Specifications (H6K4)Data from Warplanes of the Second World War, Volume Five: Flying Boats;[3] Japanse Aircraft of the Pacific War[7]

General characteristics

Crew: 9
Length: 25.63 m (84 ft 3 in)
Wingspan: 40.00 m (131 ft 2 in)
Height: 6.27 m (20 ft 6 in)
Wing area: 170 m<sup2 (1,830 ft<sup2)
Empty weight: 11,707 kg (25,755 lb)
Loaded weight: 17,000 kg (37,400 lb)
Max takeoff weight: 21,500 kg (47,300 lb)
Powerplant: 4 × Mitsubishi Kinsei 43 or 46 14-cylinder, air-cooled, radial engines, 746 kW (1,000 hp) each
Performance

Maximum speed: 331 km/h (211 mph)
Cruise speed: 138 mph
Range: 6,580 km (4,112 mi)
Service ceiling: 9,610 m (31,520 ft)
Rate of climb: 370 m/min (1,213 ft/min)
Wing loading: 100 kg/m<sup2 (20 lb/ft<sup2)
Power/mass: 0.17 kW/kg (0.11 hp/lb)
Armament


1× 7.7 mm (0.30 in) Type 97 machine gun in nose
1× Type 97 machine gun in spine
2× Type 97 machine guns in waist blisters
1× 20 mm Type 99 cannon in tail turret
2× 800 kg (1,764 lb) torpedoes or 1,000 kg (2,205 lb) of bombs