GT1 (later GT1h - gas turbine locomotive, type 1, hybrid) is a Russian mainline two-section gas turbine locomotive (a locomotive with a gas turbine engine), the most powerful gas turbine locomotive in the world. The locomotive uses AC-DC electrical transmission: a gas turbine engine running on liquefied natural gas is connected to an alternator, and the current generated by the latter is rectified into direct current and fed to traction motors, which set the locomotive in motion. A design feature of the locomotive is the placement of a single gas turbine unit on only one of its sections, and the fuel compartment on the other, while both sections are traction