David Knights' Weblog

October 21, 2021

Type A Ko-hyoteki (甲標的甲型) Target “A” Midget Submarines and the Attack on Pearl Harbor

Filed under: Modeling — dknights @ 10:00 pm

Another great Inch High post

Inch High Guy

The Japanese Ko-hyoteki midget submarines were used in several theaters of the Pacific War, but their first and most famous use was during the attack of Pearl Harbor on 07DEC41. They were 80 feet in length. They were powered by a 600 horsepower (447 kW) electric motor, which could drive them at a maximum speed of 23 knots (43 km/h) or for 100 nautical miles (190 km) at a low speed. They carried a crew of two and two torpedoes, which were loaded externally from the bow.

For the Pearl Harbor raid they were carried piggy-back by five I-16 class fleet submarines and launched outside the harbor entrance. The minisubs were launched during the night before the raid, with orders to penetrate the harbor and attack. Nominally they were to rendezvous with their parent submarines after completing their missions, but the crews were under no delusions of the likelihood for…

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