What is "vfax"

VFAX for Naval Fighter Attack Experimental was actually two specifications for two US Naval fighter projects. The first was for a low cost lightweight complement for the F-111B which could replace the F-4 Phantom II for air superiority, escort, and ground attack missions in the early 1960s. This role was dropped in favor of the VFX aircraft, which emerged as the F-14 Tomcat. The second VFAX evolved when the VFX proved too costly to replace all existing fighters and attack aircraft, and the Navy was invited to take part in the USAFs Lightweight Fighter Program (LWF). The Navy chose the "loser" of the LWF contest for its VFAX role, which was redesigned to become the F/A-18 Hornet.