3 ms·
Ryan Model 147
- staunch 12y ago> The flights were given a cover story, describing the drones as high-altitude targets for surface-to-air missiles (SAMs), in case one of them came down in a public area. > The system injected chlorosulfonic acid into the engine tailpipe when the drone entered hostile territory, which created very tiny ice crystals, forming a transparent contrail.
- michael_h 12y agoSee also the Lockheed D-21: http://en.wikipedia.org/wiki/Lockheed_D-21 http://en.wikipedia.org/wiki/Lockheed_D-21 I don't know why, but the D-21 feels very creepy. Especially in person.