Grumman G-118

The Grumman G-118, sometimes called the XF12F though that designation was never official, was a design for an all-weather missile-armed interceptor for use on United States Navy aircraft carriers. It was first conceived as an uprated F11F Tiger and grew into a larger project: a two-seat, twin-engined supersonic fighter with a 45 degree swept wing, a T-tail, a boundary layer control system and an encapsulated crew ejected downwards. Two General Electric J79 turbojets were to be supplemented by a throttleable liquid-fuelled rocket engine, and weapons were to be AIM-7 Sparrow and AIM-9 Sidewinder missiles or AIR-2 Genie nuclear rockets. Two prototypes were ordered in 1955, but development was cancelled the same year in favour of the F4H Phantom II before any were built.