initially destined as F-4B-19-MC. Converted to YF-4J prototype when still on the production line. Received new paintscheme in 2009, now resting in Tucson Pima Air & Space Museum
In late 1964, three F-4Bs were converted to test numerous improvements to the basic design and were designated as YF-4J. One of them is seen here on display at the Pima Air and Space Museum, still wearing the Naval Air Test Facility markings.