Boeing's 747SP Falls Short by One Plane in Face of Changing Market

Boeing's ambitious long-range Boeing 747SP was designed to make exceptionally long, relatively thin routes viable. However, by the time its production run was nearing its end in 1982, the economics of flying with four engines had begun to change dramatically.

The 747SP was a shortened version of the standard 747, with roughly 48 feet (14.7 meters) cut from the fuselage and a lighter structure that reduced empty weight by around 45,000 pounds (20,400 kg). This allowed the same four engines to push the aircraft higher, faster, and farther on a full tank.

Boeing projected a total market of 214 aircraft and set an internal break-even point at 45 airframes. The production run came within a single sale of reaching this target, with 44 planes built before shutting down in 1982.

The shortfall wasn't just about salesmanship; something bigger had already turned the entire 'long and thin' thesis upside down. Rising fuel prices, particularly after the OPEC oil embargo in 1973, made the four-engine niche shrink. The introduction of twin-engine widebodies like Boeing's own 767 further changed the landscape.