The Curtiss P-40 Warhawk was an American single-engine, single-seat, all-metal fighter and ground attack aircraft that first flew in 1938. The Warhawk was used by the air forces of 28 nations, including those of most Allied powers during WWII, and remained in front-line service until the end of the war. It was the third most-produced American fighter, after the P-51 and P-47; 13,738 were built, all at Curtiss-Wright Corporation's main production facilities at Buffalo, NY.
Warhawk was the name the USAAF adopted for all models, making it the official name in the USA for all P-40s. The British Commonwealth and Soviet air forces used the name Tomahawk for models equivalent to the 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 N African campaigns, during June 1941. No. 112 Squadron RAF was among the first to operate Tomahawks, in N Africa.
The P-40's lack of a two-stage 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 NW Europe. Between 1941 and 1944, however, the P-40 played a critical role with Allied air forces in three major theatres: N Africa, the SW Pacific and China. It also had a significant role in the Middle East, SE Asia, E Europe, Alaska and Italy.
The P-40 had good agility, especially at high speed and medium to low altitude. It was one of the tightest-turning monoplane fighters of the war, although at lower speeds it could not out-turn the extremely manoeuvrable Japanese fighters such as the A6M Zero and Nakajima Ki-43 Oscar.
Climb performance was fair to poor, depending on the subtype. Dive acceleration was good and dive speed was excellent. The highest-scoring P-40 ace, Clive Caldwell (RAAF), who claimed 22 of his 28½ kills in the type, said that the P-40 had "almost no vices", although "it was a little difficult to control in terminal velocity". Caldwell added that the P-40 was "faster downhill than almost any other aeroplane with a propeller."
The P-40 tolerated harsh conditions in the widest possible variety of climates. It was a semi-modular design and thus easy to maintain in the field. It lacked innovations of the time, such as boosted ailerons or automatic leading edge slats, but it had a strong structure including a five-spar wing, which enabled P-40s to survive some mid-air collisions: both accidental impacts and intentional ramming attacks against enemy aircraft were occasionally recorded as victories by the Desert Air Force and Soviet Air Forces. Caldwell said P-40s "would take a tremendous amount of punishment, violent aerobatics as well as enemy action." Caldwell found the P-40C Tomahawk's armament of two .50 in machine guns firing through the prop and two .303 Browning machine guns in each wing to be inadequate. This was rectified with the P-40E Kittyhawk (above), which had three .50 in guns in each wing, although Caldwell preferred the Tomahawk in other respects. It had armour around the engine and the cockpit, which enabled it to withstand considerable damage. This was one of the characteristics that allowed Allied pilots in Asia and the Pacific to attack Japanese fighters head on, rather than try to out-turn and out-climb their opponents. Late-model P-40s were regarded as well armoured. Visibility was adequate, although hampered by an overly complex windscreen frame, and completely blocked to the rear in early models due to the raised turtledeck. Poor ground visibility and the relatively narrow landing gear track led to many losses due to accidents on the ground.
The Kittyhawk was the main fighter used by the RAAF in WWII, 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 theatre.
Many RAAF pilots achieved high scores in the P-40. At least five reached "double ace" status: Clive Caldwell, Nicky Barr, John Waddy, Bob Whittle (11 kills each) and Bobby Gibbes (10 kills) in the Middle East, N African and/or New Guinea campaigns. In all, 18 RAAF pilots became aces while flying P-40s.
Nicky Barr, like many Australian pilots, considered the P-40 a reliable mount: "The Kittyhawk became, to me, a friend. It was quite capable of getting you out of trouble more often than not. It was a real warhorse."
At the same time as the heaviest fighting in N 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 US 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; the P-40 was given the RAAF designation A-29. RAAF Kittyhawks played a crucial role in the SW Pacific theatre. 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) 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, 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.
The RAAF units which made the most use of Kittyhawks in the SW Pacific were: 75, 76, 77, 78, 80, 82, 84 and 86 Squadrons. These squadrons saw action mostly in the New Guinea and Borneo campaigns.
Late in 1945, RAAF fighter squadrons in the SW 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 N 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 SW Pacific). The P-40 was retired by the RAAF in 1947. - From Wikipedia.
The example above, A29-133 "Polly" operated out of Milne Bay in 1942-43 and is seen in the Australian War Museum in Canberra.