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 Yak-55 prototype first flew in May 1981, was presented at the Moscow Tushino air show in August 1982, and participated in the 1982 World Aerobatic Championships (but did not compete).