Power & Performance
Those special qualities that separate one aircraft design from another. Performance specifications presented assume optimal operating conditions for the Hughes H-4 Hercules Heavy-Lift Transport / Flying Boat Prototype.
8 x Pratt & Whitney 28-cylinder R-4360 propeller engines developing 3,000 horsepower each.
Propulsion
199 mph
320 kph | 173 kts
Max Speed
20,899 ft
6,370 m | 4 miles
Service Ceiling
2,983 miles
4,800 km | 2,592 nm
Operational Range
1,000 ft/min
305 m/min
Rate-of-Climb