The avionics bay houses the electronics components for Icarus, a liquid bipropellant rocket currently in construction and testing by the Boston University Rocket Propulsion Group. 

Icarus is a 7-inch diameter rocket that uses nitrous oxide and isopropyl alcohol. The rocket engine, Iron Lotus, outputs 2500 lbs of thrust over a burn time of about 5 seconds and has a specific impulse of about 211 seconds. The rocket's apogee is predicted to be about 30,000 ft. 

The avionics bay is designed to interface with the ox-dome, which includes six 3/8-16 Helicoil inserts. It houses the flight computer, a battery, a radio, a GPS, and a pegboard.

The Daedalus flight computer is mounted on a removable tray that slides into 3-D printed linear rails, allowing quick accessibility and removability.  The battery is mounted on and strapped to 3-D printed battery holders. 

The electronics are mounted between two circular aluminum plates forming the avionics bay. This bay is 4 inches above the ox dome. In addition, an aluminum ring is mounted on the ox dome. In the first iteration, the plates were mounted and secured on six 3/8-16 rods that traveled from the ox dome through the avionics bay.  I used CNC machining and a waterjet to create the aluminum plates. The fuselage is tank stock that is cut in half to form two half-shells. The shells are load-bearing and have thru-holes, allowing them to be fastened to the subsystem plates. One fuselage panel is removable, allowing access to the avionics bay components. Furthermore, the load-bearing fuselage helps the subsystem better resist torsion caused by moments on the rocket fins.