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The Curtiss P-40 Warhawk is an American single-engined, single-seat, all-metal fighter and ground-attack aircraft that first flew in 1938. The P-40 design was a modification of the previous Curtiss P-36 Hawk which reduced development time and enabled a rapid entry into production and operational service. The Warhawk was used by most Allied powers during World War II, and remained in frontline service until the end of the war. It was the third most-produced American fighter of World War II, after the P-51 and P-47; by November 1944, when production of the P-40 ceased, 13,738 had been built, all at Curtiss-Wright Corporation's main production facilities at Buffalo, New York.
P-40 Warhawk was the name the United States Army Air Corps gave the plane, and after June 1941, the USAAF adopted the name for all models, making it the official name in the U.S. for all P-40s. The British Commonwealth and Soviet air forces used the name Tomahawk for models equivalent to the original P-40, P-40B, and P-40C, and the name Kittyhawk for models equivalent to the P-40D and all later variants.
P-40s first saw combat with the British Commonwealth squadrons of the Desert Air Force in the Middle East and North African campaigns, during June 1941. No. 112 Squadron Royal Air Force, was among the first to operate Tomahawks in North Africa and the unit was the first Allied military aviation unit to feature the "shark mouth" logo, copying similar markings on some Luftwaffe Messerschmitt Bf 110 twin-engine fighters.
The P-40's lack of a two-speed supercharger made it inferior to Luftwaffe fighters such as the Messerschmitt Bf 109 or the Focke-Wulf Fw 190 in high-altitude combat and it was rarely used in operations in Northwest Europe. However, between 1941 and 1944, the P-40 played a critical role with Allied air forces in three major theaters: North Africa, the Southwest Pacific, and China. It also had a significant role in the Middle East, Southeast Asia, Eastern Europe, Alaska and Italy. The P-40's performance at high altitudes was not as important in those theaters, where it served as an air superiority fighter, bomber escort and fighter-bomber. Although it gained a postwar reputation as a mediocre design, suitable only for close air support, more recent research including scrutiny of the records of individual Allied squadrons indicates that this was not the case: the P-40 performed surprisingly well as an air superiority fighter, at times suffering severe losses, but also inflicting a very heavy toll on enemy aircraft. Based on war-time victory claims, over 200 Allied fighter pilots – from the UK, Australia, New Zealand, Canada, South Africa, the US and the Soviet Union – became aces flying the P-40. These included at least 20 double aces, mostly over North Africa, China, Burma and India, the South West Pacific and Eastern Europe. The P-40 offered the additional advantages of low cost and durability, which kept it in production as a ground-attack aircraft long after it was obsolescent as a fighter.
P-40M
P-40M version generally similar to the P-40K, with a stretched fuselage like the P-40L and powered by an Allison V-1710-81 engine giving better performance at altitude (compared to previous Allison versions). It had some detail improvements and it was characterized by two small air scoops just before the exhaust pipes. Most of them were supplied to Allied countries (mainly UK and USSR), while some others remained in the US for advanced training. It was also supplied to the Commonwealth air forces as the Kittyhawk Mk. III.
Royal Australian Air Force
The Kittyhawk was the main fighter used by the RAAF in World War II, in greater numbers than the Spitfire. Two RAAF squadrons serving with the Desert Air Force, No. 3 and No. 450 Squadrons, were the first Australian units to be assigned P-40s. Other RAAF pilots served with RAF or SAAF P-40 squadrons in the theater.
At the same time as the heaviest fighting in North Africa, the Pacific War was also in its early stages, and RAAF units in Australia were completely lacking in suitable fighter aircraft. Spitfire production was being absorbed by the war in Europe; P-38s were trialled, but were difficult to obtain; Mustangs had not yet reached squadrons anywhere, and Australia's tiny and inexperienced aircraft industry was geared towards larger aircraft. USAAF P-40s and their pilots originally intended for the U.S. Far East Air Force in the Philippines, but diverted to Australia as a result of Japanese naval activity were the first suitable fighter aircraft to arrive in substantial numbers. By mid-1942, the RAAF was able to obtain some USAAF replacement shipments.
RAAF Kittyhawks played a crucial role in the South West Pacific theater. They fought on the front line as fighters during the critical early years of the Pacific War, and the durability and bomb-carrying abilities (1,000 lb/454 kg) of the P-40 also made it ideal for the ground attack role. For example, 75, and 76 Squadrons played a critical role during the Battle of Milne Bay,[77][78] fending off Japanese aircraft and providing effective close air support for the Australian infantry, negating the initial Japanese advantage in light tanks and sea power.
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Late in 1945, RAAF fighter squadrons in the South West Pacific began converting to P-51Ds. However, Kittyhawks were in use with the RAAF until the end of the war, in Borneo. In all, the RAAF acquired 841 Kittyhawks (not counting the British-ordered examples used in North Africa), including 163 P-40E, 42 P-40K, 90 P-40 M and 553 P-40N models. In addition, the RAAF ordered 67 Kittyhawks for use by No. 120 (Netherlands East Indies) Squadron (a joint Australian-Dutch unit in the South West Pacific). The P-40 was retired by the RAAF in 1947.