Bureau Number 160780 was the sixth full-scale developmental F-18 built for the U.S. Navy. Previously used for Navy spin testing, the single-seat aircraft was loaned to NASA and converted into the High Alpha Research Vehicle. Einar Enevoldson flew its first NASA functional-check flight on April 2, 1987. It then served all three HARV research phases, culminating in forebody-strake flight tests in September 1996. NASA records 385 research flights and identifies the aircraft as preserved at the Virginia Air & Space Center in Hampton.