The Pacific War Online Encyclopedia
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U.S. Navy. Via Francillon (1979).
The Nakajima
Kotobuki ("Congratulations") was an air-cooled nine-cylinder
radial engine based on the Bristol
Jupiter. It was known in Army service as the Ha-1 but was never
assigned a joint designation. It cylinder design became the basis
for a long line of successful Japanese aircraft engines, including
the Ha-5, Ha-41, and Ha-109.
| Model |
Horsepower |
Wattage |
Notes |
|---|---|---|---|
| Kotobuki 3 |
640 hp (takeoff) 715 hp (9185 feet) |
471 kW (takeoff) 526 kW (2800m) |
|
| Kotobuki 2 KAI 1 |
580 hp (takeoff) 630 hp (4,920 feet) |
427 kW (takeoff) 463 kW (1500m) |
|
| Kotobuki 2 KAI 2 |
630 hp (takeoff) 460 hp (9845 feet) |
464 kW (takeoff) 338 kW (3000m) |
|
| Kotobuki 2 KAI 3A |
610 hp (takeoff) 690 hp (10,665 feet) |
469 kW (takeoff) 343 kW (3250m) |
|
| Kotobuki 41 |
710 hp (takeoff) 785 hp (9845 feet) |
522 kW (takeoff) 577 kW (3000m) |
|
| Ha-1b |
710 hp (takeoff) 780 hp (9185 feet) |
529 kW (takeoff) 582 kW (2800m) |
Army version of Kotobuki 41? |
References
Goodwin and
Starkings (2017)
Gunston (2006)
The Pacific War Online Encyclopedia © 2006-2007, 2009, 2011, 2019 by Kent G. Budge. Index
