SR. The SR-71 Blackbird is quite possibly the most secretive aircraft the world has ever known. Its unique design, engineering, and speed remain unchallenged by few aircraft after over 50 years. However, it also has a designation unlike any other aircraft, and there is an intriguing story behind the “SR-71” Blackbird. Created by aviation guru Kelly Johnson … Continue reading Why The Blackbird Is The Only Aircraft Designated “SR”