An elliptical wing is a wing planform whose leading and trailing edges each approximate two segments of an ellipse . It is not to be confused with annular wings , which may be elliptically shaped.
142-499: The Republic P-47 Thunderbolt is a World War II-era fighter aircraft produced by the American company Republic Aviation from 1941 through 1945. It was a successful high-altitude fighter, and it also served as the foremost American fighter-bomber in the ground-attack role. Its primary armament was eight .50-caliber machine guns , and it could carry 5-inch rockets or a bomb load of 2,500 lb (1,100 kg). When fully loaded,
284-550: A bomber escort mission, 2nd Lt. William E. Roach of 358th Fighter Squadron , 355th Fighter Group made an emergency landing on a German airfield. Roach was imprisoned at Stalag Luft I . The Thunderbolt was given German markings. After World War II, the Chinese Nationalist Air Force received 102 P-47Ds used during the Chinese Civil War . The Chinese Communists captured five P-47Ds from
426-584: A by now mediocre performance. The first Eindecker victory came on 1 July 1915, when Leutnant Kurt Wintgens , of Feldflieger Abteilung 6 on the Western Front, downed a Morane-Saulnier Type L. His was one of five Fokker M.5 K/MG prototypes for the Eindecker , and was armed with a synchronized aviation version of the Parabellum MG14 machine gun. The success of the Eindecker kicked off
568-470: A cadre of exceptional pilots. In the United Kingdom, at the behest of Neville Chamberlain (more famous for his 'peace in our time' speech), the entire British aviation industry was retooled, allowing it to change quickly from fabric covered metal framed biplanes to cantilever stressed skin monoplanes in time for the war with Germany, a process that France attempted to emulate, but too late to counter
710-435: A competitive cycle of improvement among the combatants, both sides striving to build ever more capable single-seat fighters. The Albatros D.I and Sopwith Pup of 1916 set the classic pattern followed by fighters for about twenty years. Most were biplanes and only rarely monoplanes or triplanes . The strong box structure of the biplane provided a rigid wing that allowed the accurate control essential for dogfighting. They had
852-443: A difficult deflection shot. The first step in finding a real solution was to mount the weapon on the aircraft, but the propeller remained a problem since the best direction to shoot is straight ahead. Numerous solutions were tried. A second crew member behind the pilot could aim and fire a swivel-mounted machine gun at enemy airplanes; however, this limited the area of coverage chiefly to the rear hemisphere, and effective coordination of
994-539: A fast mail plane and reconnaissance bomber , the Heinkel He 70 "Blitz", which had the elliptical wing. It proved to have excellent performance for the era, establishing eight world records relating to speed over distance, having reportedly attained a maximum speed of {377 km/h (234 mph). Shortly thereafter, Heinkel developed the He 111 bomber, which made its first flight on 24 February 1935. In comparison to
1136-552: A form that would replace all others in the 1930s. As collective combat experience grew, the more successful pilots such as Oswald Boelcke , Max Immelmann , and Edward Mannock developed innovative tactical formations and maneuvers to enhance their air units' combat effectiveness. Allied and – before 1918 – German pilots of World War I were not equipped with parachutes , so in-flight fires or structural failures were often fatal. Parachutes were well-developed by 1918 having previously been used by balloonists, and were adopted by
1278-534: A four-bladed Curtiss Electric constant-speed propeller of 146 in (3.7 m) in diameter. The loss of the AP-4 prototype to an engine fire ended Kartveli's experiments with tight-fitting cowlings , so the engine was placed in a broad cowling that opened at the front in a "horse collar"-shaped ellipse. The cowling admitted cooling air for the engine, left and right oil coolers, and the turbosupercharger intercooler system. The engine exhaust gases were routed into
1420-664: A great deal of ground-attack work. In World War II, the USAAF and RAF often favored fighters over dedicated light bombers or dive bombers , and types such as the Republic P-47 Thunderbolt and Hawker Hurricane that were no longer competitive as aerial combat fighters were relegated to ground attack. Several aircraft, such as the F-111 and F-117, have received fighter designations though they had no fighter capability due to political or other reasons. The F-111B variant
1562-527: A more powerful engine, as well as on the AP-10 fighter design. The latter was a lightweight aircraft powered by the Allison V-1710 liquid-cooled V-12 engine and armed with two .50 in (12.7 mm) M2 Browning machine guns mounted in the nose and four .30 in (7.62 mm) M1919 Browning machine guns mounted in the wings. The United States Army Air Corps (USAAC) backed the project and gave it
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#17327661427361704-828: A nickname: "Jug" (because its profile was similar to that of a common milk jug of the time). Two fighter groups already stationed in England began introducing the Jugs in January 1943 - the Spitfire -flying 4th Fighter Group , a unit built around a core of experienced American pilots who had flown in the RAF Eagle Squadrons prior to the US entry in the war; and the 78th Fighter Group , formerly flying P-38 Lightnings . Beginning in January 1943, Thunderbolt fighters were sent to
1846-591: A number of Thunderbolts have survived to the present day, and a few are still flying. The Cuban Air Force took delivery of 29 ex-USAF airframes and spares. By the late 1950s, the F-47 was considered long obsolete as a fighter, but was well suited for counter-insurgency tasks. P-47s were operated by several Allied air arms during World War II. The RAF received 240 razorback P-47Ds, which they designated Thunderbolt Mark I, and 590 bubbletop P-47D-25s, designated Thunderbolt Mark IIs. With no need for another high-altitude fighter,
1988-431: A number of twin-engine fighters were built; however they were found to be outmatched against single-engine fighters and were relegated to other tasks, such as night fighters equipped with radar sets. By the end of the war, turbojet engines were replacing piston engines as the means of propulsion, further increasing aircraft speed. Since the weight of the turbojet engine was far less than a piston engine, having two engines
2130-469: A pair of wastegate -equipped pipes that ran along each side of the cockpit to drive the turbosupercharger turbine at the bottom of the fuselage , about halfway between cockpit and tail. At full power, the pipes glowed red at their forward ends and the turbine spun at 21,300 rpm. The complicated turbosupercharger system with its ductwork gave the XP-47B a deep fuselage, and the wings had to be mounted in
2272-550: A part of military nomenclature, a letter is often assigned to various types of aircraft to indicate their use, along with a number to indicate the specific aircraft. The letters used to designate a fighter differ in various countries. In the English-speaking world, "F" is often now used to indicate a fighter (e.g. Lockheed Martin F-35 Lightning II or Supermarine Spitfire F.22 ), though "P" used to be used in
2414-638: A range of specialized aircraft types. Some of the most expensive fighters such as the US Grumman F-14 Tomcat , McDonnell Douglas F-15 Eagle , Lockheed Martin F-22 Raptor and Russian Sukhoi Su-27 were employed as all-weather interceptors as well as air superiority fighter aircraft, while commonly developing air-to-ground roles late in their careers. An interceptor is generally an aircraft intended to target (or intercept) bombers and so often trades maneuverability for climb rate. As
2556-529: A relatively high position. This was difficult, since long-legged main landing gear struts were needed to provide ground clearance for the enormous propeller. To reduce the size and weight of the undercarriage struts, and so wing-mounted machine guns could be fitted, each strut was fitted with a mechanism by which it telescoped out 9 in (23 cm) while it extended. The XP-47B was very heavy compared with contemporary single-engined fighters, with an empty weight of 9,900 lb (4,500 kg), or 65% more than
2698-742: A result, during the early months of these campaigns, Axis air forces destroyed large numbers of Red Air Force aircraft on the ground and in one-sided dogfights. In the later stages on the Eastern Front, Soviet training and leadership improved, as did their equipment. By 1942 Soviet designs such as the Yakovlev Yak-9 and Lavochkin La-5 had performance comparable to the German Bf 109 and Focke-Wulf Fw 190 . Also, significant numbers of British, and later U.S., fighter aircraft were supplied to aid
2840-411: A semi-elliptical wing shape to solve two conflicting requirements; the wing needed to be thin to allow a high critical Mach number but it had to be thick enough to house the retractable undercarriage, armament, and ammunition. An elliptical planform is the most efficient aerodynamic shape for an untwisted wing, leading to the lowest amount of induced drag . The semi-elliptical planform was skewed so that
2982-643: A separate (and vulnerable) radiator, but had increased drag. Inline engines often had a better power-to-weight ratio . Some air forces experimented with " heavy fighters " (called "destroyers" by the Germans). These were larger, usually twin-engined aircraft, sometimes adaptations of light or medium bomber types. Such designs typically had greater internal fuel capacity (thus longer range) and heavier armament than their single-engine counterparts. In combat, they proved vulnerable to more agile single-engine fighters. The primary driver of fighter innovation, right up to
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#17327661427363124-420: A single operator, who flew the aircraft and also controlled its armament. They were armed with one or two Maxim or Vickers machine guns, which were easier to synchronize than other types, firing through the propeller arc. Gun breeches were in front of the pilot, with obvious implications in case of accidents, but jams could be cleared in flight, while aiming was simplified. The use of metal aircraft structures
3266-533: A total of 445 missions from November 1944 to May 1945 over northern Italy and Central Europe, with 15 P-47s lost to German flak and five pilots being killed in action. In the early 1980s, this unit was awarded the " Presidential Unit Citation " by the American government in recognition for its achievements in World War II. From March 1945 to the end of the war in the Pacific—as Mexico had declared war on
3408-402: Is a fast, heavily armed and long-range type, able to act as an escort fighter protecting bombers , to carry out offensive sorties of its own as a penetration fighter and maintain standing patrols at significant distance from its home base. Bombers are vulnerable due to their low speed, large size and poor maneuvrability. The escort fighter was developed during World War II to come between
3550-549: Is able to defend itself while conducting attack sorties. The word "fighter" was first used to describe a two-seat aircraft carrying a machine gun (mounted on a pedestal) and its operator as well as the pilot . Although the term was coined in the United Kingdom, the first examples were the French Voisin pushers beginning in 1910, and a Voisin III would be the first to shoot down another aircraft, on 5 October 1914. However at
3692-623: Is known as an interceptor . Recognized classes of fighter include: Of these, the Fighter-bomber , reconnaissance fighter and strike fighter classes are dual-role, possessing qualities of the fighter alongside some other battlefield role. Some fighter designs may be developed in variants performing other roles entirely, such as ground attack or unarmed reconnaissance . This may be for political or national security reasons, for advertising purposes, or other reasons. The Sopwith Camel and other "fighting scouts" of World War I performed
3834-775: The Air National Guard (ANG) until 1953. F-47s served as spotters for rescue aircraft such as the OA-10 Catalina and Boeing B-17H . In 1950, F-47 Thunderbolts were used to suppress the declaration of independence in Puerto Rico by nationalists during the Jayuya Uprising . The F-47 was not deployed to Korea for the Korean War . The North American F-51 (P-51) Mustang was used by the USAF, mainly in
3976-598: The Algerian War of Independence . After World War II, the Italian Air Force (AMI) received 75 P-47D-25s sent to 5˚ Stormo , and 99 to the 51˚. These machines were delivered between 1947 and 1950. However, they were not well liked, as the Italian pilots were used to much lighter aircraft and found the controls too heavy. Nevertheless, the stability, payload, and high speed were appreciated. Most importantly,
4118-562: The Combined Bomber Offensive . Unescorted Consolidated B-24 Liberators and Boeing B-17 Flying Fortress bombers, however, proved unable to fend off German interceptors (primarily Bf 109s and Fw 190s). With the later arrival of long range fighters, particularly the North American P-51 Mustang , American fighters were able to escort far into Germany on daylight raids and by ranging ahead attrited
4260-842: The Grumman F6F Hellcat and the Vought F4U Corsair . An advanced turbosupercharger system ensured the aircraft's eventual dominance at high altitudes, while also influencing its size and design. The P-47 was one of the main United States Army Air Forces (USAAF) fighters of World War II. It also served with other Allied air forces, including those of France , the United Kingdom , and the Soviet Union , as well as Allied Mexican and Brazilian squadrons . The armored cockpit
4402-585: The Junkers D.I , made with corrugated duralumin , all based on his experience in creating the pioneering Junkers J 1 all-metal airframe technology demonstration aircraft of late 1915. While Fokker would pursue steel tube fuselages with wooden wings until the late 1930s, and Junkers would focus on corrugated sheet metal, Dornier was the first to build a fighter (the Dornier-Zeppelin D.I ) made with pre-stressed sheet aluminum and having cantilevered wings,
Republic P-47 Thunderbolt - Misplaced Pages Continue
4544-510: The RAF and the USAAF against German industry intended to wear down the Luftwaffe. Axis fighter aircraft focused on defending against Allied bombers while Allied fighters' main role was as bomber escorts. The RAF raided German cities at night, and both sides developed radar-equipped night fighters for these battles. The Americans, in contrast, flew daylight bombing raids into Germany delivering
4686-588: The Sopwith Tabloid and Bristol Scout . The French and the Germans didn't have an equivalent as they used two seaters for reconnaissance, such as the Morane-Saulnier L , but would later modify pre-war racing aircraft into armed single seaters. It was quickly found that these were of little use since the pilot couldn't record what he saw while also flying, while military leaders usually ignored what
4828-608: The Soviet Air Forces (VVS) via Alaska in March 1944. Two of them were tested in April–May 1944. Test pilot Aleksey N. Grinchik noted the spacious cockpit with good ventilation and a good all-around view. He found it easy to fly and stable upon take-off and landing, but it showed excessive rolling stability and poor directional stability. Soviet engineers disassembled the third aircraft to examine its construction. They appreciated
4970-792: The Stangensteuerung in German, for "pushrod control system") devised by the engineers of Anthony Fokker 's firm was the first system to enter service. It would usher in what the British called the " Fokker scourge " and a period of air superiority for the German forces, making the Fokker Eindecker monoplane a feared name over the Western Front , despite its being an adaptation of an obsolete pre-war French Morane-Saulnier racing airplane, with poor flight characteristics and
5112-439: The pitot tube at high speeds, airspeed readings became unpredictably exaggerated. As P-47s were able to out-dive enemy fighter planes attempting to escape by such a maneuver, German pilots gradually learned to avoid diving away from a P-47. Kurt Bühligen , a high-scoring German fighter ace with 112 victories, recalled: The P-47 was very heavy, too heavy for some maneuvers. We would see it coming from behind, and pull up fast, and
5254-544: The planform would be made. The first aircraft to use the elliptical wing was the Bäumer Sausewind , a German light sports aircraft that performed its maiden flight on 26 May 1925. Its designers, the Günther brothers, later joined the German aircraft manufacturer Heinkel to apply their designs, including the elliptical wing, to several projects undertaken by the firm. During the early 1930s, Heinkel developed
5396-596: The (Fw) 190 held an overall edge against it. The P-47's initial success in combat was primarily due to tactics, using rolls (the P-47 had an excellent roll rate) and energy-saving dive and zoom climbs from high altitude to outmaneuver German fighters. Both the Bf 109 and Fw 190 could, like the Spitfire, out-turn and out-climb the early model P-47s at low to medium altitudes, since these early P-47s had mediocre climb performance due to
5538-492: The 1930s and 1940s. Perhaps the most famous aircraft to feature an elliptical wing is the Supermarine Spitfire , a Second World War -era British fighter aircraft. Another example was the Heinkel He 70 "Blitz", a German fast mail plane and reconnaissance bomber ; early versions of the He 111 bomber also used such a wing configuration before a simpler design was adopted for economic reasons. Theoretically,
5680-754: The 4th FG scoring the Thunderbolt's first air victory (against a Focke-Wulf Fw 190 ). By mid-1943, the Jug was also in service with the 12th Air Force in Italy and against the Japanese in the Pacific, with the 348th Fighter Group flying missions out of Port Moresby , New Guinea. By 1944, the Thunderbolt was in combat with the USAAF in all its operational theaters except Alaska. Luftwaffe ace Heinz Bär said that
5822-504: The 4th had the fewest kills of any of the first three P-47 squadrons in Europe. U.S. ace Jim Goodson , who had flown Spitfires with the RAF and flew a P-47 in 1943, at first shared the skepticism of other pilots for their "seven-ton milk bottles", but Goodson learned to appreciate the P-47's potential: There were many U.S. pilots who preferred the P-47 to anything else; they do not agree that
Republic P-47 Thunderbolt - Misplaced Pages Continue
5964-649: The Axis on May 22, 1942—the Mexican Escuadrón Aéreo de Pelea 201 ( 201st Fighter Squadron ) operated P-47Ds as part of the U.S. 5th Air Force in the Philippines . In 791 sorties against Japanese forces, the 201st lost no pilots or aircraft to enemy action. The Free French Air Forces received 446 P-47Ds from 1943. These aircraft saw extensive action in France and Germany and again in the 1950s during
6106-668: The British Royal Flying Corps and Royal Air Force referred to them as " scouts " until the early 1920s, while the U.S. Army called them "pursuit" aircraft until the late 1940s (using the designation P, as in Curtiss P-40 Warhawk , Republic P-47 Thunderbolt and Bell P-63 Kingcobra ). The UK changed to calling them fighters in the 1920s , while the US Army did so in the 1940s. A short-range fighter designed to defend against incoming enemy aircraft
6248-639: The British, the Americans, the Spanish (in the Spanish civil war) and the Germans. Given limited budgets, air forces were conservative in aircraft design, and biplanes remained popular with pilots for their agility, and remained in service long after they ceased to be competitive. Designs such as the Gloster Gladiator , Fiat CR.42 Falco , and Polikarpov I-15 were common even in the late 1930s, and many were still in service as late as 1942. Up until
6390-660: The Chinese Nationalist forces. In 1948, the Chinese Nationalists employed 70 P-47Ds and 42 P-47Ns brought to Taiwan in 1952. P-47s were used extensively in aerial clashes over the Taiwan Strait between Nationalist and Communist aircraft. Initial response to the P-47 praised its dive speed and high-altitude performance, while criticizing its turning performance and rate of climb (particularly at low to medium altitudes). The turbosupercharger in
6532-585: The Dutch attempts to reassert control of Batavia . Those squadrons not disbanded outright after the war re-equipped with British-built aircraft such as the Hawker Tempest . During the Italian campaign , the "1º Grupo de Caça da Força Aérea Brasileira" (Brazilian Air Force 1st Fighter Squadron) flew a total of 48 P-47Ds in combat (of a total of 67 received, 19 of which were backup aircraft). This unit flew
6674-587: The European battlefield, played a crucial role in the eventual defeat of the Axis, which Reichmarshal Hermann Göring , commander of the German Luftwaffe summed up when he said: "When I saw Mustangs over Berlin, I knew the jig was up." Elliptical wing Relatively few aircraft have adopted the elliptical wing, an even-smaller number of which attained mass production ; the majority of aircraft that did use this feature were introduced during
6816-483: The German flying services during the course of that year. The well known and feared Manfred von Richthofen , the "Red Baron", was wearing one when he was killed, but the allied command continued to oppose their use on various grounds. In April 1917, during a brief period of German aerial supremacy a British pilot's average life expectancy was calculated to average 93 flying hours, or about three weeks of active service. More than 50,000 airmen from both sides died during
6958-500: The German invasion. The period of improving the same biplane design over and over was now coming to an end, and the Hawker Hurricane and Supermarine Spitfire started to supplant the Gloster Gladiator and Hawker Fury biplanes but many biplanes remained in front-line service well past the start of World War II. While not a combatant in Spain, they too absorbed many of the lessons in time to use them. The Spanish Civil War also provided an opportunity for updating fighter tactics. One of
7100-420: The He 70, it was a larger aircraft that masqueraded as a civil airliner despite having been developed from conception to provide the nascent Luftwaffe with a fast medium bomber ; this deception was due to restrictions placed on Germany after the First World War over the development or deployment of bomber aircraft. Despite the type being produced in vast numbers before and during the Second World War , only
7242-414: The Italians developed several monoplanes such as the Fiat G.50 Freccia , but being short on funds, were forced to continue operating obsolete Fiat CR.42 Falco biplanes. From the early 1930s the Japanese were at war against both the Chinese Nationalists and the Russians in China, and used the experience to improve both training and aircraft, replacing biplanes with modern cantilever monoplanes and creating
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#17327661427367384-642: The Japanese Nakajima Ki-27 , Nakajima Ki-43 and Mitsubishi A6M Zero and the Italian Fiat G.50 Freccia and Macchi MC.200 . In contrast, designers in the United Kingdom, Germany, the Soviet Union, and the United States believed that the increased speed of fighter aircraft would create g -forces unbearable to pilots who attempted maneuvering dogfights typical of the First World War, and their fighters were instead optimized for speed and firepower. In practice, while light, highly maneuverable aircraft did possess some advantages in fighter-versus-fighter combat, those could usually be overcome by sound tactical doctrine, and
7526-463: The Japanese breakout attempt at the Sittang Bend in the final months of the war. The Thunderbolts were armed with three 500 lb (230 kg) bombs or, in some cases, British "60 lb (27 kg)" RP-3 rocket projectiles. Long-range fuel tanks gave five hours of endurance. Thunderbolts flew escort for RAF Liberators in the bombing of Rangoon. Thunderbolts remained in RAF service until October 1946. Postwar RAF Thunderbolts were used in support of
7668-509: The Luftwaffe to establish control of the skies over Western Europe. By the time of Operation Overlord in June 1944, the Allies had gained near complete air superiority over the Western Front. This cleared the way both for intensified strategic bombing of German cities and industries, and for the tactical bombing of battlefield targets. With the Luftwaffe largely cleared from the skies, Allied fighters increasingly served as ground attack aircraft. Allied fighters, by gaining air superiority over
7810-420: The Luftwaffe, and while the Luftwaffe maintained a qualitative edge over the Red Air Force for much of the war, the increasing numbers and efficacy of the Soviet Air Force were critical to the Red Army's efforts at turning back and eventually annihilating the Wehrmacht . Meanwhile, air combat on the Western Front had a much different character. Much of this combat focused on the strategic bombing campaigns of
7952-410: The P-47 "could absorb an astounding amount of lead [from shooting at it] and had to be handled very carefully". Although the North American P-51 Mustang replaced the P-47 in the long-range escort role in Europe, the Thunderbolt still ended the war with an aerial kill ratio of 4.6:1 in over 746,000 sorties of all types, at the cost of 3,499 P-47s to all causes in combat. By the end of the war, the 56th FG
8094-600: The P-47 couldn't follow and we came around and got on its tail in this way. Other positive attributes included the P-47's ruggedness; its radial piston engine had a high tolerance for damage compared to liquid-cooled engines, while its large size meant it could sustain a large amount of damage and still be able to get its pilot back to base. With eight .50 in (12.7 mm) machine guns, the P-47 carried more firepower than other single-engined American fighters. P-47 pilots claimed 20 Luftwaffe Messerschmitt Me 262 jet fighters and four Arado Ar 234 jet bombers in aerial combat. In
8236-496: The P-47 gave the powerplant its maximum power at 27,000 ft (8,200 m), and in the thin air above 30,000 ft (9,100 m), the Thunderbolt remained fast and nimble compared to other aircraft. The P-47 first saw action with the 4th Fighter Group, whose pilots were mainly drawn from the three British Eagle Squadrons , who had previously flown the British Spitfire Mark V, a much smaller and much more slender aircraft. At first, they viewed their new fighter with misgivings. It
8378-423: The P-47 served as an excellent transition platform to heavier jet fighters, including the F-84 Thunderjet , starting in 1953. The type was provided to many Latin American air forces, some of which operated it into the 1960s. Small numbers of P-47s were also provided to China, Iran , Turkey , and Yugoslavia . In mid-1943, the Soviet high command showed an interest in the P-47B. Three P-47D-10-REs were ferried to
8520-439: The P-47 weighed up to 8 tons, making it one of the heaviest fighters of the war. The Thunderbolt was effective as a short- to medium-range escort fighter in high- altitude air-to-air combat and ground attack in both the European and Pacific theaters. The P-47 was designed around the powerful Pratt & Whitney R-2800 Double Wasp 18-cylinder radial engine , which also powered two U.S. Navy /U.S. Marine Corps fighters,
8662-455: The P-47D could carry 1,000 lb (450 kg) bombs and M8 4.5 in (115 mm) rockets under their wings or from the last version of the P-47D in 1944, 5 in (130 mm) High Velocity Aircraft Rockets (HVARs, also known as "Holy Moses"). From D-Day until VE day, Thunderbolt pilots claimed to have destroyed 86,000 railroad cars , 9,000 locomotives , 6,000 armored fighting vehicles , and 68,000 trucks. During Operation Cobra , in
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#17327661427368804-412: The Pacific, Colonel Neel E. Kearby of the Fifth Air Force claimed 22 Japanese aircraft and was awarded the Medal of Honor for an action in which he downed six enemy fighters on a single mission. He was shot down and killed over Wewak in March 1944. The P-47 proved to be a formidable fighter-bomber due to its good armament, heavy bomb load, and ability to survive enemy fire. The P-47's survivability
8946-480: The RAF adapted their Thunderbolts for ground attack, a task for which the type was well suited. Once the Thunderbolts were cleared for use in 1944, they were used against the Japanese in Burma by 16 RAF squadrons of the South East Asia Command from India . Operations with army support (operating as " cab ranks " to be called in when needed), attacks on enemy airfields and lines of communication, and escort sorties. They proved devastating in tandem with Spitfires during
9088-419: The Soviet Polikarpov I-16 . The later German design was earlier in its design cycle, and had more room for development and the lessons learned led to greatly improved models in World War II. The Russians failed to keep up and despite newer models coming into service, I-16s remaining the most common Soviet front-line fighter into 1942 despite being outclassed by the improved Bf 109s in World War II. For their part,
9230-419: The Soviet war effort as part of Lend-Lease , with the Bell P-39 Airacobra proving particularly effective in the lower-altitude combat typical of the Eastern Front. The Soviets were also helped indirectly by the American and British bombing campaigns, which forced the Luftwaffe to shift many of its fighters away from the Eastern Front in defense against these raids. The Soviets increasingly were able to challenge
9372-451: The US for pursuit (e.g. Curtiss P-40 Warhawk ), a translation of the French "C" ( Dewoitine D.520 C.1 ) for Chasseur while in Russia "I" was used for Istrebitel , or exterminator ( Polikarpov I-16 ). As fighter types have proliferated, the air superiority fighter emerged as a specific role at the pinnacle of speed, maneuverability, and air-to-air weapon systems – able to hold its own against all other fighters and establish its dominance in
9514-529: The United States, Russia, India and China. The first step was to find ways to reduce the aircraft's reflectivity to radar waves by burying the engines, eliminating sharp corners and diverting any reflections away from the radar sets of opposing forces. Various materials were found to absorb the energy from radar waves, and were incorporated into special finishes that have since found widespread application. Composite structures have become widespread, including major structural components, and have helped to counterbalance
9656-399: The VVS made little use of the P-47 as a ground-attack aircraft, depending, instead, on their own widely produced—with 36,183 examples built during the war—special-purpose, armored ground-attack aircraft , the Ilyushin Il-2 . At the end of the war, Soviet units held 188 P-47s. The Luftwaffe operated at least one captured P-47. In poor weather on 7 November 1943, while flying a P-47D-2-RA on
9798-434: The XP-47B had its share of shakedown troubles, the newly reorganized United States Army Air Forces placed an order for 171 production aircraft, the first being delivered in December 1941. By the end of 1942, P-47Cs were sent to England for combat operations. The initial Thunderbolt flyers, 56th Fighter Group , were sent overseas to join the 8th Air Force . As the P-47 Thunderbolt worked up to operational status, it gained
9940-464: The YP-43. Kartveli said, "It will be a dinosaur , but it will be a dinosaur with good proportions". The armament was eight .50-caliber (12.7 mm) "light-barrel" Browning AN/M2 machine guns, four in each wing. The guns were staggered to allow feeding from side-by-side ammunition boxes, each with 350 rounds. All eight guns gave the fighter a combined rate of fire around 100 rounds per second. The XP-47B first flew on 6 May 1941 with Lowry P. Brabham at
10082-440: The ability to gather information by reconnaissance over the battlefield. Early fighters were very small and lightly armed by later standards, and most were biplanes built with a wooden frame covered with fabric, and a maximum airspeed of about 100 mph (160 km/h). A successful German biplane, the Albatross, however, was built with a plywood shell, rather than fabric, which created a stronger, faster airplane. As control of
10224-586: The advantages of fighting above Britain's home territory allowed the RAF to deny Germany air superiority, saving the UK from possible German invasion and dealing the Axis a major defeat early in the Second World War. On the Eastern Front , Soviet fighter forces were overwhelmed during the opening phases of Operation Barbarossa . This was a result of the tactical surprise at the outset of the campaign,
10366-534: The airspace over armies became increasingly important, all of the major powers developed fighters to support their military operations. Between the wars, wood was largely replaced in part or whole by metal tubing, and finally aluminum stressed skin structures (monocoque) began to predominate. By World War II , most fighters were all-metal monoplanes armed with batteries of machine guns or cannons and some were capable of speeds approaching 400 mph (640 km/h). Most fighters up to this point had one engine, but
10508-502: The basis for an effective "fighter" in the modern sense of the word. It was based on small fast aircraft developed before the war for air racing such with the Gordon Bennett Cup and Schneider Trophy . The military scout airplane was not expected to carry serious armament, but rather to rely on speed to "scout" a location, and return quickly to report, making it a flying horse. British scout aircraft, in this sense, included
10650-414: The bombers and enemy attackers as a protective shield. The primary requirement was for long range, with several heavy fighters given the role. However they too proved unwieldy and vulnerable, so as the war progressed techniques such as drop tanks were developed to extend the range of more nimble conventional fighters. The penetration fighter is typically also fitted for the ground-attack role, and so
10792-405: The centre of pressure, which occurs near the quarter- chord position at all but the highest speeds, was close to the main spar, preventing the wings from twisting. The Spitfire conducted its maiden flight on 5 March 1936. The elliptical wing was decided upon quite early on. Aerodynamically it was the best for our purpose because the induced drag caused in producing lift, was lowest when this shape
10934-467: The close air-support role. Since the Mustang was more vulnerable to being shot down, (and many were lost to antiaircraft fire), some World War II P-47 pilots suggested the more durable Thunderbolt should have been sent to Korea in the Mustang's place. The F-51D was available in greater numbers, though, in the USAF and ANG inventories. Due to continued postwar service with U.S. military and foreign operators,
11076-525: The cockpit, giving a total fuel capacity of 305 US gal (254 imp gal; 1,155 L). Power came from a Pratt & Whitney R-2800 Double Wasp two-row, 18-cylinder radial engine producing 2,000 hp (1,500 kW) — the same engine that powered the prototype Vought XF4U-1 fighter to just over 400 mph (640 km/h) in October 1940—with the Double Wasp on the XP-47B turning
11218-452: The controls. Although minor problems arose, such as some cockpit smoke that turned out to be due to an oil drip, the aircraft proved impressive in its early trials. It was lost in an accident on 8 August 1942, but before that mishap, the prototype had achieved a level speed of 412 mph (663 km/h) at 25,800 ft (7,900 m) altitude and had demonstrated a climb from sea level to 15,000 ft (4,600 m) in five minutes. Though
11360-610: The defense budgets of modern armed forces. The global combat aircraft market was worth $ 45.75 billion in 2017 and is projected by Frost & Sullivan at $ 47.2 billion in 2026: 35% modernization programs and 65% aircraft purchases, dominated by the Lockheed Martin F-35 with 3,000 deliveries over 20 years. A fighter aircraft is primarily designed for air-to-air combat . A given type may be designed for specific combat conditions, and in some cases for additional roles such as air-to-ground fighting. Historically
11502-724: The design approach of the Italians and Japanese made their fighters ill-suited as interceptors or attack aircraft. During the invasion of Poland and the Battle of France , Luftwaffe fighters—primarily the Messerschmitt Bf 109 —held air superiority, and the Luftwaffe played a major role in German victories in these campaigns. During the Battle of Britain , however, British Hurricanes and Spitfires proved roughly equal to Luftwaffe fighters. Additionally Britain's radar-based Dowding system directing fighters onto German attacks and
11644-735: The designation XP-47 . In the spring of 1940, Republic and the USAAC concluded that the XP-44 and the XP-47 were inferior to Luftwaffe fighters. Republic tried to improve the design, proposing the XP-47A, but this failed. Kartveli then designed a much larger fighter, which was offered to the USAAC in June 1940, which ordered a prototype in September as the XP-47B. The XP-47A, which had little in common with
11786-562: The early 1920s, the company's chief designer, Reginald Mitchell , had developed the Supermarine S.4 , a British elliptical wing racing seaplane ; it conducted its first flight during 1924. While the S.4's successors featured a wing designed by a different designer, Mitchell remained a proponent of the planform. By 1934, Mitchell and his design staff were working a new fighter aircraft for the Royal Air Force . They decided to use
11928-522: The early 1960s since both were believed unusable at the speeds being attained, however the Vietnam War showed that guns still had a role to play, and most fighters built since then are fitted with cannon (typically between 20 and 30 mm (0.79 and 1.18 in) in caliber) in addition to missiles. Most modern combat aircraft can carry at least a pair of air-to-air missiles. In the 1970s, turbofans replaced turbojets, improving fuel economy enough that
12070-513: The early model P-47 at low and medium altitude, where the P-47 had poor acceleration and performed aerobatics rather reluctantly. In mid-1944, 200 P-47D-22-REs and P-47D-27-REs were ferried to the USSR via Iraq and Iran. Many were sent to training units. Less than half reached operational units, and they were rarely used in combat. The fighters were assigned to high-altitude air defense over major cities in rear areas. Unlike their Western counterparts,
12212-453: The early production models of the He 111 were equipped with an elliptical wing. The chief reason for dropping the elliptical wing in favour of one with straight leading and trailing edges was economic, the latter design could be manufactured with greater efficiency. Perhaps the aircraft company most commonly associated with the elliptical wing was the British manufacturer Supermarine . During
12354-503: The elliptical wing, having done so during 1907. Ludwig Prandtl independently rediscovered this in Lifting-line theory (1917–1918). Despite this head-start, the elliptical wing was initially viewed as more a theoretical concept than one for practical application, in part due to the overriding needs to compromise between an aircraft aerodynamic properties and its other design aspects. It would be quite some time before practical use of
12496-513: The fighter. Rifle-caliber .30 and .303 in (7.62 and 7.70 mm) calibre guns remained the norm, with larger weapons either being too heavy and cumbersome or deemed unnecessary against such lightly built aircraft. It was not considered unreasonable to use World War I-style armament to counter enemy fighters as there was insufficient air-to-air combat during most of the period to disprove this notion. The rotary engine , popular during World War I, quickly disappeared, its development having reached
12638-406: The guns were subjected). Shooting with this traditional arrangement was also easier because the guns shot directly ahead in the direction of the aircraft's flight, up to the limit of the guns range; unlike wing-mounted guns which to be effective required to be harmonised , that is, preset to shoot at an angle by ground crews so that their bullets would converge on a target area a set distance ahead of
12780-519: The high production standards and rational design well-suited to mass production, and the high reliability of the hard-hitting Browning machine guns. With its high service ceiling, the P-47 was superior to fighters operating on the Eastern front, yielding a higher speed above 30,000 feet (9,100 m). The Yakovlev Yak-9 , Lavochkin La-5 FN, Messerschmitt Bf 109 G, and Focke-Wulf Fw 190 A outperformed
12922-433: The innovations was the development of the " finger-four " formation by the German pilot Werner Mölders . Each fighter squadron (German: Staffel ) was divided into several flights ( Schwärme ) of four aircraft. Each Schwarm was divided into two Rotten , which was a pair of aircraft. Each Rotte was composed of a leader and a wingman. This flexible formation allowed the pilots to maintain greater situational awareness, and
13064-514: The interceptor. The equipment necessary for daytime flight is inadequate when flying at night or in poor visibility. The night fighter was developed during World War I with additional equipment to aid the pilot in flying straight, navigating and finding the target. From modified variants of the Royal Aircraft Factory B.E.2c in 1915, the night fighter has evolved into the highly capable all-weather fighter. The strategic fighter
13206-508: The joint Army Air Forces – civilian Millville Airport in Millville, New Jersey , to train civilian and military pilots. The first P-47 combat mission took place 10 March 1943 when the 4th FG took their aircraft on a fighter sweep over France. The mission was a failure due to radio malfunctions. All P-47s were refitted with British radios, and missions resumed 8 April. The first P-47 air combat took place 15 April with Major Don Blakeslee of
13348-411: The lack of paddle-blade propellers. The arrival of the new Curtiss paddle-blade propeller in early 1944 significantly increased climb rate at lower altitudes and came as a surprise to German pilots, who had resorted to steep climbs to evade pursuit by the P-47. Some P-47 pilots claimed to have broken the sound barrier in steep dives, but later research revealed that because of the pressure buildup inside
13490-420: The last piston engine support aircraft could be replaced with jets, making multi-role combat aircraft possible. Honeycomb structures began to replace milled structures, and the first composite components began to appear on components subjected to little stress. With the steady improvements in computers, defensive systems have become increasingly efficient. To counter this, stealth technologies have been pursued by
13632-637: The leadership vacuum within the Soviet military left by the Great Purge , and the general inferiority of Soviet designs at the time, such as the obsolescent Polikarpov I-15 biplane and the I-16 . More modern Soviet designs, including the Mikoyan-Gurevich MiG-3 , LaGG-3 and Yakolev Yak-1 , had not yet arrived in numbers and in any case were still inferior to the Messerschmitt Bf 109 . As
13774-478: The leading and trailing edges to be curved. If one of these is straight, as in the semi-elliptical planform, the wing may still have an elliptical area distribution. Several aircraft of this type have been produced; one of the most successful being the American Seversky P-35 . During the postwar era, the semi-elliptical wing profile was extensively studied for its ground effect properties; it
13916-484: The low-altitude Spitfire variants. The Aichi D3A , a Japanese dive bomber operated by the Imperial Japanese Navy , also had an elliptical wing that bore considerable similarity to that of the He 70. The Mitsubishi A5M fighter also used an elliptical wing design. Several other types had planforms which differed relatively little from the elliptical. The Hawker Tempest II fighter, which evolved into
14058-410: The mid-1930s, the majority of fighters in the US, the UK, Italy and Russia remained fabric-covered biplanes. Fighter armament eventually began to be mounted inside the wings, outside the arc of the propeller, though most designs retained two synchronized machine guns directly ahead of the pilot, where they were more accurate (that being the strongest part of the structure, reducing the vibration to which
14200-403: The most efficient way to create lift is to generate it in an elliptical spanwise distribution across the wing. There is no inherent superiority to pure elliptical shapes and wings with other planforms can be optimized to give elliptical spanwise lift distributions. The basic elliptical wing shape has disadvantages: For a wing to have an elliptical area distribution, it is not necessary for both
14342-495: The most modern weapons, against an enemy in complete command of the air, fights like a savage…" Throughout the war, fighters performed their conventional role in establishing air superiority through combat with other fighters and through bomber interception, and also often performed roles such as tactical air support and reconnaissance . Fighter design varied widely among combatants. The Japanese and Italians favored lightly armed and armored but highly maneuverable designs such as
14484-417: The necessary structure and the things we wanted to cram in. And it looked nice. Beverly Shenstone Mitchell has sometimes been accused of copying the wing shape of Heinkel's He 70. Communications between Ernest Heinkel and Mitchell during the 1930s establishes Mitchell's awareness of the He 70 and its performance. Beverley Shenstone , the aerodynamicist on Mitchell's team, observed that: "Our wing
14626-430: The new design, was abandoned. The XP-47B was of all-metal construction (except for the fabric-covered tail control surfaces) with elliptical wings , with a straight leading edge that was slightly swept back. The air-conditioned cockpit was roomy, and the pilot's seat was comfortable—"like a lounge chair", as one pilot later put it. The canopy doors hinged upward. Main and auxiliary self-sealing fuel tanks were placed under
14768-607: The opposition. Subsequently, radar capabilities grew enormously and are now the primary method of target acquisition . Wings were made thinner and swept back to reduce transonic drag, which required new manufacturing methods to obtain sufficient strength. Skins were no longer sheet metal riveted to a structure, but milled from large slabs of alloy. The sound barrier was broken, and after a few false starts due to required changes in controls, speeds quickly reached Mach 2, past which aircraft cannot maneuver sufficiently to avoid attack. Air-to-air missiles largely replaced guns and rockets in
14910-488: The outbreak of World War I , front-line aircraft were mostly unarmed and used almost exclusively for reconnaissance . On 15 August 1914, Miodrag Tomić encountered an enemy airplane while on a reconnaissance flight over Austria-Hungary which fired at his aircraft with a revolver, so Tomić fired back. It was believed to be the first exchange of fire between aircraft. Within weeks, all Serbian and Austro-Hungarian aircraft were armed. Another type of military aircraft formed
15052-451: The outset for dual roles. Other fighter designs are highly specialized while still filling the main air superiority role, and these include the interceptor and, historically, the heavy fighter and night fighter . Since World War I, achieving and maintaining air superiority has been considered essential for victory in conventional warfare . Fighters continued to be developed throughout World War I, to deny enemy aircraft and dirigibles
15194-487: The period of rapid re-armament in the late 1930s, were not military budgets, but civilian aircraft racing. Aircraft designed for these races introduced innovations like streamlining and more powerful engines that would find their way into the fighters of World War II. The most significant of these was the Schneider Trophy races, where competition grew so fierce, only national governments could afford to enter. At
15336-433: The period, going from a typical 180 hp (130 kW) in the 900 kg (2,000 lb) Fokker D.VII of 1918 to 900 hp (670 kW) in the 2,500 kg (5,500 lb) Curtiss P-36 of 1936. The debate between the sleek in-line engines versus the more reliable radial models continued, with naval air forces preferring the radial engines, and land-based forces often choosing inlines. Radial designs did not require
15478-456: The pilot's maneuvering with the gunner's aiming was difficult. This option was chiefly employed as a defensive measure on two-seater reconnaissance aircraft from 1915 on. Both the SPAD S.A and the Royal Aircraft Factory B.E.9 added a second crewman ahead of the engine in a pod but this was both hazardous to the second crewman and limited performance. The Sopwith L.R.T.Tr. similarly added a pod on
15620-451: The pilots reported. Attempts were made with handheld weapons such as pistols and rifles and even light machine guns, but these were ineffective and cumbersome. The next advance came with the fixed forward-firing machine gun, so that the pilot pointed the entire aircraft at the target and fired the gun, instead of relying on a second gunner. Roland Garros bolted metal deflector plates to the propeller so that it would not shoot itself out of
15762-410: The point where rotational forces prevented more fuel and air from being delivered to the cylinders, which limited horsepower. They were replaced chiefly by the stationary radial engine though major advances led to inline engines gaining ground with several exceptional engines—including the 1,145 cu in (18,760 cm ) V-12 Curtiss D-12 . Aircraft engines increased in power several-fold over
15904-575: The propeller arc was evident even before the outbreak of war and inventors in both France and Germany devised mechanisms that could time the firing of the individual rounds to avoid hitting the propeller blades. Franz Schneider , a Swiss engineer, had patented such a device in Germany in 1913, but his original work was not followed up. French aircraft designer Raymond Saulnier patented a practical device in April 1914, but trials were unsuccessful because of
16046-461: The propeller arc. Wing guns were tried but the unreliable weapons available required frequent clearing of jammed rounds and misfires and remained impractical until after the war. Mounting the machine gun over the top wing worked well and was used long after the ideal solution was found. The Nieuport 11 of 1916 used this system with considerable success, however, this placement made aiming and reloading difficult but would continue to be used throughout
16188-406: The propeller blades were fitted with metal wedges to protect them from ricochets . Garros' modified monoplane first flew in March 1915 and he began combat operations soon after. Garros scored three victories in three weeks before he himself was downed on 18 April and his airplane, along with its synchronization gear and propeller was captured by the Germans. Meanwhile, the synchronization gear (called
16330-426: The propensity of the machine gun employed to hang fire due to unreliable ammunition. In December 1914, French aviator Roland Garros asked Saulnier to install his synchronization gear on Garros' Morane-Saulnier Type L parasol monoplane . Unfortunately the gas-operated Hotchkiss machine gun he was provided had an erratic rate of fire and it was impossible to synchronize it with the propeller. As an interim measure,
16472-502: The realization that the P-47 could perform a dual function on escort missions as a fighter-bomber . Even with its complicated turbosupercharger system, its sturdy airframe and tough radial engine could absorb significant damage and still return home. The P-47 gradually became the USAAF's primary fighter-bomber; by late 1943, early versions of the P-47D carried 500 lb (230 kg) bombs underneath their bellies, midproduction versions of
16614-421: The role of fighter aircraft is to establish air superiority of the battlespace . Domination of the airspace above a battlefield permits bombers and attack aircraft to engage in tactical and strategic bombing of enemy targets, and helps prevent the enemy from doing the same. The key performance features of a fighter include not only its firepower but also its high speed and maneuverability relative to
16756-532: The skies above the battlefield. The interceptor is a fighter designed specifically to intercept and engage approaching enemy aircraft. There are two general classes of interceptor: relatively lightweight aircraft in the point-defence role, built for fast reaction, high performance and with a short range, and heavier aircraft with more comprehensive avionics and designed to fly at night or in all weathers and to operate over longer ranges . Originating during World War I, by 1929 this class of fighters had become known as
16898-417: The sky and a number of Morane-Saulnier Ns were modified. The technique proved effective, however the deflected bullets were still highly dangerous. Soon after the commencement of the war, pilots armed themselves with pistols, carbines , grenades , and an assortment of improvised weapons. Many of these proved ineffective as the pilot had to fly his airplane while attempting to aim a handheld weapon and make
17040-411: The sky. When his unit (4th Fighter Group) was equipped with Thunderbolts, ace Don Blakeslee said, referring to the P-47's vaunted ability to dive on its prey, "It ought to be able to dive. It certainly can't climb." (Blakeslee's early-model P-47C had not been fitted with the new paddle blade propeller). The 4th Fighter Group's commander hated the P-47, and his prejudices filtered down to the group's pilots;
17182-493: The sole remaining P-47 group in the 8th Air Force, the 56th FG remained its top-scoring group in aerial victories throughout the war. With increases in fuel capacity as the type was refined, the range of escort missions over Europe steadily increased until the P-47 was able to accompany bombers in raids all the way into Germany. On the way back from the raids, pilots shot up ground targets of opportunity, and also used belly shackles to carry bombs on short-range missions, which led to
17324-408: The steady increases in aircraft weight—most modern fighters are larger and heavier than World War II medium bombers. Because of the importance of air superiority, since the early days of aerial combat armed forces have constantly competed to develop technologically superior fighters and to deploy these fighters in greater numbers, and fielding a viable fighter fleet consumes a substantial proportion of
17466-420: The target aircraft. The success or failure of a combatant's efforts to gain air superiority hinges on several factors including the skill of its pilots, the tactical soundness of its doctrine for deploying its fighters, and the numbers and performance of those fighters. Many modern fighter aircraft also have secondary capabilities such as ground attack and some types, such as fighter-bombers , are designed from
17608-485: The top wing with no better luck. An alternative was to build a "pusher" scout such as the Airco DH.2 , with the propeller mounted behind the pilot. The main drawback was that the high drag of a pusher type's tail structure made it slower than a similar "tractor" aircraft. A better solution for a single seat scout was to mount the machine gun (rifles and pistols having been dispensed with) to fire forwards but outside
17750-464: The two Rotten could split up at any time and attack on their own. The finger-four would be widely adopted as the fundamental tactical formation during World War Two, including by the British and later the Americans. World War II featured fighter combat on a larger scale than any other conflict to date. German Field Marshal Erwin Rommel noted the effect of airpower: "Anyone who has to fight, even with
17892-550: The very end of the inter-war period in Europe came the Spanish Civil War . This was just the opportunity the German Luftwaffe , Italian Regia Aeronautica , and the Soviet Union's Voenno-Vozdushnye Sily needed to test their latest aircraft. Each party sent numerous aircraft types to support their sides in the conflict. In the dogfights over Spain, the latest Messerschmitt Bf 109 fighters did well, as did
18034-519: The vicinity of Roncey , P-47 Thunderbolts of the 405th Fighter group destroyed a German column of 122 tanks, 259 other vehicles, and 11 artillery pieces. With the end of World War II, orders for 5,934 were cancelled. The P-47 (redesignated to F-47 after 1947) continued serving with the USAAF through 1947, the USAAF Strategic Air Command from 1946 through 1947, the active-duty United States Air Force (USAF) until 1949, and with
18176-478: The war as the weapons used were lighter and had a higher rate of fire than synchronized weapons. The British Foster mounting and several French mountings were specifically designed for this kind of application, fitted with either the Hotchkiss or Lewis Machine gun , which due to their design were unsuitable for synchronizing. The need to arm a tractor scout with a forward-firing gun whose bullets passed through
18318-609: The war, the P-47 was retrofitted with more powerful 5 in (130 mm) HVAR rockets . [REDACTED] Bolivia [REDACTED] Brazil [REDACTED] Chile [REDACTED] China [REDACTED] Colombia [REDACTED] Cuba [REDACTED] Dominican Republic [REDACTED] Ecuador [REDACTED] France Fighter aircraft Fighter aircraft (early on also pursuit aircraft ) are military aircraft designed primarily for air-to-air combat . In military conflict,
18460-506: The war. Fighter development stagnated between the wars, especially in the United States and the United Kingdom, where budgets were small. In France, Italy and Russia, where large budgets continued to allow major development, both monoplanes and all metal structures were common. By the end of the 1920s, however, those countries overspent themselves and were overtaken in the 1930s by those powers that hadn't been spending heavily, namely
18602-409: Was a favorite tactic). The adoption of the triple-tube M10 rocket launcher with M8 high-explosive 4.5 in (110 mm) rockets (each with an explosive force similar to a 105 mm artillery shell)—much as the RAF's Hawker Typhoon gained when first fitted with its own two quartets of underwing RP-3 rockets for the same purposes—significantly increased the P-47's ground attack capability. Late in
18744-709: Was designed by Alexander Kartveli , a man of Georgian descent. It was to replace the Seversky P-35 developed earlier by a Russian immigrant named Alexander P. de Seversky . Both had fled from their homeland, Tbilisi , Georgia , to escape the Bolsheviks . In 1939, Republic Aviation designed the AP-4 demonstrator powered by a Pratt & Whitney R-1830 radial engine with a belly-mounted turbocharger . A small number of Republic P-43 Lancers were built, but Republic had been working on an improved P-44 Rocket with
18886-806: Was due in part to its radial piston engine, which unlike comparable liquid-cooled engines, had a high tolerance for damage. The Thunderbolt's eight .50 in (12.7 mm) machine guns were capable against lightly armored targets, although less so than cannon-armed aircraft of the day. In a ground-attack role, the armor-piercing , armor-piercing incendiary, and armor-piercing incendiary tracer ammunition proved useful in penetrating thin-skinned and lightly armored German vehicles and causing their fuel tanks to explode, as well as occasionally damaging some types of enemy armored fighting vehicles (AFVs). P-47 pilots frequently carried two 500 lb (230 kg) bombs, using skip bombing techniques for difficult targets (skipping bombs into railroad tunnels to destroy hidden enemy trains
19028-412: Was huge; the British pilots joked that a Thunderbolt pilot could defend himself from a Luftwaffe fighter by running around and hiding in the fuselage. Optimized for high-altitude work, the Thunderbolt had 5 feet (1.5 m) more wingspan, a quarter more wing area, about four times the fuselage volume, and nearly twice the weight of a Spitfire V. One Thunderbolt pilot compared it to flying a bathtub around
19170-468: Was much thinner and had quite a different section to that of the Heinkel. In any case, it would have been simply asking for trouble to have copied a wing shape from an aircraft designed for an entirely different purpose". Almost all Republic P-47 Thunderbolts , an American fighter aircraft, were outfitted with elliptical wings; only the last production models differed, with squared-off wingtips, akin to
19312-420: Was no longer a handicap and one or two were used, depending on requirements. This in turn required the development of ejection seats so the pilot could escape, and G-suits to counter the much greater forces being applied to the pilot during maneuvers. In the 1950s, radar was fitted to day fighters, since due to ever increasing air-to-air weapon ranges, pilots could no longer see far enough ahead to prepare for
19454-485: Was originally intended for a fighter role with the U.S. Navy , but it was canceled. This blurring follows the use of fighters from their earliest days for "attack" or "strike" operations against ground targets by means of strafing or dropping small bombs and incendiaries. Versatile multi role fighter-bombers such as the McDonnell Douglas F/A-18 Hornet are a less expensive option than having
19596-508: Was pioneered before World War I by Breguet but would find its biggest proponent in Anthony Fokker, who used chrome-molybdenum steel tubing for the fuselage structure of all his fighter designs, while the innovative German engineer Hugo Junkers developed two all-metal, single-seat fighter monoplane designs with cantilever wings: the strictly experimental Junkers J 2 private-venture aircraft, made with steel, and some forty examples of
19738-412: Was postulated that it would be suitable for ground-effect vehicles (which operate close to the water, in ground effect, to avoid the higher induced drag that occurs out of ground effect). The low level of induced drag produced by a semi-elliptical wing would be beneficial for these vehicles. The British theoretical aerodynamicist Frederick Lanchester was perhaps the first person to write in detail about
19880-511: Was relatively roomy and comfortable and the bubble canopy introduced on the P-47D offered good visibility. Nicknamed the "Jug" owing to its appearance if stood on its nose, the P-47 was noted for its firepower and its ability to resist battle damage and remain airworthy. A present-day U.S. ground-attack aircraft, the Fairchild Republic A-10 Thunderbolt II , takes its name from the P-47. The P-47 Thunderbolt
20022-553: Was the only 8th Air Force unit still flying the P-47, by preference, instead of the P-51. The unit claimed 677-1/2 air victories and 311 ground kills, at the cost of 128 aircraft. Lieutenant Colonel Francis S. Gabreski scored 28 victories, Captain Robert S. Johnson scored 27 (with one unconfirmed probable kill leading to some giving his tally as 28), and 56th FG Commanding Officer Colonel Hubert Zemke scored 17.75 kills. Despite being
20164-442: Was used: the ellipse was ... theoretically a perfection ... To reduce drag we wanted the lowest possible thickness-to-chord, consistent with the necessary strength. But near the root the wing had to be thick enough to accommodate the retracted undercarriages and the guns ... Mitchell was an intensely practical man ... The ellipse was simply the shape that allowed us the thinnest possible wing with room inside to carry
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