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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 Ha20.

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