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Hughes Aircraft H-4 Hercules "Spruce Goose"
Military
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North American Aviation X-15
Military
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|---|---|---|
| Quick facts | ||
| Manufacturer | Hughes Aircraft | North American Aviation |
| Type | Experimental & historic pioneers | Experimental & historic pioneers |
| Origin | 🇺🇸 United States | 🇺🇸 United States |
| First flight | 1947 | 1959 |
| Status | Retired | Retired |
| Units built | 1 | 3 |
| Unit cost | — | — |
| Dimensions | ||
| Length | 66.65 m | 15.45 m |
| Wingspan | 97.54 m | 6.80 m |
| Height | 24.18 m | 4.12 m |
| Wing area | 1,061.9 m² | 18.6 m² |
| Weights & fuel | ||
| Empty weight | 113,400 kg | 6,620 kg |
| Max. take-off weight | 181,437 kg | 15,420 kg |
| Performance | ||
| Max. speed | 351 km/h | 7,274 km/h |
| Cruise speed | 282 km/h | — |
| Max. Mach | — | Mach 6.70 |
| Range | 4,800 km | — |
| Service ceiling | 6,370 m | 107,960 m |
| Crew & capacity | ||
| Crew | 3 | 1 |
| Seats (max.) | 750 | — |
| Powerplant | ||
| Engines | 8 | 1 |
| Engine type | — | — |
| Engine model | Pratt & Whitney R-4360-4A Wasp Major | Reaction Motors XLR99 rocket |
| Thrust (each) | — | 262.0 kN |
| Power (each) | 2,238 kW | — |
At a glance
Figures are compiled from public sources and may be approximate; they can vary by variant and configuration.