Bruce's Scale Sputnik

Discussion in 'Oddrocs' started by BruceS, Mar 11, 2020.

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  1. Mar 11, 2020 #1

    BruceS

    BruceS

    BruceS

    Would you like a jelly baby?

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    Ok, as teased before, I am answering a challenge to upscale my 4" Splatnik. This will be a scratch built 12" diameter (roughly 1/2 sized) model of Sputnik 1. 3 engine cluster, streamer recovery.
    I'm going to post as I go. Step 1: Gather the parts. IMG_20200310_205047.jpg
     
  2. Mar 11, 2020 #2

    Bat-mite

    Bat-mite

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    Looks fun!
     
  3. Mar 11, 2020 #3

    memcbride

    memcbride

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    Looking forward to this build thread
     
  4. Mar 11, 2020 #4

    Nytrunner

    Nytrunner

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    This would be really good in the OddRoc forum
     
  5. Mar 11, 2020 #5

    neil_w

    neil_w

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    Yes, anywhere but the watering hole. Suggest sending a PM to Chuck to move it.
     
  6. Mar 12, 2020 #6

    BruceS

    BruceS

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    Would you like a jelly baby?

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    IMG_20200311_162247.jpg motor mount built. IMG_20200311_213049.jpg
    Core hole drilled.
    Mount is sized for D12-3 motors. Will use adapters for first flight on A8-3.
    Next is the bulkhead for the "nose".
     
  7. Mar 12, 2020 #7

    PXR5

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    Looking good :)
     
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  8. Mar 12, 2020 #8

    BABAR

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    0506C073-05B2-4D7B-89C3-F168248C5B1A.jpeg You know, you could kind of do something similar with a styrofoam wig head

    Paint it grey, with alien eyes......
     
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  9. Mar 12, 2020 #9

    BruceS

    BruceS

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    Done
     
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  10. Mar 15, 2020 #10

    BruceS

    BruceS

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    Would you like a jelly baby?

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    IMG_20200314_214123_1.jpg IMG_20200314_214104.jpg
    "Nose cone" ready. Motor core ready
     
  11. Mar 15, 2020 #11

    SCooke123

    SCooke123

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    Pretty cool - I'll be following this one.......
     
  12. Mar 15, 2020 #12

    BruceS

    BruceS

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    Next: install 3/16" launch lugs and mount the 48" long antennas. IMG_20200315_110944.jpg
     
  13. Mar 16, 2020 #13

    jadebox

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    Are you not using a parachute?

    Our Akavish rockets were a similar design and size. Though, with eight legs and fur, they were a little heavier and more draggy.

    When the parachute failed to deploy properly, the rocket landed pretty hard. Usually one of more of the "legs" would break or detach from the core of rocket when it came down head-first.

    We mostly solved that problem by using a larger motor so there was time enough for the delay to eject the parachute. We ended up flying it on G motors with the shortest delay possible.
     
  14. Mar 16, 2020 #14

    BruceS

    BruceS

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    Planning on using streamers.
     
  15. Mar 21, 2020 #15

    BruceS

    BruceS

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    Tested glues to bond vinyl tubing to styrofoam. Titebond polyurethane won. IMG_20200320_201359.jpg IMG_20200320_201437.jpg
     
  16. Mar 26, 2020 at 9:24 PM #16

    BruceS

    BruceS

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    Would you like a jelly baby?

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    Covering the attachment points for the antennae with rocketpoxy. Next up streamers and shock cord.
     

    Attached Files:

  17. Mar 26, 2020 at 9:47 PM #17

    jadebox

    jadebox

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    That photo looks like it needs a NSFW tag. :)
     
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  18. Mar 26, 2020 at 11:34 PM #18

    BBowmaster

    BBowmaster

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    I didn’t want to say anything.
     
  19. Mar 27, 2020 at 12:21 AM #19

    BruceS

    BruceS

    BruceS

    Would you like a jelly baby?

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    Hmm, maybe these are a bit better. IMG_20200326_201945.jpg IMG_20200326_201942.jpg
     

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