The Beechcraft Musketeer is a family of single-engined, low-wing, light aircraft that was produced by Beechcraft. The line includes the Model 19 Musketeer Sport, the Model 23 Musketeer, Custom and Sundowner, the Model 23-24 Musketeer Super III the retractable gear Model 24-R Sierra and the military CT-134 Musketeer. The Musketeer line was in production from model years 1963 to 1983, during which time a total of 4,366 were produced. The type certificate for the Musketeer family of aircraft has been owned by Hawker Beechcraft since March 26, 2007. Development Model 23 Musketeer and Custom The first of the line was the Model 23. It was introduced under the "Musketeer" name as a 1963 model at an initial price of $13,300 and was powered by a Lycoming O-320-D2B engine of . The next year this engine was replaced by the Continental IO-346-A engine of . This engine was not a success and was in turn replaced by the Lycoming O-360-A4J engine of starting with the B23 Musketeer Custom of 1968. In 1970 the C23 version was introduced also under the name "Musketeer Custom". In 1972 the C23 was renamed the "Sundowner". When properly equipped, the B23 and C23 are approved for limited aerobatics. A total of 2,331 Beechcraft 23s of all variants were manufactured by the time production was completed 20 years later in 1983. Model 19 Musketeer Sport The Beech 19 was introduced as a 1966 model year. Despite having a lower model number, it was a later variant and was a lower-powered trainer version of the Model 23. It lacked the 23's third side window and had a Lycoming O-320-E2C powerplant of . The Sport was introduced in 1966 with a standard price of $11,500. When properly equipped, the A19, B19, and M19 Sports are approved for limited aerobatics. The Model 19 was named the "Musketeer Sport" and a total of 922 were built over the 15 years of production which ended with the 1979 model year. Model 23-24 Musketeer Super III Along with the introduction of the lower-powered Model 19 in 1966, Beechcraft also introduced a higher-powered version of the Model 23 Musketeer and named it the Beechcraft 23–24 Musketeer Super III. This upgraded model had a Lycoming IO-360 fuel injected powerplant which produced , more than the standard Model 23 Musketeer of that year. This model initially sold for a price of $16,350 in 1966. In 1966