Military Aircraft Videos

sr-71 BLACKBIRD

now obsolete ? The Lockheed SR-71 is an advanced, long-range, Mach 3 strategic reconnaissance aircraft developed from the Lockheed YF-12A and A-12 aircraft by the Lockheed Skunk Works. The SR-71 was unofficially named the Blackbird, and called the Habu ("snake") by its crews. Clarence "Kelly" Johnson was responsible for many of the design's advanced concepts, with the SR-71 being one of the first aircraft shaped to reduce its radar cross section, although its radar signature could be tracked by contemporary systems unlike later "stealth" aircraft. A defensive feature of the aircraft is its high speed and operating altitude; whereby if a surface-to-air missile launch was detected, standard evasive action was simply to accelerate. The SR-71 line was in service from 1964 to 1998, with 12 of the 32 aircraft being destroyed in accidents, though none were lost to enemy action. * 3,551 Mission Sorties Flown * 17,300 Total Sorties Flown * 11,008 Mission Flight Hours * 53,490 Total Flight Hours * 2,752 hours Mach 3 Time (Missions) * 11,675 hours Mach 3 Time (Total) There were a number of features in the SR-71 that were designed to reduce its radar signature. The first studies in radar stealth technology seemed to indicate that a shape with flattened, tapering sides would reflect most radar away from the place where the radar beams originated. To this end, the radar engineers suggested adding chines (see below) to the design and canting the vertical control surfaces inward. The plane also used special radar-absorbing materials which were incorporated into sawtooth shaped sections of the skin of the aircraft, as well as cesium-based fuel additives to reduce the exhaust plumes' visibility on radar. The overall effectiveness of these designs is still debated; Ben Rich's team could show that the radar return was, in fact, reduced, but Kelly Johnson later conceded that Russian radar technology was advancing faster than the "anti-radar" technology Lockheed was using to counter it. The SR-71 made its debut years before Pyotr Ya. Ufimtsev's ground-breaking research made possible today's stealth technologies, and, despite Lockheed's best efforts, the SR-71 was still easy to track by radar and had a huge infrared signature when cruising at Mach 3.2 or more. It was visible on air traffic control radar for hundreds of miles, even when not using its transponder. SR-71s were evidently detected by radar as missiles were often fired at them. The flight characteristics of the SR-71 made it almost invulnerable during its service life; not one was shot down, despite over 4,000 attempts to do so