In high altitude aircraft, such as Unmanned Air Vehicles (UAV's), secondary power systems have a limited potential for increasing electrical output. Employing the AE3007H platform as a test bed, American Technology & Services (ATS) proposes to evaluate several novel concepts in order to: - Develop increased power with minimum impact on the current design, - Provide in-flight restart capability at altitudes greater than 45,000 feet. Concurrently, ATS is proposing to evaluate the Affordability and Producibility of the alternatives, such that the final solution is technically sound and financially justifiable. Our proposed approach has been endorsed by Rolls-Royce Allison (p. 19), with whom ATS has a Non-disclosure agreement in place. The detailed design, component fabrication, and system demonstration and testing would be a part of a sequel Phase II SBIR project.