YF-23 Black Widow II vs Lockheed Martin X-35
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 YF-23 Black Widow II is faster: 2,335 km/h against 1,930 km/h for the Lockheed Martin X-35. The YF-23 Black Widow II flies further: 4,500 km against 2,200 km for the Lockheed Martin X-35. The YF-23 Black Widow II has the wider wingspan: 13.3 m against 10.1 m for the Lockheed Martin X-35. The YF-23 Black Widow II is heavier at takeoff: 29 tonnes against 23 tonnes for the Lockheed Martin X-35. The YF-23 Black Widow II first flew in 1990, 10 years before the Lockheed Martin X-35 (2000).
| YF-23 Black Widow II | Lockheed Martin X-35 |
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| Top speed | 2,335 km/h (1,451 mph) | 1,930 km/h (1,199 mph) |
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| Range | 4,500 km (2,796 miles) | 2,200 km (1,367 miles) |
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| Length | 20.6 m (68 ft) | 15.5 m (51 ft) |
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| Wingspan | 13.3 m (44 ft) | 10.1 m (33 ft) |
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| Max takeoff weight | 29 t (63,933 lb) | 23 t (50,044 lb) |
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| First flight | 1990 | 2000 |
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| Crew and capacity | 1 pilot | 1 pilot |
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| Engines | 2 × prototype turbofan | 1 × afterburning turbofan (plus a lift fan in the X-35B) |
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| Built by | Northrop / McDonnell Douglas | Lockheed Martin |
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| Country | USA | USA |
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