A license-built version of the German Daimler-Benz DB 601A, this Japanese engine powered the World War II Japanese Aichi M6A1 Serian prototype, Navy Special Attack Bomber, a submarine-borne float aircraft. It also powered early versions of the Yokosuka D4Y2 series Suisei Navy carrier-based dive bomber and reconnaissance aircraft (Allied Code Name Judy).

The Atsuta Model 20 and 30 series engines were the only liquid-cooled engines used operationally by the Japanese Naval Air Force.

 Display Status

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Date Circa World War II Country of Origin Japan Type PROPULSION-Reciprocating & Rotary Manufacturer Aichi Aircraft Company (Aichi Kokuki KK)
 Physical Description Type: Reciprocating, Inverted V, 12 cylinders, Liquid cooled, Supercharged, Fuel injected Power rating: 1,074 kW (1,440 hp) at 2,800 rpm Displacement: 33.9 L (2,069 cu in) (Based on DB 601A) Bore and Stroke: 150 mm (5.9 in.) x 160 mm (6.3 in.) (based on DB 601A) Weight: 715 kg (1,576 lb) Dimensions Length 215.0 cm (84.625 in.), Width 71.2 cm (28. 06 in.), Height 106.0 cm (41.75 in.)(Dimensions for Aichi Atsuta Model 31)
 Materials Ferrous Alloy
Non-Magnetic Metal
Paint
Paper
Wood
Fabric Tape
 Inventory Number A19710929000 Credit Line Transferred from the U.S. Navy Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
For more information, visit the Smithsonians Terms of Use.