turbine 10 a is similar to fig1 with the exception that only a single turbine is used the engine 10 a includes a compressor 12 a recuperator 13 a combustion chamber 15 a turbine 16 a gearbox 18 and an electric generator 19 the engine 10 a communicates with an air source 20 upstream of compressor 12 the air is compressed and routed into recuperator 13 in recuperator 13 the compressed air is preheated by exhaust gases from turbine 16 and routed into the combustion chamber 15 fuel 22 is then added to the combustion chamber 15 and the mixture is combusted as described in greater detail below the products of combustion from the combustion chamber 15 are routed into turbine 16 the f a ratio is regulated i e the flow of fuel is regulated to produce either a preset turbine inlet temperature to turbine 16 or preset electrical power output from generator 19 turbine inlet temperature can range within practical limits between 1500 u00b0 f and 2000 u00b0 f work is extracted from the turbine to transfer power to both compressor 12 and the generator 19 with shaft power transferred through gearbox 18 the hot exhaust gases from turbine 16 are then conveyed through the recuperator 13 where heat is transferred by means of thermal convection and conduction to the air entering the combustion chamber 15 an optional heat capturing device 24 can be used to further capture the exhaust heat for productive commercial uses heat capturing device 24 can be used to supply hot water steam or other heated fluid to device 26 which uses the.