Semroc Saturn 1B build

Discussion in 'Scale' started by matthewdlaudato, Aug 23, 2019.

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  1. Aug 23, 2019 #1

    matthewdlaudato

    matthewdlaudato

    matthewdlaudato

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    Starting the build of my Semroc Saturn 1B. The Rocket was gifted to me by a fellow CMASS club member who was clearing out his build space. Challenging build ahead with lots of attention to detail required. Here goes nothing!

    IMG_3740.jpg
     
  2. Aug 23, 2019 #2

    Saluki

    Saluki

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  3. Aug 23, 2019 #3

    matthewdlaudato

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    IMG_3741.jpg
    Motor mounts in progress. Using the 4x-18mm option.
     
  4. Aug 23, 2019 #4

    matthewdlaudato

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    Glued all the mounts together. Used the 4x centering ring to ensure alignment, then clips to hold them in place while the glue sets.
    IMG_3743.jpg
     
  5. Aug 23, 2019 #5

    matthewdlaudato

    matthewdlaudato

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    Motor mounts glued together, stuffer tube and thrust ring assemblies complete.
    IMG_3744.jpg
     
  6. Aug 23, 2019 #6

    matthewdlaudato

    matthewdlaudato

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    Thrust ring glued to top of motor mount. Rubber band to keep it flush while glue sets.

    IMG_3745.jpg
     
  7. Aug 24, 2019 #7

    NJRick

    NJRick

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    looking good so far. I can't wait to follow your build! thanks for sharing!
     
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  8. Aug 24, 2019 #8

    matthewdlaudato

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    More work on the motor mount, stuffer tube attached. Also cut slits in 4 tank tubes.
    IMG_3746.jpg
     
    Last edited: Aug 24, 2019
  9. Aug 24, 2019 #9

    matthewdlaudato

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    First of the tank tubes in place, 7 more to go.

    IMG_3747.jpg
     
  10. Aug 25, 2019 #10

    matthewdlaudato

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    All tank tubes glued in place. Also started on the capsule, which is an independent build.

    IMG_3749.jpg
     
  11. Aug 25, 2019 #11

    DeltaVee

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    I downloaded the Estes 1/70th scale Apollo capsule instructions a while back. I was just curious... the part where you have to take the escape tower doweling and sand it's diameter down by drawing across a sandpaper sheet made my eyes bug out! Back in the early '70s I was 14 and a hobby store had the Ib and the V on the shelf. I jonesed over the Ib for a long time and I finally had the cash scrapped together (~ $10) for the kit. I had the Ib in hand and the guy behind the counter said he'd give me the V for the same price! After reading the capsule instructions all these years later I sure as heck am glad I took the V!!! There is no way I could have done a clean build of this kit back then... just didn't have that kind of patience.

    All that said, I cannot wait to see it fly! It's going to be fantastic!
     
    Last edited: Aug 25, 2019
  12. Aug 25, 2019 #12

    matthewdlaudato

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    Great story! I’m at the step where I have to shape the dowels. Fortunately I have a good digital caliper and no life, so it will be the highlight of my day!
     
  13. Aug 25, 2019 #13

    matthewdlaudato

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    IMG_3750.jpg

    Tail ring and motor mount cap installed. There are 8 balsa spacer strips glued to each of the tank tubes to allow tail ring to fit snugly.
     
  14. Aug 25, 2019 #14

    matthewdlaudato

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    Tank cover.
     
  15. Aug 25, 2019 #15

    prfesser

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    There is a tool that's used to bring dowels down to a particular size. It's a piece of hardened steel with a bunch of clean holes of decreasing size drilled through it. You push the dowel through a hole slightly smaller than the dowel, and the sharp edge of the hole shaves off some of the dowel. Repeat for smaller holes until the dowel is the desired size.

    A drill press, a set of suitable drills (number sizes probably most useful), and a piece of ordinary steel would likely do for just a few dowels. Use a cutting lubricant for cleaner holes.

    Best -- Terry
     
  16. Aug 25, 2019 #16

    matthewdlaudato

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    That’s a useful tool for sure. Though given that I’m unlikely to have much dowel thinning needs in the future, I’ll just sand away. I suppose I could 3D print one though...
     
  17. Aug 25, 2019 #17

    matthewdlaudato

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    IMG_3752.jpg
    Fairing supports installed, and fairing cut out.
     
  18. Aug 26, 2019 #18

    matthewdlaudato

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    Installing the fairing. I opted to do a ‘wrap and glue’ approach. It’s easier that way to get a snug fit.

    IMG_3753.jpg
     
  19. Aug 26, 2019 #19

    matthewdlaudato

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    Fairing attached. Still need to apply fillets.

    IMG_3754.jpg
     
  20. Aug 26, 2019 #20

    matthewdlaudato

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    IMG_3755.jpg

    Fillets on fairing mostly done, will touch up later. Centering rings installed on stuffer tube. Shock cord epoxied in place - I deviated from the instructions a bit and epoxied it flat to the parachute tube, and cut a small notch in the large centering ring to accommodate.
     
    Last edited: Aug 27, 2019
  21. Aug 26, 2019 #21

    mbeels

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    Looking good, there are a LOT of body tubes in there!
     
  22. Aug 26, 2019 #22

    matthewdlaudato

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    IMG_3756.jpg

    Two major subassemblies joined - parachute tube mounted to stuffer tube.
     
  23. Aug 27, 2019 #23

    Mugs914

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    Awesome thread, thanks for sharing! You're going to make me have to get one of these...
     
  24. Aug 27, 2019 #24

    matthewdlaudato

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    Thanks, and that’s an understatement! Much tube-age!
     
  25. Aug 27, 2019 #25

    NJRick

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    looks great so far! The fairings turned out great! Does the kit come with decals? Are you going with Apollo 7 (black tanks) or the white tank Skylab/ASTP? either way its going to look awesome!
     
  26. Aug 27, 2019 #26

    matthewdlaudato

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    I’m going with the recommendation in the instructions - which is Apollo 7 style, combination of black and white tanks and fins. Fairly complex paint job ahead.
     
  27. Aug 27, 2019 #27

    matthewdlaudato

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    Getting ready to glue the LEM shroud in place. This will complete the main body construction.
    IMG_3757.jpg
     
  28. Aug 27, 2019 #28

    kuririn

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    As masterNJ (AKA Mr Sat 1B) can tell you, pre painting the fuel tanks would have made painting a lot easier, on any scale Sat 1B.
    That was my only regret on my Estes 1/70 clone build.
    The Semroc version has many improvements.
    The specialty size bt-63 core spacer tube has been replaced with two spacer rings for perfect alignment, for example.
    Great work so far, enjoying your build!
    Laters.
     
  29. Aug 27, 2019 #29

    matthewdlaudato

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    IMG_3758.jpg

    LEM shroud attached. A bit more of a gap than I’d hoped for, will need to do some careful filling.
     
  30. Aug 27, 2019 #30

    neil_w

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    Looking really good so far.
     

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