The two-place side-by-side Ercoupe first enter production just before World War II, with a 65 hp Continental engine.
The BT-14 was a later development of the 440 hp Wright-powered BT-9 basic trainer used by the United States Army Air Corps.
The most successful British fighter of WWI (1,294 “kills”), the Sopwith Camel was also one of the most heavily produced.
The Sch-2 was built in the Soviet Union, with production beginning in 1930.
The Piper PA-16 Clipper is not a common seaplane, but there are a few still out there flying regularly.
With as many as 12 seats, 900 hp, and amphibious capabilities, the S-38 was a very useful airplane.
Built in New York State by the Brunner-Winkle Aircraft Corporation, the Bird biplane began as another of those designs originally powered by a war surplus Curtiss OX-5 engine (scrapped from a Curtiss Jenny).
The four- to six-place Helio Courier was developed from the Helioplane proof-of-concept aircraft (which now resides in the Smithsonian Collection), and has a long list of unique “Short-field Take Off and Landing (S.T.O.L.)” features.
Designed by C. G. Taylor (who also developed the Taylorcraft line), the Cub series became the most recognized light airplanes in the United States.
Although the Martin B-26 suffered some serious problems in its stateside training programs, the airplane was one of the most successful U.S. bombers in the combat sector.