ERCO Ercoupe – Engineering and Research Corporation

Engineering and Research Corporation (ERCO)

The Ercoupe is one of aviation history's most distinctive light aircraft — designed from the outset to be safe, simple, and accessible to the average person. Developed by Engineering and Research Corporation (ERCO), the aircraft passed through multiple owners and manufacturers over three decades, each leaving their mark on the design.

ERCO Production Models

Model 310

The initial prototype, first flown in 1937, powered by a modest 37 hp engine. It established the twin-tail, tricycle-gear configuration that would define the Ercoupe lineage.

415-C

The first true production model, introduced in 1940, featuring a 65 hp Continental engine. Production was interrupted by World War II but resumed post-war with an upgraded 75 hp engine. The 415-C was marketed as "nearly foolproof" — a bold claim that reflected its interconnected aileron-rudder controls and absence of conventional rudder pedals.

415-D

Introduced in 1947, the 415-D raised the gross weight to 1,400 lbs and incorporated restricted elevator travel as a structural and handling refinement.

415-CD

A hybrid variant combining the 415-C's lighter 1,260 lb gross weight with selected structural improvements from the 415-D — offering a middle ground between the two generations.

415-E

Developed by Sanders Aviation using ERCO components, the 415-E introduced a split-elevator design and an 85 hp engine, improving performance and handling characteristics.

415-G (Club-Air)

The most luxurious ERCO variant, the 415-G added a small rear "kid's seat" and additional comfort and equipment features, positioning the Ercoupe as a family aircraft.

Derivatives and Rebranded Models

After ERCO ceased production, the design was acquired and continued by a succession of manufacturers, each refining the aircraft under a new name:

Forney F-1 / F-1A Aircoupe

Produced by the Forney Aircraft Company beginning in 1955, the F-1 and F-1A featured a 90 hp engine and improved avionics and equipment. Forney later transferred the design to Air Products.

Alon A-2 / A-2A Aircoupe

Manufactured by Alon Inc. from 1964, the A-2 series introduced a sliding bubble canopy for improved visibility and added conventional rudder pedals as a standard feature — a significant departure from the original ERCO philosophy.

Mooney M-10 Cadet

The final chapter in the Ercoupe lineage, the M-10 Cadet was produced by Mooney Aircraft and featured a redesigned single vertical tail, replacing the iconic twin-tail configuration that had defined the aircraft since 1937.

Military Variants

Small numbers of Ercoupes were evaluated for military applications during World War II:

• YO-55: Evaluated by the U.S. Army Air Force as a light observation aircraft.
• XPQ-13: Two aircraft were tested as radio-controlled target drones.

Neither variant entered large-scale military service, but the evaluations reflected the aircraft's perceived versatility during the wartime period.

Production History

The Ercoupe's production story is one of the most dramatic in light aviation — from pre-war optimism, through wartime interruption, to a post-war boom that briefly made it one of the best-selling aircraft in the world.

• Pre-War (1940–1941): 112 units produced, all with 65 hp engines.
• Post-War Peak (1946): An extraordinary 4,309 aircraft manufactured in a single year — a record for the type.
• Post-War Continuation (1947–1950): Production continued at declining rates through 1950.
• Total ERCO 415 Production: Estimates range from approximately 5,000 to 5,685 units, depending on how prototypes and variants are counted.
• Subsequent Manufacturers (1955–1970): Forney, Alon, and Mooney produced additional variants, bringing total production across all manufacturers close to 6,000 aircraft.

Ownership and Production Timeline

This article is part of the Online Aviation Library manufacturer documentation series. For available Ercoupe service manuals, parts catalogs, and technical documentation, browse our Ercoupe collection.