OK-GLI

OK-GLI
BTS-02

Atmospheric Buran testbed currently on display in Technik Museum Speyer
Construction number	OK-0.02
Country	Soviet Union
Status	At the Technik Museum Speyer, Germany
First flight	Flight 1 10 November 1985
Last flight	Flight 25 15 April 1988
No. of missions	25 test flights

The OK-GLI (Russian: Орбитальный корабль для горизонтальных лётных испытаний, ОК-ГЛИ, romanized: Orbital'nyy korabl' dlya gorizontal'nykh lotnykh ispytaniy, lit. 'Orbital ship for horizontal flight tests'), also known as Buran Analog BTS-02 (Russian: БТС-02, Большой транспортный самолёт второй, romanized: bolshoi transportny samolyot vtoroi, lit. 'big transport aircraft, the second'), was a Soviet atmospheric test vehicle ("Buran aerodynamic analogue") of the orbital Buran spacecraft. It was constructed for the Buran programme in 1984, and was used for 25 test flights between 1985 and 1988 before being retired.

The aircraft was subsequently put on exhibit in Australia (2000), Bahrain (2002) and since 2008 has been on exhibit at the Technik Museum Speyer in Germany.