Trains in Uzbekistan and Turkmenistan

Anyone know what types/HP of engines are used in the railroads of Uzbekistan and Turkmenistan? Also, any idea of the controlling grades going from these countries towards Pakistan & Afghanistan? I’m a model railroader and am being asked how many tank cars a typical Uzbekistan/Turkmenistan locomotive can be expected to pull in this situation. Any help would be greatly appreciated.

John H.

You might try posting this over on the Trains Magazine forum. It has a lot more activity, and a wide range of knowledgable railfans.