Rocket Cradle Designs?

Discussion in 'Beginners & Educational Programs' started by JCRL, Oct 9, 2019.

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  1. Oct 9, 2019 #1

    JCRL

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    I see a lot of pictures on the forum of larger rockets in what I would call a "cradle" built from PVC pipes and foam to hold the rocket flat during construction. I could study the pictures and recreate it, but before I do that, does anyone have plans readily available?
     
  2. Oct 9, 2019 #2

    Nytrunner

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    Don't think I've ever seen a 'plan' for them. They just kinda slip together

    2 crosses, 4 elbows, 4 caps (optional), lengths of pipe to suit your rocket.
    Don't glue everything, so you can take them apart or change them for different rockets
     
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  3. Oct 9, 2019 #3

    JCRL

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  4. Oct 10, 2019 #4

    cwbullet

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    Is anyone interested in a 3D Printed design?
     
  5. Oct 10, 2019 #5

    Billys2001

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    Yes, I been thinking about doing one but it hasn't bubbled up on my list of things.
     
  6. Oct 10, 2019 #6

    Rainmaker

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    I'm curious what you could come up with and what size it could accomodate.
     
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  7. Oct 10, 2019 #7

    cwbullet

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    What size do you want? I can probably come up with a design to support up to 4 inches.
     
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  8. Oct 10, 2019 #8

    Rainmaker

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    That would fit 80% of what I build.
     
  9. Oct 10, 2019 #9

    Billys2001

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    If able something parametric that can support different sizes. Most of what I do is LPR/MPR so BT-50 up to 2.6 inches. Also if it folded flat for storage when not in use would be good.
     
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  10. Oct 11, 2019 #10

    cwbullet

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    I will look at what is out there and either modify or make something new.
     
  11. Oct 19, 2019 #11

    Alan R

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    I just updated mine today. I added the foam stuff. The pretty green foam stuff is kiddie-costume nunchucks from the dollar store. $1 total for all that foam padding.
    4x 90-degree bends, 2x cross pieces, and about 4' of 1/2" pvc ... just a note I remember i had to go to the plumbing supply store to get the 4-way cross pieces. Lowes did not carry those.
    All in all it will cost about $5.
    Here's the obligatory picture so you can build it yourself. Mineis 3" pieces on the bottom, 4" pieces on the top and 12" pieces lengthwise. IMG_20191018_183012174.jpg
     
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  12. Oct 19, 2019 #12

    JoeTekcor

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    I’ll add that I don’t recommend using pipe insulation, the kind that has the adhesive that sticks the sides together. The adhesive gets gummy and will get all over your rockets. Find something like the pic above or pool noodles.
     
  13. Nov 5, 2019 #13

    scadaman29325

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    20191105_181410.jpg This guy had a pretty good idea.
     

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  14. Nov 6, 2019 #14

    Donnager

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    And if he has an issue, a convenient box for the remains.
     
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  15. Nov 8, 2019 #15

    SDramstad

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    I use tee's instead of elbows so I can add sections to it
     
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  16. Nov 20, 2019 #16

    Funkworks

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    If I wrote it down, my plan would look like:

    Find:
    - 2 feet of 3/4" PVC piping
    - 8 inches of foam pipe insulator (sold in 3 ft length in my local stores).
    - 12 caps for 3/4" pipes.

    Procedure:
    Step 1: Cut piping into 12 pieces, each 2-inch long. ("I's") and sand.
    Step 2: Fit or glue 8 "I's" to the 8 ending of 2 "X's".
    Step 3: Fit or glue 4 "T's" to neighbouring ends of the 2 "X's".
    Step 4: Fit or glue the 4 remaining "I's" to the "T's".
    Step 5: Fit a cap wherever you can.
    Step 6: Wrap the 4 cradle arms in foam (insulator foam is found in same store aisle as piping).
    Step 7: Done!
     
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  17. Nov 20, 2019 #17

    cwbullet

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    I have seen that before. Great recycling idea.
     
  18. Nov 26, 2019 #18

    JStarStar

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    For small-to-medium LPR models, I've cut V-notches in the sides of a Tim Horton TimBits box and it works fine.

    That reminds me, I better go buy a box of TimBits!
     
    Last edited: Nov 26, 2019
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  19. Nov 28, 2019 #19

    lcorinth

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    I've done that. Especially helpful when teaching rocket camp. Each kid got a shoe box to keep their parts in, and it could be used as a cradle during construction.
     
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  20. Nov 28, 2019 #20

    Nathan

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    I've made a bunch of PVC stands over the years. I don't have any plans but here are a few pictures . . .
    [​IMG]
    [​IMG]
    [​IMG]
     
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