« Responder #500 em: Dezembro 15, 2014, 03:50:55 pm »
Three generations of aircraft developed by the Skunk Works, the Lockheed and Lockheed Martin Advanced Development Projects group in Palmdale, California, are shown in this photo from July 2000. At the top, one of the five full-scale development F-117 Nighthawks (Air Force serial number 79-0782), which was still being flown at at the time, is being towed back to the Air Force test squadron, also located at this site. At the bottom, an SR-71 is towed back to the hangar. This aircraft (Air Force serial number 61-7962) was one of the Blackbirds kept in storage at Palmdale after the fleet was retired. In the middle is the X-35A Joint Strike Fighter demonstrator, which at this point was still about four months away from its first flight.
The Advanced Tanker-Cargo Aircraft, or ATCA, was first proposed by officials from the US Air Force’s Strategic Air Command in 1967. The competition, originally intended to replace the KC-135 tanker, got underway in the mid 1970s, with a pair of wide-body commercial airliners, the 747 and DC-10,
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