Colonel Jackie Lynwood "Jack" Ridley (June 16, 1915 – March 12, 1957) was an aeronautical engineer, USAF test pilot and chief of the U.S. Air Force's Flight Test Engineering Laboratory. He helped develop and test many cold war era military aircraft but is best known for his work on the Bell X-1, the first aircraft to achieve supersonic flight. He was highly respected among fellow test pilots, most notably Chuck Yeager, for his engineering skills.