The prototype Yak-55 first flew in May 1981, was unveiled at the Moscow Tushino air show in August 1982 and displayed (but did not compete) at the 1982 World Aerobatic Championships.
The prototype Yak-55 first took flight in May 1981, was unveiled at the Moscow Tushino air show in August 1982 and exhibited (but did not compete) at the 1982 World Aerobatic Championships.