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The work reported in this paper has been conducted by General Electric Company and Sundstrand Corporation as part of a contract sponsored by the USAF, Wright Laboratories, and WPAFB under contract no. F33615-90-C-2052. The objective of this contract is to prove the feasibility of an integral starter/generator (IS/G) through the preliminary design stage and demonstrate the starter/generator technology in the externally-mounted version (EIS/G) using switched reluctance (SR) machine technology. This paper reports on the detailed design and analysis of the EIS/G. The analysis and design encompassed definition of requirements and constraints, electromagnetic design, thermal analysis, mechanical stress and fit analysis, bearing and critical speed analysis, and mechanical layout and packaging.