Japanese Engine Research
at the
Smithsonian National Air and Space Museum
Page 4
Nakajima Homare 21 (NK9H)
Army Type 4 1,850hp Radial (Ha 45)
Unified Type Ha45-12
18 Cylinder Radial on Kawanishi N1K2-Ja Shiden Kai George
Take off HP - 2,000 (Metric)
Low blower rated HP - 1,900 (Metric) @ 1,800 meters
High Blower rated HP - 1,700 (Metric) @ 6,400 meters
Boost TO +500 and +300 rated
3,000 RPM at TO and rated power
Two speed supercharger, water methanol injection
Diameter - 1.180 meter
Dry weight - 820 kg
The Homare needs little introduction. This engine and the Nakajima Sakae are two
of Japans most recognized engines.
These two picture will just be the start of the Homare section.
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