Tag: A-12

The SR-71 Blackbird’s Predecessor Created “Plasma Stealth” By Burning Cesium-Laced Fuel

The A-12 – the predecessor to the U.S. Air Force’s iconic SR-71 Blackbird – was extremely high- and fast-flying, but also incorporated then-state-of-the-art features to reduce its radar cross-section. These included a combination of a stealthy overall shape and radar-evading structures, as well as the use of composites in its construction and the application of radar absorbing materials to its skin. A far less known, but still a key component of the Skunk Works plan to make the A-12 harder to spot on radar involved a cesium-laced fuel additive to cut the radar signature of the plane’s massive engine exhausts and afterburner plumes by creating an ionizing cloud behind the aircraft to help conceal its entire rear aspect from radar waves.