Fin jigs

Discussion in 'Low Power Rocketry (LPR)' started by scott johnson, Aug 21, 2018.

  1. Aug 21, 2018 #1

    scott johnson

    scott johnson

    scott johnson

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    Here is my fin jig for the BT-60 body tube. I made it from 1" aluminum angle and a scrap piece of 3/8" aluminum plate. The plate is slotted for the angle which was pressed in and secured with Loctite EA 445 epoxy. The angle pieces were milled to give the proper height to the tube centerline, minus 1/16". It works great for 1/8" fins......if I build something smaller I will have to shim the tube and fins to get them on the CL, but I built it with Big Bertha on the mind. I also made some out of 1" aluminum angle, slotted 3/32", 1/8", 3/16" and 1/4" for doing one fin at a time.

     
  2. Aug 21, 2018 #2

    scott johnson

    scott johnson

    scott johnson

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    It is offset so it can be clamped to the edge of a table which allows clearance for the bottom fin.
     
  3. Aug 21, 2018 #3

    lakeroadster

    lakeroadster

    lakeroadster

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    Nicely done...

    Purpose Built Fixturing: I built a jig out of wood for my X-Wing. it's 40 degree fins and BT-50 body tube made for close constraints.
     

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