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Integrate Piston Cup Assembly

  1. Screw diaphragm into Cup with four grub screws using a 7/64 hex wrench

  2.  Integrate the T-fitting into the piston's inlet port (top side) with 2x plugs and 2x FireBolts, a pair on each side. Make sure the T bar is horizontal with respect to the end plate.

    1. Insert detailed BP procedure here

  3. Screw the Payload bulkhead into the top of the piston using 4x 1/4-28 bolts that are 3/8ths inches long. You need a 3/16ths hex key.

  4. Insert Avionics Bay

    1. Insert detailed AV Bay procedure here

  5. Put the coupler over the piston and screw in the lower bulkhead. The switchband should be nearest to the Payload bulkhead.

    1. The milled face should be internal to the Avionics Bay.

  6. Put a nut on one side of the piston rod and screw the piston fully into the diaphragm.

  7. Put a nut on the other side of the diaphragm and counter torque the nuts.

  8. Adjust the piston height so that the piston-cup assembly with bulkheads reach a total of 28 inches tall. It should actually be slightly less, but this is adjusted by trial and error later on in integration.

  9. Put the mission package tube on over the assembly. “Struggle with clocking” - Jakob, 11:20am

  10. Screw in four ½” 8-32 screws.

  11. Screw in the nosecone with the right clocking using four 8-32 screws.

  12. Put the mission package assembly on the fin can and secure with 3x 6-32 shear pins. For the Pathfinder vehicle, you will need to skip every other hole.


Notes from integration:

  • Need to turn down upper counter torqued nut on piston because it otherwise doesn’t screw far enough in?

  • We would rather have the piston cup assembly be too short than too long because we can only compress it so much when we do the last step.

  • Consider switching to words like "fore and aft" instead of "up and down"

  • Purchase 1/4-28" bolts that 3/4" long.

  • Cut the mission package to be 25" long.

  • Avionics bulkhead outer rim should be shaved down a little bit–does not fit with mission package tube.

  • Get torque specs and think about them.

  • Add notes about the dental tool.

  • Think about access to diaphragm area for screwing lines when doing mass saving cuts

  • Think about standardizing clocking marks and directional marks 

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