Avionics Bay Design: Sleds, Switches, Batteries, and Wiring That Survive Boost

A dual-deploy avionics bay is a small pressure vessel, a switch panel, and a wiring harness that has to survive more acceleration than a dropped phone. Most “altimeter problems” I have watched at the range were bay problems: a 9V that walked out of a clip, a screw switch that backed open at rail exit, a bulkhead that leaked the drogue charge into the computer, or two charge wells that shared a path.

This is the build guide. The flight sequence is in the free dual-deployment article. Charge mass is in black-powder sizing. Pins and vents are in shear pins and vents. Pick the altimeter from the L1 altimeter guide or the Quasar vs Blue Raven comparison, then build the bay to that manual.