SCADAman's 4 Banger Launch Pad

Discussion in 'Ground Support' started by scadaman29325, Dec 21, 2019.

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  1. Dec 21, 2019 #1

    scadaman29325

    scadaman29325

    scadaman29325

    Catching up and tripping all over myself.

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    SCADAman's Launch Pad


    Inspiration
    Screenshot_20190818-194637_Edge.jpg


    My version
    20191221_134511.jpg



    The parts I used

    Folding sawhorse, handle on the side, not on top

    Screenshot_20191111-222416_Edge.jpg

    Parts list:
    4 @ 1 x 3 x 6" boards
    4 @ 2" EMT conduit 2 hole strap, not for rigid conduit, EMT conduit
    4 @ ⁵/16 x 4" Eyebolt w/nut
    4 @ ⁵/16 x 1"(?) Bolts (I used ½ long that was too short for 1x3 board)
    8 @ ⁵/16 T nut
    4 @ ⁵/16 nuts, plus nuts included with eyebolt, 8 total
    8 @ ⁵/16 flat washers
    12 @ ⁵/16 lock washers
    8 @ #6 x 1-½ wood screws

    The EMT conduit strap fit 2-¼ billard balls perfectly

    Total weight so far is about 20#. Still need to add drill chucks and ¾" x 36" PVC for launch rod storage.

    Parts
    20191221_112059.jpg


    Prototype
    20191221_111609.jpg





    Showing hole marking jig and 7/64 pilot holes and ⅜ holes

    20191221_111655.jpg


    Set T nuts

    20191221_111703.jpg
    Install strap with bolt and lock washer

    20191221_112143.jpg

    Assemble eyebolt with two nuts, lock washer in between, lock washer, and flat washer. Insert another flat washer between strap and wood.

    20191221_112328.jpg

    Add just nuts for depth

    20191221_112400.jpg
     
  2. Dec 21, 2019 #2

    scadaman29325

    scadaman29325

    scadaman29325

    Catching up and tripping all over myself.

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    Torque the down solid

    20191221_112453.jpg

    Fully assembled gimble

    20191221_112542.jpg



    Four ready to be attached to sawhorse

    20191221_114253.jpg

    Lining up hole jig with edge of assembly

    20191221_115219.jpg

    20191221_115225.jpg


    Pilot holes

    20191221_115235.jpg


    Aligned assembly a board width from edge and marked pilot holes for #6 wood screws through top of sawhorse into edge of board.

    20191221_133707.jpg

    Fully assembled

    20191221_134211.jpg



    Adjustable height legs

    20191221_134400.jpg

    Adjustable for a more comfortable height

    20191221_134511.jpg

    Still need to drill holes for drill chucks and acquire.
     
  3. Dec 21, 2019 #3

    BDB

    BDB

    BDB

    Absent Minded Professor

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    So you plan to drill holes in the billiard balls for mounting the drill chucks? Interesting idea for making an easy method to vary the launch rod angle in both x and y (or rho and theta, for that matter.)
     
  4. Dec 21, 2019 #4

    scadaman29325

    scadaman29325

    scadaman29325

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    Yes, unscrew the eyebolts, do your angle, tighten eyebolt.

    I want to protect the drill chucks from the gunpowder, I'm thinking of upside down flower pots with used engine spacer, breastplate and another used engine spacer, but I dont want a full toolbox of stuff to tote around. Still cyphering on this project.

    Anybody want to donate 4 drill chucks?

    Also working on a remote control 4 bang launch controller, 12v 7ah batt in a plastic ammo box with switches for each pad, power disconnect, continuity LED and tone... Got most of pieces now.
     
  5. Dec 22, 2019 #5

    Handeman

    Handeman

    Handeman

    Forum Supporter TRF Supporter

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    We use 1/2" plywood cut the the same size as 4" ceramic tile. Glue the tile to the plywood and use a 1/4" ceramic tile drill to drill the center hole. If you have some 1/2" ply laying around and some tile cement, they are less then $1 each. You can make up several extra to replace the ones that get broken or cracked. I've made a whole new set about every 5 years.
     
  6. Feb 4, 2020 #6

    scadaman29325

    scadaman29325

    scadaman29325

    Catching up and tripping all over myself.

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    Son in law fixed my balls, can't wait to get them back. 602431023.jpg
     
  7. Feb 4, 2020 #7

    ThreeJsDad

    ThreeJsDad

    ThreeJsDad

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    I really like the idea of using a billiard ball for the gimbal !!! That is brilliant. I am building a new MPR pad using a micro rail so this could be perfect for adjusting the angle. I can tap the bottom of the rail and epoxy a stud into the ball.
     
  8. Feb 4, 2020 #8

    scadaman29325

    scadaman29325

    scadaman29325

    Catching up and tripping all over myself.

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    Thank goodness you did not say that you liked MY IDEA. Of course it wasn't my idea, I stole it from a club down in Florida. Sorry, I forget the name. Those who do know, please post a credit to them here. Thanks!
     
    Last edited: Feb 5, 2020
  9. Feb 22, 2020 #9

    scadaman29325

    scadaman29325

    scadaman29325

    Catching up and tripping all over myself.

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    FINALLY got it done! Worked GREAT.
    Will be even better when I get done with the 4 Banger Launch Controller.

    Screenshot_20200222-161925_Gallery.jpg Screenshot_20200222-161839_Gallery.jpg
     

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