F-109 Bell D-188A (unofficial military designations XF-109/XF3L)
F-110 Phantom ( F-110 Spectre, the original name of the McDonnell Douglas F-4 Phantom II aircraft )
Note: Designations YF-110, YF-112 through YF-116, and YF-118 were captured foreign aircraft used for evaluation and aggressor training. They were given designations in sequence—based on chronology—with “black” project aircraft, continuing the pre-1962 F series.[15][16]
- YF-110 MiG-21s – Mikoyan-Gurevich
- YF-112 Su-22 – Sukhoi
- YF-113 MiG-23s – Mikoyan-Gurevich
- YF-113G – possible USAF “black project”[15]
- YF-114 MiG-17 – Mikoyan-Gurevich
- YF-115 – Rumored designation of captured Su-7
- YF-116 – Rumored designation of captured MiG-25
- F-117D Tacit Blue – Northrop
- YF-118 – Rumored designation of MiG-29
- YF-121 – Rumored “black project”[15]
