The Yakovlev Yak-53 was a single seat aerobatic trainer aircraft produced in the USSR during 1981/2.
[1] The prototype Yak-53 was derived from the Yak-52, differing in being a single seater designed as an aerobatic trainer.
The cockpit used the flying controls of the Yak-50 without the spring loading of the Yak-52, and the use of the undercarriage and tankage of the prototype Yak-52 to save weight, making the Yak-53 100 kg (220 lb) lighter than the Yak-52.
Some sources state that a 3-bladed propeller of western origin was used for the record setting flights.
[1] Data from OKB Yakovlev[1]General characteristics Performance