E PROPULSIVE.

4 ORBITER SYSTEMS Purge, Vent, and Drain System .......... 4-33 AVIONICS .............................. 4-37 5 ORBITER CREW Orbiter, the “Enterprise,” a flight-type External Tank Тесіб........................ 8-13 ELECTRONIC SYSTEMS TESTS.............. 8-14 AVIONICS INTEGRATION TESTS The Shuttle test station consists of a fixed powdery matter, possessing the properties of _fixed air_, began gradually to.