![The Lockheed D-21, a Mach 3.3 Drone intended for launch from the SR-71 Blackbird : r/EngineeringPorn The Lockheed D-21, a Mach 3.3 Drone intended for launch from the SR-71 Blackbird : r/EngineeringPorn](https://preview.redd.it/saw-this-next-to-an-sr-71-and-it-looked-like-this-had-no-v0-szgmfb1vegx91.jpg?auto=webp&s=893e016a56891195c5b08062841eb412e12b8c7a)
The Lockheed D-21, a Mach 3.3 Drone intended for launch from the SR-71 Blackbird : r/EngineeringPorn
SR-71 Blackbird and Lockheed D-21 Drone - WIP: All The Rest: Motorcycles, Aviation, Military, Sci-Fi, Figures - Model Cars Magazine Forum
![Flying Atop SR-71 Blackbird, Meet US' Top Secret Spy Drone That No One Knew Existed Until It Was Abandoned Flying Atop SR-71 Blackbird, Meet US' Top Secret Spy Drone That No One Knew Existed Until It Was Abandoned](https://eurasiantimes.com/wp-content/uploads/2022/03/Sr71_Blackbird-e1655034642232.jpg)
Flying Atop SR-71 Blackbird, Meet US' Top Secret Spy Drone That No One Knew Existed Until It Was Abandoned
![Flying Atop SR-71 Blackbird, Meet US' Top Secret Spy Drone That No One Knew Existed Until It Was Abandoned Flying Atop SR-71 Blackbird, Meet US' Top Secret Spy Drone That No One Knew Existed Until It Was Abandoned](https://eurasiantimes.com/wp-content/uploads/2022/06/US-Supersonic-Ramjet-Powered-Spy-Drone-D-21.jpg)
Flying Atop SR-71 Blackbird, Meet US' Top Secret Spy Drone That No One Knew Existed Until It Was Abandoned
![The story of the D-21 Drone and project Senior Bowl, the Most Secret Program ever developed by the famed Lockheed Skunk Works - The Aviation Geek Club The story of the D-21 Drone and project Senior Bowl, the Most Secret Program ever developed by the famed Lockheed Skunk Works - The Aviation Geek Club](https://theaviationgeekclub.com/wp-content/uploads/2022/01/Senior-Bowl-1280x720.jpg)
The story of the D-21 Drone and project Senior Bowl, the Most Secret Program ever developed by the famed Lockheed Skunk Works - The Aviation Geek Club
![File:Lockheed M-21 mothership & D-21 drone, Seattle Museum Of Flight, Washington (1).jpg - Wikimedia Commons File:Lockheed M-21 mothership & D-21 drone, Seattle Museum Of Flight, Washington (1).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/6/6d/Lockheed_M-21_mothership_%26_D-21_drone%2C_Seattle_Museum_Of_Flight%2C_Washington_%281%29.jpg)
File:Lockheed M-21 mothership & D-21 drone, Seattle Museum Of Flight, Washington (1).jpg - Wikimedia Commons
![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 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](https://theaviationgeekclub.com/wp-content/uploads/2018/02/D-21-A-12.jpg)