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Publication of GB649504ApublicationCriticalpatent/GB649504A/en
649,504. Jet propulsion. SOC. RATEAU, and ANXIONNAZ, R. Aug. 12, 1946, No. 23848. Convention date, Sept. 27, 1945. [Class 110(iii)] A gas turbine jet propulsion engine is surrounded by a propulsive duct having an air circulation distinct from that of the main engine and provided with heating means for producing extra thrust. The outer casing of the propulsive duct c' may be formed in halves f, f<SP>1</SP>, which can be slidingly operated to vary or close the inlet to and outlet from the duct. The discharge from the compressor a is divided between the combustion chamber b for the turbine e and a duct c provided with its own heating means.