The Nakajima Ha219 (also known as the Ha-44 under the unified designation system, BH by the company and NK11A by the Imperial Japanese Navy Air Service (IJNAS)), was a late war Imperial Japanese Army Air Force (IJAAF) 18-cylinder air-cooled radial engine, used on the Tachikawa Ki-94-II, Nakajima Ki-84-N and Nakajima Ki-87.
Variants and designations Data from: Japanese Aero-Engines 1910-1945 BH Company designation Ha219 IJAAF Hatsudoki designation Ha219Ru fitted with a large turbo-charger alternative designation for the Ha-44 model 12 Ha-44 Unified (IJAAF & IJNAS) designation system Ha-44 model 11 A prototype turbocharged engine for the Ki-87. Ha-44 model 12 Similar to the Model 11 and probably sporting a 16-bladed cooling fan in the cowling intake. Ha-44 model 13 A planned variant to power the Navy 20-shi A Carrier Fighter NK11A Planned engines for a scaled down Nakajima G10N1 (Navy Experimental Heavy Bomber Fugaku) (Fugaku - Mount Fuji)
Applications A total of around 10 engines were built, but the engine suffered from over-heating at low speeds and required large amounts of maintenance. Around 7 were issued to the Kitai squadron in late 1945 and used on the new Ki-84-N, lacking the supercharger installed on the Ki-94-2 and Ki-87. most are believed to have been scrapped or destroyed after the war along with documentation. Nakajima Ki-87 Nakajima G10N1 (Navy Experimental Heavy Bomber Fugaku) Nakajima Ki-84-N Tachikawa Ki-94-2
Specifications (Ha219 / BH / NK11A / Ha-44)
References