I'm curious why would the swing wing be a barrier ? If the swing wing allowed for "short field" operations then I would see some possible advantages ? (Although I'm not convinced that "short field" capability was a NORAD requirement ?)What would have been the big challenges for the F-111 as a NORAD interceptor aircraft? Seems simple enough; big engines, big radar, missiles, long range. Perhaps the swing wing presents a barrier, leading me back to the A-5.
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