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Kawanishi N1K1 Kyofu
"Mighty Wind"
Type: Float plane fighter
Origin: Kawanishi Kokuki K.K.
Crew: One
Allied Code Name: Rex
Models: N1K1
First Flight: May 1942
Service Delivery: July 1943
Final Delivery: May 1944
Production: 97
– 8 prototypes and service trial airframes.
– 89 production aircraft.
Powerplant(s):
  Prototype:
    Model: Mitsubishi MK4D Kasei 14
    Type: 14-Cylinder Air-Cooled radial
    Number: One
    Horsepower:
    – Take-Off Power: 1,460 hp
    – At 8,860 ft. (2,700m): 1,400 hp
    – At 20,045 ft. (6,100m): 1,260 hp
    Propeller: Two contra-rotating twin blade
                    metal propellers

  Remaining prototypes and early production:
    Model: Mitsubishi MK4C Kasei 13
    Type: 14-Cylinder Air-Cooled radial
    Number: One
    Horsepower:
    – Take-Off Power: 1,460 hp
    – At 6,560 ft. (2,000m): 1,420 hp
    – At 19,685 ft. (6,000m): 1,300 hp
    Propeller: Three blade metal propeller

  Late production:
    Model: Mitsubishi MK4E Kasei 15
    Type: 14-Cylinder Air-Cooled radial
    Number: One
    Horsepower:
    – Take-Off Power: 1,530 hp
    – At 8,530 ft. (2,600m): 1,400 hp
    – At 19,685 ft. (6,000m): 1,280 hp
    Propeller: Three blade metal propeller

   Dimensions:
Wing Span: 39 ft. 7/16 in. (12m)
Length: 34 ft. 8-7/8 in. (10.589m)
Height: 15 ft. 7 in. (4.75m)
Wing Area: 252.951 sq. ft. (23.5m²)
Weights:
Empty: 6,067 lb. (2,752 kg.)
Loaded: 7,716 lb. (3,500 kg.)
Maximum: 8,184 lb. (3,712 kg.)
Wing Loading: 30 lb.5 lb/sq ft (148.9 kg/sq m)
Power Loading: 5 lb/hp (2.3 kg/hp)
Performance:
Maximum Speed:
– 18,700 ft. (5,700m): 304 mph
Cruising Speed:
– 6,560 ft. (2,000m): 230 mph
Cilmb to 16,405 ft. (5,000m): 5 min. 32 sec.
Service Ceiling: 34,645 ft (10,560m)
Range:
– Normal: 570 nauitcal miles
– Maximum: 900 nautical miles
Armament:
7.7mm Type 97 machine gun
    Number: Two         Location: Fuselage

20mm Type 99 Model 1 cannon
    Number: Two         Location: Wing

External Stores:
Two 66 lb. (30 kg.) Bombs.

Comments:
The Kyofu was originally to be equipped with contra-rotating props but technical difficulties led to a conventional propeller system being used.
Sources:
The Complete Encyclopedia of World Aircraft, 1997, Barnes & Nobles Books, ISBN: 0 7607 0592 5
Japanese Aircraft of the Pacific War, René J. Francillon, 1970, Naval Institue Press, ISBN: O-87021-313-X
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