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In page Vought F4U Corsair:

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This was the designation for Brewster-built F4U-1. Labor troubles delayed production; the Navy terminated the company's contract and Brewster folded soon after.[9] Poor quality wing fittings meant that these aircraft were red-lined for speed and prohibited from aerobatics after several lost their wings.[citation needed] None of the Brewster-built Corsairs reached front line units. 430 Brewster Corsairs (334 F3A-1 and 96 F3A-1D), more than half of Brewster's total production, were delivered to the Fleet Air Arm.