Superpower
The superpower has lagged behind for at least five years in the research and development of the sixth generation aircraft?
When the first prototype of yf23 left the factory on June 23, 1990, it made its first flight on August 27; The first prototype of yf22 left the factory on August 29 of the same year and made its first flight on September 29. Moreover, on September 18, during the fifth test flight, yf23 flew out of the cruising speed of nearly Mach 1.5 without afterburner, that is, without afterburner. This record was even expanded to above Mach 1.7 later. Who would have thought that these amazing records at that…