The Buran programme was an attempt by the Soviet Union to construct an orbital spaceplane to perform similar functions to the Space Shuttle.
The aerodynamic testbed OK-GLI was constructed in 1984 to test the in-flight properties of the Buran design.
Unlike the American prototype Enterprise, OK-GLI had four AL-31 turbofan engines fitted, meaning it was able to fly under its own power.
The first operational orbiter, Buran flew one test mission, designated 1K1, on November 15, 1988 at 6:00:00 Moscow time.
and flew two orbits, traveling 83,707 km (52,013 mi) in 3 hours, 25 minutes (0.14 flight days).