The BOR-5 () is a 1:8 sized test flight vehicle, used to study the main aerodynamic, thermal, acoustic and stability characteristics of the Buran. It follows upon the BOR-4 reentry test vehicle.
It was put into a suborbital trajectory by a K65M-RB5 rocket launched from Kapustin Yar, near Volga, towards Lake Balkhash at the altitude of about 100 km with velocities from 4000 to 7300 kilometers per second.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).