The Kawasaki Ha40 , also known as the Army Type 2 1,100 hp Liquid Cooled In-line and Ha-60 , was a license-built Daimler-Benz DB 601Aa 12-cylinder liquid-cooled inverted-vee aircraft engine. The Imperial Japanese Army Air Service (IJAAS) selected the engine to power its Kawasaki Ki-61 fighter.
7-539: The Daimler-Benz DB 601Aa was a development of the earlier DB 600 , with direct fuel injection replacing the carburetor. Like all DB 601s, it had a 33.9-litre displacement. The first prototype with the direct fuel injection was test run in 1935, and an order for 150 engines was placed in February 1937. A manufacturing license was granted to Aichi for the production of this engine for the Imperial Japanese Navy as
14-512: A long drive shaft similar to the American Bell P-39 Airacobra . The gearbox did not combine the power output of the two engines. Instead, the rear engine drove the forward controllable-pitch propeller, while the front engine independently drove the rearward fixed-pitch propeller. Data from Francillon, p.119 Related development Comparable engines Related lists Daimler-Benz DB 600 The Daimler-Benz DB 600
21-651: A narrow-profile fuselage, and the solution that Kawasaki developed was the Ha-201 engine. Although similar to the Aichi Ha-70 , where two Aichi Atsuta engines, mounted side-by-side behind the cockpit driving a single large propeller — an arrangement already used by the Daimler-Benz DB 606 that powered the Heinkel He 119 reconnaissance monoplane prototypes, and later inspired Japan's own Yokosuka R2Y reconnaissance aircraft from
28-739: The Atsuta and to Kawasaki for production of this engine for the IJAAS as the Ha40. Under the 1944 Unified System, this engine was re-designated as the Kawasaki Ha-60. The Kawasaki Ha40 and the Aichi Atsuta were based on the engine that powered Germany's Messerschmitt Bf 109 fighter. A new high-horsepower narrow-profile engine was required for the Kawasaki Ki-64 experimental fighter. The aircraft design called for
35-506: The seventh and eighth He 119 prototypes being sold to Japan in May 1940 — for the Japanese Ki-64, its own powerplant installation design called for the two Kawasaki Ha-40 engines to be separately mounted, one in the aircraft's nose, the other behind the cockpit. The engines were connected to a common gearbox that was mounted in the nose. The rear engine was connected to the nose-mounted gearbox by
42-524: Was fuel injection systems rather than carburettors . Knowing that this would take some years to implement, the RLM permitted that the manufacturers could first design and produce the basic engine, and later develop it to include the injection system. The DB 600 formed this function (having in turn been developed from the Daimler-Benz F4A and F4B V12s), therefore when the injection system was ready it meant that
49-558: Was a German aircraft engine designed and built before World War II as part of a new generation of German engine technology. It was a liquid-cooled inverted V12 engine , and powered the Messerschmitt Bf 110 and Heinkel He 111 among others. Most newer DB engine designs used in WW2 were based on this engine. The RLM made a set of specifications listing the technologies which the new class of German aero-engines required. Among these items
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