Designed for the launching of large quantities of space craft and mechanical units, and the launching of larger fighters and armor units. Large launch bays incorporate electromagnetic rail driven launch catapults, and vehicle lifting racks to move vehicles from storage platforms and vehicle delivery lifts into their proper launch positions. Large launch bays incorporate a series of magnetic servo and mechanical driven bay doors, and exterior and interior defenses which vary by application. Launch bay doors include forcefield systems to prevent atmosphere leakage in the event of bay door malfunction. Large launch bays usually focus upon the launching of fighter craft and shuttles.