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.

In this multi-service project, Air Force and United States Navy pilots evaluated the MiG-21, redesignated as the "YF-110", in a variety of situations. The aircraft was referred to as "The Doughnut" due to the doughnut -shaped intake at the aircraft nose; this led to the project name "Have Doughnut".

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 …

Nov 2, 2013 · Have Doughnut saw the MiG-21, using cover designation YF-110, fly over Groom Lake against F-4, F-105, F-111, F-100, F-104, B-66, RF-101, RF-4 and F-5 during offensive and defensive missions that...

Mar 3, 2025 · Have Doughnut saw the Mig-21, using cover designation YF-110, fly over Groom Lake against F-4, F-105, F-111, F-100, F-104, B-66, RF-101, RF-4 and F-5 during offensive and defensive missions that gave the evaluation team the opportunity to assess the effectiveness of the U.S. air combat tactics.

Redesignated as the YF-110, the Fishbed’s test and evaluation project was code-named Have Doughnut. Because the MiG-21 was then doing battle in Vietnam, US analysts sought urgently to determine the MiG’s performance, compared to select US aircraft, and to formulate tactics for both defensive and offensive maneuvering.

Sep 20, 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.

Redesignated as the YF-110, the Fishbed’s test and evaluation project was code-named Have Doughnut. Because the MiG-21 was then doing battle in Vietnam, US analysts sought urgently to determine the MiG’s perfor-mance, compared to select US aircraft, and to formulate tactics for both defen-sive and offensive maneuvering. The

YF-110 The MiG-21F is a short-range day fighter-interceptor and the first major production version of the popular MiG-21 series. It is but one of many versions of this aircraft that have served in the air arms of many nations around the world.

Oct 18, 2022 · Once the craft was transferred to the United States, it was re-designated the “YF-110” and taken to the military’s Groom Lake Testing Area, better known as Area 51, to be tested against contemporary American aircraft.