--- title: "Why the SR-71 Blackbird is the only aircraft with the SR designation" description: "The SR-71 Blackbird could have flown across the 6,000-mile-long Soviet Union in less than an hour. There's a reason we all love it." date: "2023-01-11" modified: "2025-08-26" authors: - name: "Blake Stilwell" job_title: "Editor-In-Chief, Air Force Veteran" link: "https://www.wearethemighty.com/authors/blake/" url: "https://www.wearethemighty.com/mighty-history/sr-71-blackbird-2/" categories: - "Air Force" - "Aircraft" - "History" - "Tactical" - "War History" tags: - "Air Force" - "Aircraft" - "CIA" - "Presidents" - "SR-71" --- # Why the SR-71 Blackbird is the only aircraft with the SR designation ![SR-71 blackbird revealed getty]() *The U.S. Air Force Lockheed SR-71 Blackbird Long-Range Mach 3 Military Reconnaissance Jet Aircraft – A Skunk Works Black Project – in 1966. (Getty Images/P. Wallick)* There are an unending number of interesting facts about the [SR-71 Blackbird](), probably the coolest aircraft ever produced by any air force, anywhere in the world. It’s the only airframe made of 85% titanium, which the CIA purchased from the Soviet Union – the country the aircraft was built to spy on. It’s capable of cruising at more than three times the speed of sound at 85,000 feet, and that speed and altitude are its only defenses. They're also the only defenses it needed. ![Lockheed SR-71 Blackbird USAF]() *The SR-71B Blackbird, flown by the Dryden Flight Research Center as NASA 831, slices across the snow-covered southern Sierra Nevada Mountains of California after being refueled by an Air Force tanker during a 1994 flight. SR-71B was the trainer version of the SR-71. (U.S. Air Force/Judson Brohmer)* Top that off with the awesome-looking, specially designed pressure suits made for wear by SR-71 pilots, and it’s no wonder why the Blackbird is every kid’s (and [Cold War]() historian’s) favorite aircraft. It’s also the only Air Force aircraft ever made with the “SR” designation. The reason for that is actually a mistake made at the White House in 1964. If one were to go back in time and look at the press conferences, manuals, and other material related to the SR-71 [Blackbird]() and the revelation of its existence, they might not notice anything was ever flubbed by the President of the United States. A deeper look into the speeches made by the president that year shows that Johnson may have made a slip-up, but his loyal military officers simply changed the name of the bird to suit the president’s flub. It also could have been a mistake by the White House stenographer. Even Clarence “Kelly” Johnson, the brain behind some of America’s most stunning aircraft, was unsure. It was what the president said on TV that stuck. The SR-71 was created by Lockheed’s Skunkworks, the wonder weapons department known for producing the P-38 Lightning, the U-2 Dragon Lady, and a top-secret, high-speed, high-altitude reconnaissance aircraft dubbed the A-12 (among other notable works). The A-12 was the predecessor to the SR-71, had many of the same features, and was first flown in 1963. The project would evolve into the SR-71 by 1964, featuring a reduced radar cross-section, an extended fuselage to accommodate more fuel, and a two-seat cockpit. In the 1960s, the CIA and the Air Force were already conducting SR-71 reconnaissance missions over the Soviet Union, and the aircraft’s existence and capabilities were closely guarded secrets. By 1964, however, that secrecy was beginning to affect the re-election campaign of President Lyndon B. Johnson, who had assumed the presidency after the assassination of John F. Kennedy in 1963. Johnson was repeatedly attacked by his Republican challenger for the U.S. military falling behind the Soviet Union in terms of technology. Senator Barry Goldwater blamed the lack of military preparedness and technological advancement on President Johnson. So Johnson decided that he would reveal the existence of this awesome aircraft and some of its associated technology to the American people. He unilaterally declassified the Blackbird program. ![Sr-71 blackbird johnson getty]() *President Johnson during his news conference in the State Department Auditorium. He announced development of a new long-range reconnaissance airplane, which he said would be the "most advanced in the world." It is the SR-71 long-range strategic reconnaissance plane. (Bettman/Getty Images)* On July 25, 1964, President Johnson [gave a speech to the American people]() to tell them about this state-of-the-art spy plane the United States had been using against the Soviet Union. The White House stenographer, [apparently confused by earlier references to the RS-70 Valkyrie](), wrote “RS-71” in the White House transcript. President Johnson’s speech itself, however, referred to it as the SR-71. The fact that the program was declassified that day makes it even harder to go back and get a definitive ruling on its intended designation. The buck clearly stopped with the President of the United States, because all subsequent manuals, instructions, and media references use the SR designation for the aircraft. ## Author Blake Stilwell is We Are The Mighty's Editor-in-Chief, covering military news, entertainment, and history, along with veteran education, employment and entrepreneurship. He is a former U.S. Air Force combat cameraman with degrees in Graphic Design, Television and Film, International Relations, Public Relations, Business Management and Middle Eastern Affairs. After leaving the military, he began working in film and television production in New York and Los Angeles, work that included ABC News, NBC Olympics, and HBO Sports. He then spent two years in Washington with White House Communications, before joining the Near East Foundation. At NEF he served as an International Development Fellow, then Communications Officer, and finally, Media Officer for the Middle East and Africa. Based in the Palestinian Territory, he coordinated strategic communications between eight country offices, international media, and government and NGO partners. He began a career focused on writing and editing in 2015 with We Are The Mighty. He left in 2019 for Military.com, but returned as Editor-in-Chief in 2025. Blake’s work has been seen on CBS News, Fox News, CBC, The Chicago Tribune, Task & Purpose, Military Times, Recoil, Skillset, American History, and was shockingly even used in a Supreme Court argument. He is an avid traveler and small business owner in Ohio, where he spends most of his energy fixing up a very old house. ### Author social links [Facebook]() [Twitter]() [Instagram]() [LinkedIn]()