This company is of Fred Weinberg of Detroit, Michigan. Established in 1911.

This is the name of an experimental engine designed and built by Fred Weinberg of Detroit, Michigan.

-It is an air-cooled, two-cylinder rotary engine with a displacement of 197 cu. in..

-The ignition occurred simultaneously with each revolution It was two-stroke with an independent exhaust valve.

-The valves had no springs, remaining seated thanks to the centrifugal force.

Fred Weinberg also designed the Albatross and Detroit Aero engines.