It differed significantly from other Aeronca planes by the use of radial engines, streamlining, and a cantilever low wing.

[1][2] Quite unlike other Aeronca designs, the Model L was a "cantilever" (no external struts for bracing) low-wing monoplane, that featured side-by-side seating in a completely enclosed cabin.

[1][2] The design reflected the greater attention being paid to aerodynamics in the period, including large wheel spats for the fixed undercarriage[1] and a Townend ring for the engine.

[3] The aircraft was of mixed-construction with a welded steel fuselage and wings with spruce spars and ribs, all covered with fabric.

[3] The Western Antique Aeroplane & Automobile Museum of Hood River, Oregon, has an airworthy Aeronica LC.