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Message: <blockquote data-quote="robunos" data-source="post: 508808" data-attributes="member: 553">Regarding the aerodynamic problems with the Swift; this from Gunston's 'Fighters of the Fifties, pp.228-9 :-"To accommodate the ammunition for the extra pair of guns ( the original Swift only had two guns, the RAF required four ) the inboard leading edge was kinked forward, and this caused unacceptable pitch-up when pulling even modest g at Mach 0.85 or above . . . More than 45 trial modifications to the wings sought to eradicate pitch-up, the final standard including dog-teeth and extended outer sections."My edit in brackets.cheers,Robin.</blockquote>