The Vultee Aircraft Corp. BT-13 “Valiant” was a single-engine, tandem-seat trainer produced for the U.S. Army Air Corps, U.S. Navy and foreign allies prior to and during World War II. The aircraft was selected and produced as a primary and follow-on intermediary trainer due to its ruggedness, forgiving flight characteristics and stability. Most of the pilots produced in the early years of World War II conducted initial training, or Basic Training, hence the BT name, on the BT-13.
The Valiant was an all-metal, low-wing mono-plane with fixed main landing gear and a tail-wheel. The aircraft was considered ‘overpowered’ for the day with its 450 horsepower nine-cylinder, single-row, air-cooled engine. Since the pilot sat relatively close to this massive engine and felt the power transfer through the engine mounts and aircraft frame, it received the unflattering nickname, “Vultee Vibrator.”