High Quality Content by WIKIPEDIA articles! The Radioplane BTT was a family of target drones produced by the Radioplane Company, and later Northrop. The series includes the following designations: * OQ-19 * KD2R Quail * MQM-33 * MQM-36 Shelduck * MQM-57 Falconer In the post-World War II period, Radioplane followed up the success of the OQ-2 target drone with another very successful series of piston-powered target drones, what would become known as the Basic Training Target (BTT) family (the BTT designation wasn't created until the 1980s, but is used here as a convenient way to resolve the tangle of designations). The BTTs remained in service for the rest of the 20th century.

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