Also named "kaydet," the Stearman Model 75, introduced newly under Boeng after 1934, is a conventional biplane with a long history and is considered a darling by aviation aficionados.
Although it was thought practically antique by its rugged construction, from its fabric-covered wooden wings, and single-leg landig gear, it was practical, and maneuverable---ideal for training novice pilots in the U.S. Army Air Corps and U.S. Navy. It flew with one of the earliest air-cooled radial engine, which were most often than not uncowled and easy to repair. In addition, the cockpit could fit two, usually a student and teacher, and was resiliently sturdy.
After WWII, it remained an ideal trainer, and sold for military and civilian use all over the world---well into the 1990s. Because of their slow and sturdy, low-level flying capacities, Stearmans are extremely useful in agriculture for drop dusting and spraying, still to this day. Because of their nostalgic quality, they're also popular for airshow performances.