F-11 TigerGrumman F 11 Tiger airplane model. Originally designated the F9F 9, as a Cougar variant, the Tiger was redesignated the F 11F 1 and developed as an entirely new aircraft. The F 11 was the first aircraft to use the NACA developed "area rule" concept from design inception. This concept, more familiarly known as the "coke bottle" shaped fuselage, greatly reduced drag. This was also the first carrier based fighter with supersonic capability, due to the