Crashed Mil Mi-6 helicopter converted into a permanent base. It's outfitted with long range communication equipment, workshop and some other stuff. This design was done for Ray of Hope, a S.T.A.L.K.E.R. multiplayer mod project.

Learn more about Ray of Hope mod here:
https://roh-online.com/
https://www.moddb.com/mods/ray-of-hope-co-op-online