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) 2,461 hp (1,835 kW) 18-cylinder air-cooled radial engine, used on the Tachikawa Ki-94-II, Nakajima Ki-84-N and Nakajima Ki-87.
| Ha219 | |
|---|---|
| Type | 18-cylinder two-row radial aircraft engine |
| National origin | Japan |
| Manufacturer | Nakajima |
| Number built | ~10 |
Variants and designations
editData from: Japanese Aero-Engines 1910-1945[1]
- 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 2,400 hp (1,800 kW) 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
editA 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)
editData from Japanese Aero-Engines 1910-1945[1]
General characteristics
- Type: 18-cylinder air-cooled two-row radial piston engine
- Bore: 146 mm (5.75 in.)
- Stroke: 160 mm (6.30 in.)
- Displacement: 48.2 L (2,941 cu in.)
- Length: 1524 mm (60 in.)
- Diameter: 1280 mm (50.4 in.)
- Dry weight: 1,150 kg (2,535 lb)
Performance
- Power output: 2,400 hp (1,800 kW) at 2,700rpm
- Compression ratio: 7.2
- boost +350 mm Hg
References
edit- ^ a b Goodwin, Mike; Starkings, Peter (2017). Japanese Aero-Engines 1910-1945. Sandomierz, Poland: MMP Books / Stratus Sp.J. pp. 175–176. ISBN 978-83-65281-32-6.