D-21

Drone. Year: 1968. Country: USA. Department of Defence Designation: D-21. Popular Name: GTD-21B.

Project 'Tagboard', Project 'Senior Bowl'. Mach 3.5 ramjet recoverable reconnaisance drone air-launched from back of A-12 or with booster rocket from B-52.

Manufacturer: Lockheed ADP.

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