Yakovlev Yak-52
Yak-52 is a two seat training and sport aircraft.  It entered service with
the DOSAAF, a Soviet paramilitary training organization, in the 1970's.
Below: DOSAAF Yak-52 based near Moscow. I got the aerobatic ride of my life in this airplane.
Below two photographs:  DOSAAF Yak-52 based in Kiev.
 Bottom photo shows interesting tow vehicle!