Aichi Atsuta 31, Ha 60 Model 31, V-12 Engine

The Aichi Watch and Electric Machinery Company of Japan was established in 1899, and first built Lorraine engines for the Japanese navy under license. In 1931 it began manufacturing its own designs in 1931. The name Atsuta was derived from its factory.

The Atsuta 31 was a licensed version of the Daimler-Benz DB 601A liquid-cooled, inverted V-12 engine. The Atsuta reduced an aircraft's frontal area, increasing aerodynamic efficiency. Aichi manufactured 873 Atsuta series engines during World War II.

The Atsuta was the only liquid-cooled engine used operationally by the Japanese naval air force. The Ha 60 Model 31 powered the Aichi M6A1 Seiran, a submarine-borne floatplane bomber, and early versions of the Yokosuka D4Y2 series Suisei carrier-based dive bomber and reconnaissance aircraft.

Transferred from the U.S. Navy, Naval Supply Center, Norfolk, Virginia.

Physical Description:
Weight: 715 kg (1,576 lb)

Country of Origin
Japan

Manufacturer
Aichi Aircraft Company (Aichi Kokuki KK)
Designer
Daimler-Benz Aktiengesellschaft

Date
1945

Location
Steven F. Udvar-Hazy Center, Chantilly, VA
Hangar
Boeing Aviation Hangar

Type
PROPULSION-Reciprocating & Rotary

Materials
Bearings - Steel backed copper lead
Crankshaft - Ni/Cr Steel
Cylinder blocks - Silicon aluminum alloy
Ignition leads - Fabric covered
Pistons - Similar to 24S aluminum
Dimensions
Length 215.0 cm (84 5/8 in.), Width 71.2 cm (28 1/16 in.), Height 106.0 cm (41 3/4 in.)

The Aichi Watch and Electric Machinery Company of Japan was established in 1899, and first built Lorraine engines for the Japanese navy under license. In 1931 it began manufacturing its own designs in 1931. The name Atsuta was derived from its factory.

The Atsuta 31 was a licensed version of the Daimler-Benz DB 601A liquid-cooled, inverted V-12 engine. The Atsuta reduced an aircraft's frontal area, increasing aerodynamic efficiency. Aichi manufactured 873 Atsuta series engines during World War II.

The Atsuta was the only liquid-cooled engine used operationally by the Japanese naval air force. The Ha 60 Model 31 powered the Aichi M6A1 Seiran, a submarine-borne floatplane bomber, and early versions of the Yokosuka D4Y2 series Suisei carrier-based dive bomber and reconnaissance aircraft.

Transferred from the U.S. Navy, Naval Supply Center, Norfolk, Virginia.

Physical Description:
Weight: 715 kg (1,576 lb)

Country of Origin
Japan

Manufacturer
Aichi Aircraft Company (Aichi Kokuki KK)
Designer
Daimler-Benz Aktiengesellschaft

Date
1945

Location
Steven F. Udvar-Hazy Center, Chantilly, VA
Hangar
Boeing Aviation Hangar

Type
PROPULSION-Reciprocating & Rotary

Materials
Bearings - Steel backed copper lead
Crankshaft - Ni/Cr Steel
Cylinder blocks - Silicon aluminum alloy
Ignition leads - Fabric covered
Pistons - Similar to 24S aluminum
Dimensions
Length 215.0 cm (84 5/8 in.), Width 71.2 cm (28 1/16 in.), Height 106.0 cm (41 3/4 in.)

ID: A19710927000