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To implement tactical air the United States needed better planes and pilots. The aircraft industry had lagged behind Germany, Britain and even Japan during the 1930s, so the nation entered the war with inferior equipment. At Guadalcanal, the Bell P-400 Aircobras were helpless against superior Japanese planes (consequently they were relegated to close air support, to the delight of the mud soldiers.) When Stalin asked for 500 additional Lend-Lease planes in 1942, he specified he did not want any more of the Curtiss P-40 Tomahawks, because it "was not up to the mark in the fight against modern German fighter planes." 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.

To implement tactical air the United States needed better planes and pilots. The aircraft industry had lagged behind Germany, Britain and even Japan during the 1930s, so the nation entered the war with inferior equipment. At Guadalcanal, the Bell P-400 Aircobras were helpless against superior Japanese planes (consequently they were relegated to close air support, to the delight of the mud soldiers.) When Stalin asked for 500 additional Lend-Lease planes in 1942, he specified he did not want any more of the Curtiss P-40 Tomahawks, because it "was not up to the mark in the fight against modern German fighter planes." 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.

    

    

The workhorse of tactical air power was the [[P-47]] Thunderbolt. It originated in 1940, when 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.<ref>The turbo-supercharger compressed exhaust air and returned it to the carburetors. GE, at work on the device since 1918, finally solved the extremely difficult problems of very high 11 speed rotation at high temperatures... smuggled: Constant 222 C&C 5:248 </ref>

The workhorse of tactical air power was the [[P-47]] Thunderbolt. It originated in 1940, when 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.<ref>The turbo-supercharger utilizes an exhaust-driven turbine to drive a centrifugal supercharger. GE, at work on the device since 1918, finally solved the extremely difficult problems of very high 11 speed rotation at high temperatures... smuggled: Constant 222 C&C 5:248 </ref>

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 B-17s and B-29s, 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.

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 B-17s and B-29s, 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.