The flying boat could carry twelve 60-kg bombs, four 250-kg bombs, or two 800-kg Type 91 Model 1 torpedoes.Ī major weakness of all H6K flying boats was the lack of protective armor for the crew and for the fuel tanks. The H6K4 was armed with four 7.7mm Type 97 (Lewis) machine guns with 582 rounds apiece and, in the tail turret, one 20mm Type 99-I cannon with 432 rounds.
Its fuselage included waist blisters fitted with machine guns, which required a slightly longer tail section.
The H6K4 carried more fuel than earlier models, increasing its maximum range to 25 hours, or 6000 kilometers. Afterwards, the slightly more powerful Kinsei 46 was used. The first 119 planes were fitted with a air-cooled 14-cylinder twin-row radial Mitsubishi Kinsei 43 engine (1000 hp). The most common variant was model 22 (H6K4), created in 1940. The plane was approved by the Imperial Japanese Navy as Type 97 Large Flying Boat in 1937. An experimental version, the Type S, made its first flight on July 14, 1936. A quad-engined all-metal parasol-wing monoplane flying boat.
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