411th Flight Test Squadron

It conducted the Advanced Tactical Fighter program flyoff competition between the Lockheed YF-22 and Northrop YF-23 prototypes.

The YF-22 (and the Pratt & Whitney F119 engine) was declared the winner of the competition on 23 April 1991, and on 2 August 1991 both YF-22 prototypes were transferred to the Air Force.

[3] On 25 March 2009 an F-22 operated by a squadron pilot, David P. Cooley, crashed 35 miles northeast of Edwards during a training flight.

[4] The squadron successfully tested the F-22 flying on a 50/50 fuel blend of conventional petroleum-based JP-8 and biofuel derived from camelina, a weed-like plant not used for food, in March 2011.

Testing consisted of air starts, operability, and performance at different speeds and altitudes throughout the flight envelope.

The YF-22 and YF-23 in formation during flight testing in the early 1990s
An F-22 Raptor assigned to the 411th Flight Test Squadron flies over Edwards Air Force Base, California, in 2018.