P-47 Thunderbolt

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The P-47 fighter plane, nicknamed the Thunderbolt, was the workhorse tactical airplane of the US Army Air Forces (AAF) in World War II. In a frantic technological race against the Nazis, American designers created a series of fighters and bombers that had the speed, climb-rate, maneuverability, and range to do the job.

P-47b.jpg

Contents

Origins

The P-47 originated in 1940, when AAF commander General Hap Arnold asked for a plane to give air superiority over the Germans. Alexander Kartveli, chief designer at Republic Aviation, met the challenge using an unusually large fuselage and the new 18 cylinder, 2,000 horsepower air-cooled radial "Double Wasp" engine from Pratt and Whitney. Its high-altitude performance was dramatically enhanced by a General Electric turbo-supercharger.[1]

Weapon system

Production model #1 flew in spring 1942 and #10,000 flew in fall 1944. The plane, produced by Republic Aviation, cost an average of $80,000 (compared to $50,000 for the smaller P-51). The 1945 version P-47M, burning 115/145 grade gasoline, had a maximum speed of 460 mph, a ceiling of 40,000 feet, and (with auxiliary drop tanks) a combat range of 2,000 miles. Escorting the B-17 and the B-29, its 8 50-caliber machine guns could rip apart Luftwaffe or Japanese fighters (which had only 90 octane gasoline). As a tactical weapon it was armed with five 500 pound bombs plus ten 5" rockets. At ten tons, the big Thunderbolt needed a long runway, and was less agile than the Luftwaffe's Focke-Wolf 190. But it was better than good enough, downing 3 German planes for every loss.

Tactical air support

The main missions of the P-47 were tactical air support for ground combat, and (until the P-51 came on line), defending strategic bombers from Luftwaffe fighters. Although its loss rate was only 7 per 1,000 sorties, these tactical workhorses were sent out so often that half were shot down, chiefly by flak guns.

Infantrymen were ecstatic about the effectiveness of close air support:

Air strikes on the way; we watch from a top window as P-47s dip in and out of clouds through suddenly erupting strings of Christmas-tree lights [flak], before one speck turns over and drops toward earth in the damnest sight of the Second World War, the dive-bomber attack, the speck snarling, screaming, dropping faster than a stone until it's clearly doomed to smash into the earth, then, past the limits of belief, an impossible flattening beyond houses and trees, an upward arch that makes the eyes hurt, and, as the speck hurtles away, WHOOM, the earth erupts five hundred feet up in swirling black smoke. More specks snarl, dive, scream, two squadrons, eight of them, leaving congealing, combining, whirling pillars of black smoke, lifting trees, houses, vehicles, and, we devoutly hope, bits of Germans. We yell and pound each other's backs. Gods from the clouds; this is how you do it! You don't attack painfully across frozen plains, you simply drop in on the enemy and blow them out of existence.[2]

Escort role

The slower, shorter-range P-47 was already escorting bombers part of the way into Germany; in a reversal of roles, that mission in January 1944 went to the P-51 Mustang while the P-47 was re assigned to tactical targets on the ground. The Thunderbolt's air-cooled engine was less vulnerable to ground flak; one bullet hole in the plumbing of a Mustanng's water-cooled engine would drain off the coolant and crash the P-51.

Impact

Thunderbolt groups claimed the destruction of 6,000 tanks and armored fighting vehicles, 9,000 locomotives, 86,000 items of rolling stock, 68,000 trucks, and huge numbers of enemy troops killed or wounded. According to air power historian W. A. Jacobs, "All authorities agreed that the P-47 was the best fighter-bomber."[3]

The Pacific War

Although most well-known for the war in Europe, the P-47 had an excellent service record in the Pacific theater as well. The first Thunderbolts to fight the Japanese arrived in June 1943 in Port Moresby, New Guinea.

318th Fighter Group's P-47's intercept Japansese "Betty" bomber, Pagan Island, 1944

They formed the 348th Fighter Group, under the command of Lt. Col. Neel Kearby. The big fighter proved itself against the Japanese on October 11, when four Thunderbolts, including one flown by Col. Kearby, engaged a force of forty Japanese fighters over Wewak, New Guinea, a major Japanese base. The American pilots downed nine enemy fighters without suffering so much as a bullet hole. Kearby himself shot down six to become the first P-47 ace of the Pacific War. By the end of 1943, the 348th had downed over 150 enemy planes for the loss of only eight pilots.

By this time, other units had converted to the P-47 as well, so that almost half of the Fifth Air Force’s fighter strength was Thunderbolts. Like almost all other Allied planes, the Thunderbolt was less maneuverable than the Japanese fighters, but had the advantage in speed (especially diving speed), power, and toughness. P-47 squadrons later saw heavy action in the Philippines campaign, and longer-range P-47Ns flew escort and fighter sweep missions over the Japanese mainland from bases in Okinawa.[4]

RAF P-47s saw action in the Burma campaign, starting from late 1944. They were used mainly in the ground attack role.[5]

Post-war Service

The P-47 served in the Air National Guard after the war, and in several foreign air forces besides. The Republic of Taiwan flew Thunderbolts, and two of them were lost to Chinese MiG-15s on March 18, 1954.[6] Four days later, two Taiwanese P-47s avenged their comrades by teaming up to down a MiG-15.[7]

Many Central and South American countries acquired surplus P-47s from the United States. Chile flew Thunderbolt fighters until 1959.[8]

French P-47s saw action in the Algerian War of Independence.[9]

Bibliography

  • Cooling, Benjamin Franklin ed. Close Air Support (1990) GPO
  • Craven, Wesley and James Cate, eds. The Army Air Forces In World War II] official history. (1948-55)
  • Johnsen, Frederick A. Republic P-47 Thunderbolt (1999) excerpt and text search
  • McFarland, Stephen L. and Wesley Phillips Newton. To Command the Sky: The Battle for Air Superiority over Germany, 1942-1944 (1991)
  • Rowland, Michael D. "Why the U.S. Air Force Did Not Use the F-47 Thunderbolt in the Korean War," Air Power History, Vol. 50, 2003 online edition
  • Spire, David N. Air Power for Patton's Army: The 19th Tactical Air Command in the Second World War (2002) online edition

See also

notes

  1. The turbo-supercharger utilized an exhaust-driven compressor to drive a centrifugal supercharger. GE, at work on the device since 1918, finally solved the extremely difficult problems of very high speed rotation at high temperatures.
  2. Brendan Phibbs, The Other Side of Time: A Combat Surgeon in World War II (1987) entry for Jan. 21, 1945 p 149
  3. W. A. Jacobs, "The Battle for France, 1944," in B. Franklin Cooling, Case Studies in the Development of Close Air Support (1990), p. 250.
  4. Mustang and Thunderbolt Aces of the Pacific and CBI, by John Stanaway, Osprey Publishing, 1999
  5. The Encyclopedia of 20th Century Air Warfare, ed. by Chris Bishop, Aerospace Publishing, 2001
  6. PRC/Chinese Air-to-Air Victories
  7. Taiwanese Air-to-Air Victories
  8. South American ‘Jug’
  9. The Republic P-47 Thunderbolt
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