PlaneSpottingWorld welcomes all new members! Please gives your ideas at the Terminal.
Nakajima Homare
The Nakajima Homare (誉, "praise" or, more usually, "honour") was an air-cooled twin-row 18 cylinder radial Japanese aircraft engine manufactured during World War II. Producing almost 2,000 HP, it was used widely by both the Imperial Japanese Army and the Imperial Japanese Navy. "Homare" was the navy service designation, and their experimental designation for it was NK9; the army called it the Ha-45 (ハ45) or, in service, the 1900hp Type 4. The manufacturer's designation was BA (or NBA).[1]
Contents
Design and development
Development of the Homare started in 1940, and certification was completed in 1941. It succeeded Nakajima's previous 14 cylinder Sakae (Ha-25) engine, with its forward nine cylinders staggered from the rear nine for efficient cooling.
The design was exceptionally compact, with an external diameter of 118 cm, a mere 3 cm larger than the Sakae. With a bore and stroke of 130 mm x 150 mm, it was classified as a short-stroke engine. It was designed to output around 1800 hp (1340 kW), or 100 hp (75 kW)per cylinder. However, the tight design of the engine made it difficult to maintain quality in manufacturing, and unreliability in the field was a significant problem; actual output of early models at altitude was in the range of 1300 hp (970 kW), far below the designed capability. Later models had improved performance, and it became one of the predominant powerplants of Japanese military aircraft in the latter part of the war. A total of 8,747 were produced.
Variants
- Homare 11 - 1,650 hp (1,230 kW) , 1,820 hp (1,357 kW) , 1,900 hp (1,417 kW)
- Homare 12 - 1,825 hp (1,361 kW)
- Homare 21 - 1,990 hp (1,484 kW)
Applications
Specifications (Homare)
See Also
Related lists
Lists relating to aviation | |
|---|---|
| General | Timeline of aviation · Aircraft · Aircraft manufacturers · Aircraft engines · Aircraft engine manufacturers · Airports · Airlines |
| Military | Air forces · Aircraft weapons · Missiles · Unmanned aerial vehicles (UAVs) · Experimental aircraft |
| Notable incidents and accidents | Military aviation · Airliners · General aviation · Famous aviation-related deaths |
| Records | Flight airspeed record · Flight distance record · Flight altitude record · Flight endurance record · Most produced aircraft |
References
Notes
- ↑ Gunston 1989, p.105.
Bibliography
- Jane's Fighting Aircraft of World War II. London. Studio Editions Ltd, 1998. ISBN 0-517-67964-7
- Gunston, Bill. World Encyclopaedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
Lists relating to aviation | |
|---|---|
| General | Timeline of aviation · Aircraft · Aircraft manufacturers · Aircraft engines · Aircraft engine manufacturers · Airports · Airlines |
| Military | Air forces · Aircraft weapons · Missiles · Unmanned aerial vehicles (UAVs) · Experimental aircraft |
| Notable incidents and accidents | Military aviation · Airliners · General aviation · Famous aviation-related deaths |
| Records | Flight airspeed record · Flight distance record · Flight altitude record · Flight endurance record · Most produced aircraft |
cs:Nakadžima Homare es:Nakajima Homare it:Nakajima Homare ja:誉 (エンジン)
| This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Nakajima Homare". |
