Abstract: A compound exhaust system including two or more stages, preferably three, uses the force of exhaust gases traveling from a thrust generating source through the exhaust system to maximize thrust and minimize wasted energy consumption. In particular, the compound exhaust system for a thrust generating source comprises at least a first stage exhaust and a smaller, second stage exhaust. Various reflections of high speed traveling gases are provided and the resultant pressures induced during this travel supplement the thrust provided by the thrust generating source, which can be a jet engine. The invention also relates to a novel airframe that uses multiple engines having the inventive compound exhaust system.

Abstract: A propulsion system for a flying craft uses an air and water fuel source to provide propulsion thrust. The system includes two steam generating units, one attached directly to a compact turbine and the other connected to a compressor. The compressor compresses the steam from the latter steam generator, including excess steam from the turbine generator, and pumps it to a super-heated steam compression chamber. At the same time, the turbine generator powers another compressor to take in air from the atmosphere and pumps it into a super chilled compression chamber. After both the compressed super-heated steam and the compressed super chilled air have attained required pressure, volume and temperature, both gases are fed into an expansion chamber under appropriate control. The expansion chamber operates as a rocket booster and is equipped with an exhaust system made up of a main nozzle and several auxiliary thrust vectoring nozzles.