[PAR] [TLE] Kawasaki Ki-61 [SEP] The Kawasaki Ki-61 "Hien" (飛燕, "flying swallow") is a Japanese World War II fighter aircraft used by the Imperial Japanese Army Air Service.  The Japanese Army designation was "Army Type 3 Fighter" (三式戦闘機).  Allied pilots initially believed Ki-61s were Messerschmitt Bf 109s and later an Italian aircraft, which led to the Allied reporting name of "Tony", assigned by the United States War Department.  It was the only mass-produced Japanese fighter of the war to use a liquid-cooled inline V engine.  Over 3,000 Ki-61s were produced.  Initial prototypes saw action over Yokohama during the Doolittle Raid on 18 April 1942, and continued to fly combat missions throughout the war. [PAR] [TLE] Doolittle Raid [SEP] The Doolittle Raid, also known as the Tokyo Raid, on Saturday, April 18, 1942, was an air raid by the United States on the Japanese capital Tokyo and other places on the island of Honshu during World War II, the first air operation to strike the Japanese Home Islands.  It demonstrated that Japan itself was vulnerable to American air attack, served as retaliation for the Japanese attack on Pearl Harbor, and provided an important boost to American morale.  The raid was planned and led by Lieutenant Colonel James "Jimmy" Doolittle of the United States Army Air Forces.
[PAR] [TLE] Kawasaki Ki-61 [ SEP ] The Kawasaki Ki-61 " Hien " ( 飛燕 , " flying swallow " ) is a Japanese World War II fighter aircraft used by the Imperial Japanese Army Air Service . The Japanese Army designation was " Army Type 3 Fighter " ( 三式戦闘機 ) . Allied pilots initially believed Ki-61s were Messerschmitt Bf 109s and later an Italian aircraft , which led to the Allied reporting name of " Tony " , assigned by the United States War Department . It was the only mass - produced Japanese fighter of the war to use a liquid - cooled inline V engine . Over 3,000 Ki-61s were produced . Initial prototypes saw action over Yokohama during the Doolittle Raid on 18 April 1942 , and continued to fly combat missions throughout the war . [PAR] [TLE] Doolittle Raid [ SEP ] The Doolittle Raid , also known as the Tokyo Raid , on Saturday , April 18 , 1942 , was an air raid by the United States on the Japanese capital Tokyo and other places on the island of Honshu during World War II , the first air operation to strike the Japanese Home Islands . It demonstrated that Japan itself was vulnerable to American air attack , served as retaliation for the Japanese attack on Pearl Harbor , and provided an important boost to American morale . The raid was planned and led by Lieutenant Colonel James " Jimmy " Doolittle of the United States Army Air Forces .
What type of engine was used in the planes used in the raid led by Colonel James “Jimmy” Doolittle?
What type of engine was used in the planes used in the raid led by Colonel James “ Jimmy ” Doolittle ?
liquid-cooled inline V engine
liquid-cooled inline V engine