Already in 1946, this famous aircraft brand that once made powerful Bugatti based engines, engaging them in different ways, presented a turbojet project, of a concept that today we would call Turbofan.

"Breguet patent"

-If we have a close look at the project, we notice that there occurs another combustion in the bypass duct.

-And the exit nozzle is variable through the moveable bulb. At that time it was the solution for optimal thrust for each flight condition.

-We recovered a photograph of a tandem compound engine, but with the second engine in a somewhat higher position. It has a total of 32 cylinders for being the union of two 16-cylinder engines.

"Double Breguet engine"

-Power increased to 820 CV at 2,100 rpm. It geared from 2 to 1.

From Appendix 9: In a French book from 1942 we found a warplane project of this brand where the aircraft was powered by a steam engine.

-The engine is a high pressure steam turbine. The steam was generated in a Vuia (see) type boiler that was capable of generating a large amount of steam almost instantly.

"Breguet steam fighter project"

-The mentioned power values are 1,200 hp with the turbine rotating at 30,000 rpm.

-For these results the boiler generates steam at 130 kg per cm2 and a quantity of 320 kg/Hr.

-The maker of this power is the boiler that is based on a Vuia one, with a large coil and a labyrinth of screens that require the warm air to flow several times up and down before leaving through the exhaust.

-In the center there is a vertical flame with the air and fuel inlet at the bottom.

-The steam flows in a closed circuit and is a mixture of water, oil and other inhibitory substances.

"Vuia boiler"