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  • CADed a chassis for the payload
    • 7.5x7x8' Cube-ish
    • 2 layers split by a divider plate
    • Balloon's 4 point harness attached to base plate, no top plate. Initially planned on mounting to a roof fixture, but changed to floor fixture because: a) it'd be redundant to have both a roof for the chassis and a roof of foam, and b) it'd make it hard to move things around and physically insert things with a roof in the way.
  • Improvements to be made 
    • Fix up timing next time and make sure to properly train everyone in CADing so a last minute grind doesn't need to be done again, and so that we have time to test, and play around with the physical model prior to launch
    • Get a better visual idea of how to budget space (i.e. allocating better clearance)
    • Account for battery drain during setup
    • Determine heat emitted of active components
  • Important Factors
    • Dedicating enough space and surface area for all components. This determined the size of the cube and how many layers
    • The size of the biggest components, including the spectrometer and the muon detector; primary determiners in layout and setup
    • Weight - comply with regulations, minimize the size of spectrometer as it was being designed and built. We considered changing the 
    • Weight distribution - minimize spin as HAB ascended
    • Screw embedment length - impacted our decision for wall thickness
    • Thermodynamic regulation - foam was used to insulate the payload from high altitude temperatures. We concluded thermal emission from batteries weren't a problem. 
      • NOTE for later - Why were the batteries' thermal emissions not a problem anymore
    • Sensor Accessibility - some components needed to have access to the outside. The Go-Pro was integrated completely outside of the box. The spectrometer was part inside so sensitive electronics could be safe, and we led a fiber optic cable to the outside of the chassis by cutting a tiny hole in the foam.
  • Other Ideas
    • Solid wall box
    • 3 Layers
  • Cut Foam for temperature insulation
    • Everything was measured precisely and cut out in accordance



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