Nakajima Ha 105 Toku, Radial 14 Engine
date: label: Date
content: June 1941
name: label: Manufacturer
content: Nakajima Hikoki K. K.
notes: label: Physical Description
content: Type: Reciprocating, 14 cylinders, 2 rows, radial, air-cooled
label: Physical Description
content: Power rating: 858 kW (1,150 hp) at 2,700 rpm
label: Physical Description
content: Displacement: 27.9 L (1,704 cu in.)
label: Physical Description
content: Bore and Stroke: 130 mm (5.1 in.) x 150 mm (5.9 in.)
label: Physical Description
content: Weight: 585 kg (1,289 lb)
label: Summary
content: The Nakajima Ha 105 began development as a transitional engine between the Ha 25 and the Ha 115, both of which were mass produced. Specifically built for very low fuel consumption, only four are known to have been built.
label: Summary
content: In January 1940, the Asahi Press requested the Aeronautical Research Institute of the University of Tokyo to design a long-distance record-breaking aircraft with a range exceeding 15,000 km (9,321 miles) and minimum cruising speed of 300 km/h (186 mph). With approval of the Japanese Army, the project received the designation A-26 (A referring to Asahi and 26 for the Japanese year, 2600 (A.D. 1940)).
label: Summary
content: The aircraft was eventually powered by the higher powered Ha 115 Toku engines. With the onset of World War II, the objective changed to making the plane a long-range communication aircraft, and redesignated Tachikawa Ki-77 Army Experimental Long-range Research Plane. Two prototype aircraft were built before the War ended.
place: label: Country of Origin
content: Japan
setName: label: See more items in
content: National Air and Space Museum Collection
creditLine: label: Credit Line
content: Transferred from the U.S. Army Air Forces
dataSource: label: Data Source
content: National Air and Space Museum
identifier: label: Inventory Number
content: A19670084000
objectType: label: Type
content: PROPULSION-Reciprocating & Rotary
objectRights: label: Restrictions & Rights
content: CC0
physicalDescription: label: Materials
content: Steel, Aluminum, Brass, Wood, Textile, Rubber, Magnesium, Paint, Ceramic
label: Dimensions
content: Length 147 cm (57.9 in.), Diameter 115.cm (45.25 in.)