Boeing 747SP vs 747-100

The 747SP answered a question everyone else had given up on: what if the 747 were built to fly further instead of to carry more? Boeing’s answer cut the fuselage by nearly 48 ft, and the result — for four seats per row fewer than a 747-100 — became the longest-range 747 of its generation.

Why shorten an airliner

The 747-100 could carry 366 people about 4,620–5,300 nautical miles. The routes Pan Am wanted — Tehran to New York, and the long Pacific sectors — needed more range than a full 747-100 could deliver.

Removing a fuselage plug does two things at once: it cuts weight for the same wing and engines, and it cuts drag. The SP’s 5,830-nautical-mile range came from exactly that — not from more fuel, but from less aircraft to carry.

	747-100	747SP
Fuselage length	231 ft 10 in	184 ft 9 in
Wingspan	195 ft 8 in	195 ft 8 in (unchanged)
Passengers, 3-class	366	276
Max takeoff weight	735,000 lb	700,000 lb
Range	~4,620–5,300 nmi	5,830 nmi (10,800 km)
Cruise	Mach 0.84	Mach 0.86

The trade that nobody repeated

The SP’s trick was never repeated, for a reason: it was a niche answer to a niche question. It carried over forty fewer people at a higher cost per seat than a -100, and once the later, heavier classics such as the -200B could match its range while lifting a full main deck, the SP’s reason to exist evaporated.

It was ordered for one job and done: 45 built, against 168 -100s. Its survivors include government and VIP examples, which valued exactly what the design gives — a long-range 747 with the shortest fuselage Boeing could hang on the standard wing. In the identification guide it is the instant answer: if the tail looks too big for the body, it is the SP.