"The SHIMUSHU class of escorts " Topic

"The SHIMUSHU class of escorts was ordered in 1937. They were capable of functioning either as escorts or minesweepers. In the prewar years, the offensive-minded IJN ordered only four units of the class, also known as Type "A". During the war, 14 modified Type A's, also known as the ETOROFU-class, were completed. Beginning in October 1942, the MIKURA class, also known as Type "B", was laid down, but only eight units were ordered as the IJN continued to accord low priority to escort vessels.

By 1943, increasing losses of merchant shipping caused the IJN to reorder its priorities. Beginning in January 1944 over 30 modified Type B's, known as the UKURU-class, were laid down. The heavy toll exacted by American submarines on the Combined Fleet's East Indies oil supply further caused the IJN to lose some of its hubris, so in 1943 it was decided to design a simplified version of the Type B. The new Type "C" design contemplated use of mass production techniques including electric welding to produce smaller, less powerful escorts, but in much greater numbers. 132 Type C's were ordered and construction began in September 1943.

It was soon realized that Type C's production schedule of between three and six months would outpace Japan's ability to build diesel engines for them. A new Type "D" kaikoban was designed that would be powered by a turbine engine. 143 Type D's were ordered and construction began in October 1943. In 1944, construction of some units was suspended and others cancelled to permit construction of KORYU submarines and KAITEN human torpedoes…"
Main page
link

Amicalement
Armand