AvioBlog - L'USAF aveva progettato di trasformare il drone spia supersonico D-21 Tagboard della Lockheed in una piattaforma d'attacco da Mach 3+. Il concetto avrebbe dato al servizio una penetrante risorsa d'attacco.
Lockheed D-21/M-21 - Wikipedia
Lockheed D-21/M-21 - Wikipedia
Lockheed D-21/M-21 - Wikipedia
Lockheed D-21B > National Museum of the United States Air Force™ > Display
The Time I Found a Formerly Top Secret D-21 Supersonic Drone in the Arizona Desert - The Aviationist
Loss of M
Lockheed D-21 Drone
Pin on AIRCRAFT
Lockheed D-21B > National Museum of the United States Air Force™ > Display
D-21 Projects Tagboard & Senior Bowl
THE TOP SECRET D-21, THE HIGH-SPEED, HIGH-ALTITUDE SPY DRONE AIR LAUNCHED FROM THE BACK OF A MACH 3 A-12 AIRCRAFT - The Aviation Geek Club
Lockheed D-21 #527 SR-71 Drone on Display at the China Avi… | Flickr
The Lockheed D-21, a Mach 3.3 Drone intended for launch from the SR-71 Blackbird : r/EngineeringPorn
SI VIS PACEM, PARA BELLUM: The "VORON" project: il Lockheed D-21 fu un aeromobile a pilotaggio remoto (APR) da ricognizione dell'USAF
D21 Drone | Sr 71 blackbird, Black bird, Sr 71
How Russia Got Its Very Own U.S. D-21 Stealth Drone | The National Interest
The Time I Found a Formerly Top Secret D-21 Supersonic Drone in the Arizona Desert - The Aviationist
Lockheed D-21B - Pima Air & Space
First Flight of M21 (SR-71) Carrying D-21 Drone)
Lockheed D-21/M-21 - Wikipedia
Lockheed D-21/M-21 - Wikipedia
