Used as a test aircraft. To the Museum in 1979. Later moved inside for storage/restoration.

This F-4 was originally built for the USN as F4H-1 but, before delivery, modified to become the USAF YRF-110A Spectre prototype, which was redesignated RF-4C in 1962. In 1965, it became the YF-4E testbed, to test F-4E slats and Fly by Wire (as seen in this picture). In 1974, canards were added on this aircraft. This photo was taken after the unqiue Phantom was retired and preserved in the Air Force museum.

This a/c was the first YRF-110 Spectre built, later designated YRF-4C. Originally being built as a USN F4H-1, it was converted on the assembly line to USAF specifications. After finishing its career as a YRF-4C test a/c, it was modified into the prototype F-4E, and was also used for advanced development testing including fly-by-wire flight testing. It is currently at the USAF Museum but appears to be in storage as of 2021.

This F-4 was originally built for the USN as F4H-1 but, before delivery, modified to become the USAF YRF-110A Spectre prototype, which was redesignated RF-4C in 1962. In 1965, it became the YF-4E testbed, to test F-4E slats and Fly by Wire (as seen in this picture). In 1974, canards were added on this aircraft. This photo was taken after the unqiue Phantom was retired and preserved in the Air Force museum.

This aircraft was originally built for the USN as F4H-1 but, before delivery, modified to become the USAF YRF-110A Spectre prototype, which was redesignated RF-4C in 1962. In 1965, it became the YF-4E testbed, to test F-4E slats and fly by wire (as seen in this picture). In 1974, canards were added on this aircraft. This photo was taken before that modification.