YAK-52, OK-JAX
The aircraft with the registration OK-JAX is a 1982 Bacau-manufactured Yak-52, with the construction number 822710.
This particular Yak-52 has had several registrations over the years, including RA-44460, LY-AHE, and 127 YELLOW.
It is currently registered in the Czech Republic.
The Yak-52 is known for its aerobatic capabilities and is often used in airshows and aerobatic competitions.
It is powered by a single Ivchenko Vedeneyev M-14P radial engine.
If you want to see it in action, there are some great videos of Yak-52 aerobatics and displays online. Turn on subtitles in English, because the video is in Czech :-)
https://youtu.be/FEoekTktOw8?si=R56G8nS1XHcrpKTO