Motor presented to the “1930 Arturo Elizalde Award”. It did not qualify for the top four, the eminent engineer and Colonel Emilio Herrera being part of the jury.

-However, for the author this engine is very interesting. It was baptized with the name "Chumba" and had six inline cylinders. It was an air-cooled engine that ran on diesel.

“Chumba side view”

-It was a two-stroke diesel with a fan at the rear to cool the cylinders with vertical fins so each one wore a kind of hat.

-To facilitate lubrication, which was not pressured but by splash inside the crankcase. It had ball bearings, even in the piston bolts, which seems exaggerated.