Boeing 707 ushering in the Jet Age. It established Boeing as one of the largest manufacturers of passenger aircraft, and led to the later series of airliners with "7x7" designations. The later 720, 727, 737, and 757 share elements of the 707's fuselage design. The 707 was developed from the Boeing 367-80, a prototype jet first flown in 1954. A larger fuselage cross-section and other modifications resulted in the initial-production 707-120, powered by Pratt & Whitney JT3C turbojet engines, which first flew on December 20, 1957. Pan American World Airways began regular 707 service on October 26, 1958. Later derivatives included the
William Boeing 74, just three days before his 75th birthday, and a year before the first successful commercial jet airliner, the Boeing 707, would take its first flight. He was pronounced dead on arrival at the Seattle Yacht Club, having had a heart attack aboard his yacht in Puget Sound, Washington. His ashes were scattered off the coast of British Columbia, where he spent much of his time sailing the "Taconite", his yacht. He was posthumously inducted into the Aviation Hall of Fame in Dayton, Ohio, in 1966. In 1984, Boeing was inducted into the International Air & Space Hall of Fame