam CA so I had time to get the rudder set like I wanted.

    m_IMG_2696.jpg m_IMG_2697.jpg
     
  21. Mar 20, 2018 #51

    Crawf56

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    Put in an engine, and check balance......

    m_IMG_2701.jpg m_IMG_2702.jpg
     
  22. Mar 20, 2018 #52

    Crawf56

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    I ended up needing three of the 7 gram weights in the nose for proper balance.

    m_IMG_2704.jpg

    Had an All Up Weight [AUM] of 11 oz (315 grams?). (Motor, battery, ready for launch).

    m_IMG_2705.jpg
     
  23. Mar 20, 2018 #53

    Crawf56

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    Chin cover taped in place:

    m_IMG_2706.jpg
     
  24. Mar 23, 2018 #54

    Crawf56

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    m_IMG_2716.jpg


    Wej..........Cha..........Wa.............QAPLA!!!!! ("3....2....1....Success!") :headbang: :headbang: :headbang:

    Had a successful first flight this evening. The model performed well; it really 'floated'. Responded well to the controls. A slow glide.

    Only issue was my initial settings. Dynasoar recommends some down trim on the elevator. But my Pegasus rocket glider (Dynasoar) needs no down trim on launch, so I used very little down trim on the D7 Battlecruiser. My Battlecruiser needs more down trim at launch, probably at least 1/8".

    I also wonder if I have a little TOO MUCH nose weight. Need more flights to verify this. (Dynasoar recommends two of the 7 gram nose weights; I used three of them.)

    Landing pic:

    m_IMG_2717.jpg
     
  25. Mar 23, 2018 #55

    burkefj

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    Very cool, yes I've found both of mine need downtrim on boost. For nose weight I don't spec a number of weights, just the CG, I'm using two but will depend on your build. Also I use a balancer, I saw your pic using fingers, that's not very accurate you can be off 1/8 to 3/16" using fingers.. If the model isn't pitchy on boost you can remove a bit at a time, if it's floating well on glide I'd leave it alone.
     
  26. Mar 23, 2018 #56

    Nytrunner

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    T'kuvma would be proud
     
  27. Mar 23, 2018 #57

    Crawf56

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    I have not watched Star Trek: Discovery, but my wife said it was good. Got to get to it!

    By the way, I am a Klingon Kommadore:

    m_IMG_2723.jpg

    On the left is my Dynasoar Battlecruiser rocket glider; on the right is a Cyberplanes D7 radio control model. (Sadly, I think Cyberplanes is out of business.)
     
  28. Mar 23, 2018 #58

    Crawf56

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    More pics of my Klingon "ships".

    m_IMG_2722.jpg m_IMG_2720.jpg m_IMG_2724.jpg
     
  29. Mar 23, 2018 #59

    burkefj

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    Very fun, did you fly with Al Clark?
     
  30. Mar 23, 2018 #60

    Crawf56

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    Huh? Person or Star Trek reference?
     

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