In 1937, Berliner purchased 50 acres of land in Riverdale, MD, near the College Park Airport, and built the large ERCO factory and airstrip. One of ERCO's most significant achievements was the development of the Ercoupe aircraft.The Ercoupe contained many innovative design features that produced an aircraft that was safe, easy to fly, and certified by the Civil Aeronautics Administration (CAA) as "characteristically incapable of spinning."
The aircraft was designed by Fred E. Weick, a noted aeronautical engineer, who before coming to ERCO in 1936, worked for the National Advisory Committee for Aeronautics (NACA). The first experimental model of the Ercoupe was test flown at College Park airport in 1937.
During World War II, the ERCO factory produced several products under contract with the U.S. Government, including gun turrets. ERCO earned an "E" award for excellence in meeting manufacturing goals in its war contracts and employed hundreds of local residents in its wartime efforts.
The ERCO collection of the College Park Aviation Museum is part of the Maryland Digital Cultural Heritage project, a collaborative, statewide digitization program headquartered at the Enoch Pratt Free Library/State Library Resource Center in Baltimore.
Take a look at http://collections.mdch.org/cdm/landingpage/collection/erco.