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Because development of the XP-86 had reached an advanced stage, the idea of changing the sweep of the wing was met with resistance from some senior North American staff.Despite stiff opposition, after good results were obtained in wind tunnel tests, the swept-wing concept was eventually adopted.It was also feared that, because these designs were more advanced in their development stages, the XP-86 would be canceled.Crucially, the XP-86 would not be able to meet the required top speed of 600 mph (970 km/h); North American had to quickly come up with a radical change that could leapfrog it over its rivals.Both the interceptor and fighter-bomber versions carried six 0.50 in (12.7 mm) M3 Browning machine guns with electrically boosted feed in the nose (later versions of the F-86H carried four 20 mm (0.79 in) cannon instead of machine guns).Firing at a rate of 1,200 rounds per minute, the 0.50 in guns were harmonized to converge at 1,000 ft (305 m) in front of the aircraft, using armor-piercing (AP) and armor-piercing incendiary (API) rounds, with one armor-piercing incendiary tracer (APIT) for every five AP or API rounds.
This engine was built by GM's Chevrolet division until production was turned over to Allison.
The North American F-86 Sabre, sometimes called the Sabrejet, is a transonic jet fighter aircraft.
Produced by North American Aviation, the Sabre is best known as the United States' first swept wing fighter that could counter the similarly-winged Soviet Mi G-15 in high-speed dogfights in the skies of the Korean War (1950–1953), fighting some of the earliest jet to jet battles in history.
The North American F-86 Sabre was the first American aircraft to take advantage of flight research data seized from the German aerodynamicists at the end of World War II.
This data showed that a thin swept wing could greatly reduce drag and delay compressibility problems that had bedeviled even prop-powered fighters such as the Lockheed P-38 Lightning approaching the speed of sound.
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Unguided 2.75 in (70 mm) rockets were used on some fighters on training missions, but 5-inch (127 mm) rockets were later carried on combat operations.