The ARK-4 was a single-engine Soviet flying boat design produced by Chyetverikov.[1]

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Specifications

General characteristics

• Crew: 5
• Length: 14.6 m (47 ft 11 in)
• Wingspan: 20 m (65 ft 7 in)
• Wing area: 59.5 m² (640 sq ft)
• Empty weight: 3,642 kg (8,029 lb)
• Gross weight: 5,600 kg (12,346 lb)
• Powerplant: 2 × Shvetsov M-25V 9-cylinder air-cooled radial piston engines, 560 kW (750 hp) each

Performance

• Maximum speed: 320 km/h (200 mph, 170 kn)
• Range: 1,500 km (930 mi, 810 nmi)
• Service ceiling: 8,500 m (27,900 ft)
• Rate of climb: 4.76 m/s (937 ft/min)

Armament

• Guns:
  

1 x machine gun in a manually operated bow turret

1 x machine-gun in a dorsal sliding hatch

• Bombs: 1,000 kg (2,200 lb) of bombs

See also

• Chyetverikov ARK-3

References