Herrrmann Engineering Co. was based in Glendale, California and was founded by Karl Herrmann.

Through the "Aircraft Engine Historical Society" (AEHS) we obtained a real photograph of the Herrmann barrel-type motor.

“The Herrmann barrel-type engine”

“Herrmann engine details”

“Complete engine, latest versions”

-Other drafting of the main text from 2008-9, of Herrmann in Glendale, California. There was the X-375 engine from which we have the following data: It is a "barrel" engine, manufactured by "Studebaker" in South-Bend, Indiana.

“Herrmann”

-It had twelve cylinders with 70.8 mm bore and 95.2 mm stroke, and a total displacement of 4.5 liters.

-The pistons were attached two by two and had rollers and skids at their bases that were applied on the central oscillating plate. The valve assemblies are at the engine's ends.

“X-375”

-This engine that was planned for 150 hp, had problems similar to the Fairchild Caminez due to the inertia and piston tracking on the plate or cam. A derivative of this engine is possibly the Dyna-Cam.

-It was built by Studebaker with the effort of K.L. Herrmann, who used the patent that he bought from the Blazer brothers together with his own developments, to make this revolver or barrel-type engine.

-In the main text are provided internal schematics

“Herrmann engine”

-It is from the year 1937, and it was calculated from 140 to 150 hp at 1,900 rpm.

From Appendix 11: New information about Karl Herrmann has arrived. The Blazer brothers, who were two engineers working for Studebaker (see), had designed an axial motor. By then, Karl Herrmann was Studebaker's chief engineer. In 1916 the Blazers sold their patent to Karl Herrmann, who continued developing the concept.

-In 1941, Herrmann got his own patent for a 6-cylinder engine with double-acting pistons and 12 combustion chambers.

-In 1961, Herrmann sold his patents to Edward Palmer, who established the "Dyna-Cam Engine Corp".