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

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

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 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

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