In 1919 he presents his toroidal engine in Barcelona.

"Carlos Esteve"

-It was able to give 100 CV with two liters of displacement. The used system is similar to that of the Beck and Dewandre engines.

"On a test bench"

-In the illustration above it has brake paddles and speed adjustment. The toroidal framework was fixed and double pistons oscillate inside and by means of gear it drove the propeller.

"Baradat-Esteve, abierto"

-We found a photograph of a taken-apart, toroidal type Baradat-Esteve engine, which was installed in an Austin-Seven for testing.

"Toroidal engine taken apart"

-In this case we said that this model is used in a car, but there was an adapted propeller version.

-However, leaks sentenced the engine.

"Baradat Esteve engine"

-Baradat and Esteve were two engineers from Barcelona, and came to the toroidal-engine idea after many tests and trials.

-Below we can see diagrams of a longitudinal and cross section of their engine.

"Diagram of the toroidal engine"

-Now we show an illustration of the piston movements inside the annular-toroidal cylinder.

"Piston movements"

-This engine was also tested at official Chalais-Meudon facilities in France.

From appendix 9: We obtained two more pictures that give us an inside view of this interesting, toroidal engine.

"Inside view of the engine"

-The mechanism that transforms an oscillating motion into a continuous circular motion, is shown below. (part)

"Oval track and follower bearings"

-According to the article where these photographs come from, the engine gave 100 hp at 16,000 rpm (?).