Apr 17, 2000 · The U.S. Air Force's classified YF-113G aircraft was a MiG-23, not an early effort to explore radar-evading technologies, as reported earlier (AW&ST Apr. 10, p. 18). The existence of the...

Originally, the designations' suffix letters were not only used to designate different versions of the same basic aircraft type (as in standard USAF designations), but also to distinguish between individual aircraft of the same type (e.g. YF-113A, YF-113C and YF-114C were all MiG-17Fs).

May 15, 2001 · 'The U.S. Air Force's YF-113G aircraft has been identified as a 1970s stealth testbed and as a MiG-23, but both of these are wrong, according to an observer and some USAF documentation ( AW&ST Apr. 10, 2000, p. 18; Apr. 17, 2000, p. 33).

The MiG-21s and Shenyang F-7Bs were called the "YF-110" (the original designation for the USAF F-4C), while the MiG-23s were called the "YF-113". [ 2 ] [ 6 ] The focus of Air Force Systems Command (AFSC) limited the use of the MiGs as tools with which to understand the performance, capabilities, and qualities of the enemy.

It developed technology and materials which would later be used on Boeing's X-45 unmanned combat air vehicle. As an internal project, this aircraft was not given an X-plane designation. There are no public plans to make this a production aircraft. It …

Aug 4, 2018 · In the early 1990s, Dennis F. "Bones" Sager was handpicked to command a "Classified Flight Test Squadron" that led a "classified prototype aircraft" called the YF-113G "from design to first flight."

Feb 21, 2016 · The aircraft bore US designations prefixed by YF- with numbers ranging from around 110 to 118 with letter suffixes. For example, YF-114C may have been a MiG-17F used in the Have Ferry program.

Sep 18, 2006 · The YF-110 designation is believed to have been used by MiG-21s, the YF-112 by the MiG-17, and the YF-113 by the MiG-23, though the YF-113G designation was used by a more highly classified black world programme.

Designations YF-110 and YF-112 through YF-116 were acquired (captured or purchased) foreign aircraft used for evaluation and aggressor training. Designations YF-117 and YF-118 were black projects, with the F-117 designation later becoming the official Tri-Service designation of the production variant of the former.

Examples given include YF-110 for MiG-21s and YF-113 for MiG-23s. Suffix letters (as in YF-113E or YF-113G) are also used. The YF-113G designator actually refers to a completely different aircraft type (most likely a U.S.-built testbed) than YF-113 designations with other suffixes.