SK-3 "Krasnaya Zvezda" ("Red Star" - in Russian) aerobatic soaring glider.
Now FS2K compatible!

SK-3 was designed by Sergey P. Korolev and made its maden flight in
summer 1930. It was the first aerobatic soarer built in Soviet Union
and specially designed for aerobatic flights in ridge soaring conditions.

By Alexander Belov