Aerotech
The first rule set was simply known as Aerotech and later referred to as Aerotech 1 or AT1. The AT1 release was a large introduction box set that could be played as a complete independent game that co-exists in the Battletech universe, compatible with the regular ground game. The rule set introduced Aerospace Fighters (Space/air capable fighter craft), dropships and jumpships.
Some dropships, aircraft & aerospace fighters individual information was listed in out-of-print books - Technical Readout: 2750, Technical Readout: 3025, Technical Readout: 3026 & Dropships and Jumpships (Battletech) by Clare Hess (Paperback - April 1988). Expanded AT1 rules were also included in Roleplaying Guide book Mechwarrior 1st edition.
Due to balance problems, AT1 was replaced by an edition known as Battlespace.
Read more about this topic: Aero Tech