XB-70 Valkyrie vs Boeing 747SP
Top speed, range, size and history side by side. Each was built for its own job, so this shows how they differ, not which is better.
The XB-70 Valkyrie is faster: 3,309 km/h against 994 km/h for the Boeing 747SP. The Boeing 747SP flies further: 10,800 km against 6,900 km for the XB-70 Valkyrie. The Boeing 747SP has the wider wingspan: 59.6 m against 32 m for the XB-70 Valkyrie. The Boeing 747SP is heavier at takeoff: 318 tonnes against 246 tonnes for the XB-70 Valkyrie. The XB-70 Valkyrie first flew in 1964, 11 years before the Boeing 747SP (1975).
| XB-70 Valkyrie | Boeing 747SP |
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| Top speed | 3,309 km/h (2,056 mph) | 994 km/h (618 mph) |
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| Range | 6,900 km (4,287 miles) | 10,800 km (6,711 miles) |
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| Length | 57.6 m (189 ft) | 56.3 m (185 ft) |
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| Wingspan | 32 m (105 ft) | 59.6 m (196 ft) |
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| Max takeoff weight | 246 t (542,332 lb) | 318 t (701,063 lb) |
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| First flight | 1964 | 1975 |
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| Crew and capacity | 2 crew | Up to 331 passengers |
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| Engines | 6 × YJ93 afterburning turbojet | 4 × turbofan |
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| Built by | North American | Boeing |
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| Country | USA | USA |
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