Notes

  1. They do fins body tubes and nosecones

  2. For nosecone - model in SOLIDWORKS, follow a parabolic profile, Haack series

    1. They will be below MACH 1 (Haack is best for that)

    2. they’re making 6 inch this year

    3. when they go through open rocket, figure out what speed and then report to chart

      image.png

    4. they’re planning on flying 10,000 feet

    5. 3D printed mold

    6. Only male section of the mold (had to scrape plastic out)

    7. didn’t vacuum bag the nosecone

    8. Fiberglass

    9. didn't use sheets, used sleeves

    10. https://sollercompositesllc.com/braided-fiberglass-biaxial-sleeves/

    11. sleeve went over 3D printed mold

    12. went with 6-inch light and 3-inch light

    13. sand down the overlap to proper shape

    14. chop off for around the tip

    15. threaded

    16. doesn’t remember using mold release, its a good idea

    17. when going for layup, cant just lay successive sleeve on top of each other

    18. after applying epoxy and going to next sleeve, will get caught

    19. epoxy will hinder from going all the way to the bottom

    20. made a cylinder slightly bigger than nose, put the sleeve on cylinder, and then slide the sleeve off cylinder on top of nose

  3. For tube

    1. No vacuum tubing
    2. mandrel worked out really well
    3. separate aluminum mandrel for main tube???
    4. using super lube, works perfectly, too well even
    5. https://www.amazon.ca/Super-Lube-41160-Synthetic-Multi-Purpose/dp/B0083R1FME?crid=2RSHCXBGQ9CPE&dib=eyJ2IjoiMSJ9.Pmbu4SWCo29ZvUHFkAEo_uxKfAcwZUXTqddHWdj4XNrcC2Z2rhB3rBbnA6dwxzAkGiZI9jYZxKZfdwtafSUx773oakd0oP7TPUw4b9fr_kJN_vKQq5PCk6WQhbt_lc66m3yXvK5NIizp5wYOGbPOJA9iKdB0wCIxy064tbywYYzQckdZ0ItYkeTFl-Piz6rmpuWipK93Fym7qMO8LEwq3hArXxDMFMo8BSKlR5y1NCftJIMIp0oS80ugju2yxA5W9eR83fyvqkPJgCK587chxIoqJCIYecAXWBR_MiX7-qdUTP23SnJ_YrbDH1L6SPyiyDoI1pCmse7rYIK6X2A1GOkT8aipnVcPHZ6gPFGZ99BbM09BG9Y40OoK5tYEnaAqgCrqMcODBy608eMb_Vy-RAKpf39G_2b1JP9RjYh17TORmNb4MBhelV7I4bhtdCKc.Idq9Sl0PUNfGX-RuJ8dFQueNm-PRp1cXeiwYDSo9D9M&dib_tag=se&keywords=super%2Blube&qid=1739490279&sprefix=super%2Blu%2Caps%2C307&sr=8-7&th=1
    6. cut fabric to tube dimensions, no sleeves
    7. all fiber glass except motor tube
    8. motor tube is cover in carbon
    9. HOW MANY LAYERS? FOR NOSECONE - 8 LAYERS (sweet spot for them for 10th of an inch thickness)
    10. FOR BODY TUBE - 8 AS WELL
    11. FOR MOTOR TUBE - 8 AS WELL
    12. no vacuum bags except for fins
    13. LINKS FOR FIBERS
      1. https://compositeenvisions.com/
      2. https://www.fibreglast.com/

  4. They get stuff machined for them at school (PETER)

  5. FIN

    1. 22 LAYERS FOR 5.5mm THICKNESS
    2. they got a plate that they lay up on
    3. gotta have 2 extras

  6. Epoxy - Aeropoxy

    1. https://www.aircraftspruce.ca/menus/cm/epoxy_aeropoxy.html
    2. pr3022 resin
    3. ph3665 hardener used in the past
    4. numbers designate working time
    5. important to have 65 because fin plate takes a long time

  7. Weave patterns

    1. last year did 45 degree bi-axial weave pattern
    2. DO NOT MIX WEAVES with each others
    3. causes air bubbles
    4. 2x2 twill weave is what they do (bottom left) (for carbon fiber)
    5. one more - uniaxial - CMCS 220 - good for 1D loading
    6. applies for fiber glass too
    7. regular/normal weave (CMCP 600) (for fiber glass)

    image.png

  8. they do layups on glass panel

  9. scrape off excess epoxy, apply MEK

  10. apply mold release

  11. Use wax or spray or pour on mold release

  12. layup of fins is tip to tip, in in-between sections of fins

  13. -20 to -25 inHg for vacuum

  14. aluminum mandrel gotten from: couldn’t find it but standard apparently easy to find

  15. Coupler length is the same as diameter of the rocket

  16. fiber to epoxy ratio is important

  17. trying to match 1:1 for unbagged (weight)

  18. General layup material list for tubes (3D printed including) (in order of application):

    1. lube
    2. mylar plastic
    3. first layer of epoxy on mylar
    4. first layer of fabric
    5. alternate epoxy and fabric
    6. peel ply