Boeing 747SP vs Boeing YC-14
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 Boeing 747SP is faster: 994 km/h against 811 km/h for the Boeing YC-14. The Boeing 747SP flies further: 10,800 km against 5,134 km for the Boeing YC-14. The Boeing 747SP has the wider wingspan: 59.6 m against 39.3 m for the Boeing YC-14. The Boeing 747SP is heavier at takeoff: 318 tonnes against 114 tonnes for the Boeing YC-14. The Boeing 747SP first flew in 1975, 1 year before the Boeing YC-14 (1976).
| Boeing 747SP | Boeing YC-14 |
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| Top speed | 994 km/h (618 mph) | 811 km/h (504 mph) |
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| Range | 10,800 km (6,711 miles) | 5,134 km (3,190 miles) |
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| Length | 56.3 m (185 ft) | 40.2 m (132 ft) |
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| Wingspan | 59.6 m (196 ft) | 39.3 m (129 ft) |
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| Max takeoff weight | 318 t (701,063 lb) | 114 t (251,104 lb) |
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| First flight | 1975 | 1976 |
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| Crew and capacity | Up to 331 passengers | About 12 t of cargo from short runways |
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| Engines | 4 × turbofan | 2 × General Electric CF6-50D turbofan |
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| Built by | Boeing | Boeing |
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| Country | USA | USA |
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