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Nakajima Aircraft Company

 Country: Empire of Japan

 Industry/ Capability:
Japan's first aircraft MFR.
Nakajima's MFG. facilities:
Tokyo plant
Musashino plant
Donryu plant
Ota plant
Koizumi plant


 Head Office:
Yurakukan, Marunouchi, Tokyo

 Noteworthy:
Nakajima B5N Kate
Nakajima Ki-43 Oscar
Nakajima Ki-44 Tojo
Nakajima A6M2-N (A6M Zero floatplane)
Nakajima Ki-84 Frank
Nakajima Sakae engine ...
* partial list



 Additional Notes:

Nakajima was one of the few companies that controlled all aspects of its manufacturing. From airframes to engines to all subparts and assemblies, Nakajima produced each part in its own factory.

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Nakajima Sakae 21

powered the famed Mitsubishi Zero and Nakajima's own Hayabusa fighter


Navy designations were Sakae (Glory, Prosperity) 10, 20 and 30 series. The Imperial Army used the designations Ha-25, Ha-105 and Ha-115.
The significant difference between Sakae 21 and 31 was simply the water-methanol injection system.

Historically accurate military Sakae engine blueprint
Developed on 42"x 30" uncut master sheet
Expertly restored from original plans & vintage design drawings
Real blueprint, developed from our vault of vellum masters
Detailed orthographic military blueprint - translated to english

Nakajima's Sakae Prosperity engine

Nakajima's Sakae Prosperity was a two-row, 14-cylinder air-cooled two row radial engine used in many (including the legendary Mitsubishi Reisen A6M Zero ...   continues: Click here

Hover Over Image to Enlarge  
ww2_motor-sakae-21-engine-b.jpg ww2_motor-sakae-21-engine-c.jpg ww2_motor-sakae-21-engine-a.jpg

Nakajima's supercharged radial engine… pushed the performance of the A6M well past the original Mitsubishi specifications. — the Zero would go on to become the stuff of legend.

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History and Description: Nakajima Sakae 21...
Nakajima Sakae 21
Historically accurate military Sakae engine blueprint
Developed on 42"x 30" uncut master sheet
Expertly restored from original plans & vintage design drawings
Real blueprint, developed from our vault of vellum masters
Detailed orthographic military blueprint - translated to english

Nakajima's Sakae Prosperity engine

Nakajima's Sakae Prosperity was a two-row, 14-cylinder air-cooled two row radial engine used in many (including the legendary Mitsubishi Reisen A6M Zero... continues below
Continued from above…     Reisen A6M Zero Fighter) Japanese aircraft during World War II.

As installed in a Mitsubishi A6M3 Zero, the Sakae 21 radial engine developed 1,020 hp. at 2,600 rpm. at 6,400 ft., turning a 10 ft. 3-in, diameter constant speed propeller, which is very similar to Hamilton Standard design. "Sakae" was the navy designation; the army called the first of the series the Ha-25 and later versions were designated Ha105, Ha115. Navy designations were NK1 Sakae 10, 20 and 30 series.

A total of 21,166 were made by Nakajima; 9,067 were manufactured by other firms.
Nakajima's Sakae Prosperity engine powered the:

A6M "Zero"
Ki-45 "Nick"
Ki-43 "Oscar"
A6M2-N "Rufe"
C5M "Babs"
J1N "Irving"
Ki-48 "Lily"
Ki-56 "Thalia"
B5N2 "Kate"

Model Horsepower Notes
11 1000 hp (takeoff)
970 hp (9800 feet)
Also known as the NK1B or Ha-35/ 11
12 940 hp (takeoff)
950 hp (13,800 feet)
Also known as the NK1C or Ha-35/ 12
21 1130 hp (takeoff)
1100 hp (9350 feet)
980 hp (19,700 feet)
Also known as the NK1F or Ha-35/ 21

The Sakae 22 was a mirror image
developed for the J1N "Irving"

Army Type 99 Ha-25 980 hp (takeoff)
970 hp (11,155 feet)
 
Army Type 1 Ha-115 1150 hp (takeoff)
1150 hp (8040 feet)
980 hp (18,375 feet)
Also known as the Ha-35/ 25
Army Type 1 Ha-115-II 1190 hp (takeoff)
1230 hp (9,185 feet)
950 hp (22,310 feet)
 
Debs McCaffrey