Heraclio Alfaro designed and built aircraft but also engines. By 1930, his "Baby engine" with a weight less than 50 lbs. gave 24 hp at 3000 rpm.

“Alfaro with his Baby”

-His main activity was in the US and he had great success in Cleveland where he lived.

-His most significant engine work was the "gun" type engine through the "Aircraft Engine & Development Co. Inc." company in Boston, Massachusetts.

-This engine was built in the facilities of the Indian Motorcycle Co (Hendee), Springfield, Massachusetts.

"Drawing view of the Alfaro barrel or gun type"

"Alfaro schematic design"

-The principle was to place the cylinders parallel around the rotation shaft and the pistons and their connecting rods acting on an inclined plate (like the hydraulic Vickers Stratopower pumps).

"Alfaro cutaway drawing"

-We have an outside view of the engine, with its included accessories (the magneto seems to be a Vertex). At the rear an electric starter, a socket for carburetor, generator, etc.

"A real Alfaro"

-In another report we are told that Heraclio Alfaro studied at the Boston Institute of Technology, when he established in Cleveland in the Martin company.

-He practices a professorship at the Cleveland College of Western Reserve University until 1945 when a disease makes him return to Vitoria (Spain).

-We add a new picture of his barrel engine.

"Alfaro barrel type engine"

-It was built in the Aircraft & Engine Development Inc. in Boston with Heraclio Alfaro's own design.

-It was built with the collaboration of Indian Motorcycle as well.