Nakajima Hikari

The Nakajima Hikari (Japanese: 光 "Light") was a nine-cylinder, air-cooled, radial aircraft engine developed in Japan for Navy use during World War II by the Nakajima Aircraft Company. It was a development of the Nakajima Kotobuki and Wright Cyclone. In Army use it was known as the Ha8.

Hikari
Type	Piston aircraft engine
Manufacturer	Nakajima Aircraft Company
Major applications	Aichi D1A
Developed from	Nakajima Kotobuki

Variants

Hikari 1

820 hp (610 kW)

Hikari 1 kai

670–730 hp (500–540 kW)

Hikari 2

750–840 hp (560–630 kW)

Hikari 3

770 hp (570 kW)

Applications

• Aichi D1A2
• Aichi D3A (first prototype)
• Kawasaki Ki-45 (first prototype)
• Mitsubishi F1M1
• Nakajima A4N
• Nakajima B5N1
• Nakajima C3N
• Yokosuka B4Y (B4Y1 fourth plane onward)

Specifications

General characteristics

• Type: 9-cylinder air-cooled radial aircraft piston engine
• Bore: 160 mm (6.3 in)
• Stroke: 180 mm (7.1 in)
• Displacement: 32.57 L (1,988 cu in)
• Diameter: 1.375 mm

Components

• Cooling system: Air-cooled

Performance

• Power output: 820 hp (610 kW)

See also

Related development

• Nakajima Kotobuki

Related lists

• List of aircraft engines

References

• Goodwin, Mike & Starkings, Peter (2017). Japanese Aero-Engines 1910-1945. Sandomierz, Poland: MMPBooks. ISBN 978-83-65281-32-6.

External links

• Classic Aeroplane Museum Nihon Koukuuki Jiten