A program is proposed to evaluate the feasibility of using low-cost microturbines to meet the U.S. Army future requirements for small, lightweight engines (less than 10 kW power) that operate on heavy fuel and achieve very high power per cubic foot of engine volume. The program will accomplish this evaluation in two tasks; the basic program using today's technology, and an option that will evaluate innovative technology advances. In the basic program today's state-of-the-art microturbine capability will be demonstrated through both analysis and test. A very simple, low-cost turbojet developed for the model aircraft industry will be modified into a shaft engine and tested to determine it's capabilities, including it's power density. Along with the test evaluation, analysis will be conducted to provide an engineering understanding of the engine demonstration. Analysis will include performance, thermal and stress analysis, sealing/leakage evaluation, dynamic behavior, and life projections. In the program option a microturbine in the power range of interest will be conceptually designed using advanced technology features and innovative component arrangements to maximize the volumetric power density. This program will provide the U.S. Army with an engineering evaluation of the suitability of an important class of engines (microturbines less than 10 kW) for use in air/ground unmanned vehicles and to supply power needs for the Army footsoldier. Commercially, this will provide a heavy-fuel, lightweight alternative to small gasoline engines for smooth and safe aero, marine, business, or home application.
