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Mitsubishi Ha 42 Model 41 Ru (Ha 214 Ru), Radial 18 Engine, ca. World War II
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Mitsubishi Ha 42 Model 41 Ru (Ha 214 Ru), Radial 18 Engine, ca. World War II
Mitsubishi was the first and largest series producer of Japanese engines during World War II, with a 1937 Pratt & Whitney arrangement possibly contributing to this success. This 18-cylinder, two-row, air cooled aircraft engine incorporated two-speed reduction gearing, a cooling fan, and twin transverse superchargers to achieve two stage supercharging. Four of these engines were to power the Kawasaki Ki-91 Army Experimental Long-range Bomber, which was to be larger than the Boeing B-29 and have a 4, 474 km (2, 796 miles) radius of action. The design of this bomber began in May 1943, and a prototype was under construction at the end of 1944, but planned production was suspended in February 1945 when tooling was destroyed during a B-29 raid before the prototype was completed. Between 1940 and 1945, a total of 2, 813 Mitsubishi Ha 42 series (all models) were built
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This print showcases the Mitsubishi Ha 42 Model 41 Ru (Ha 214 Ru), a remarkable aircraft engine that played a significant role during World War II. Mitsubishi, renowned for being the first and largest series producer of Japanese engines at the time, utilized their expertise to create this powerful radial 18-cylinder engine. Featuring an innovative design, the Ha 42 incorporated two-speed reduction gearing, a cooling fan, and twin transverse superchargers for optimal performance. Its groundbreaking two-stage supercharging capability set it apart from other engines of its era. The Kawasaki Ki-91 Army Experimental Long-range Bomber was intended to be powered by four of these exceptional engines, making it larger than even the famous Boeing B-29 bomber with an impressive radius of action spanning over 4,474 kilometers (2,796 miles). Despite its promising potential in revolutionizing air transport during wartime, production plans were tragically halted due to unforeseen circumstances. A prototype was under construction by the end of 1944; however, a devastating B-29 raid destroyed essential tooling in February 1945 before completion. Between 1940 and 1945 alone, Mitsubishi Heavy Industries successfully manufactured a total of 2,813 Ha 42 series engines across various models. This particular print serves as a testament to both Japan's aviation heritage and Mitsubishi's pivotal contributions to propulsion technology during one of history's most tumultuous periods – World War II.
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