Lockheed D-21 Drone - never released in X-Plane ? - General X-Plane Discussion - X-Plane.Org Forum
Lockheed D-21 — Wikipédia
The Lockheed D21 a 1960s reconnaissance drone. made during the time of film photography. Once completed its tour .the film was designed to be ejected from the craft which would self destructed.
Lockheed D21 Drone c/n 525 | A return visit to the Blackbird… | Flickr
Lockheed M21 mothership with D21 Drone | cyclops | Blipfoto