Virginian Railway 2-6-6-0 Mallet Articulated Compound Steam Locomotive
The Virginian Railway 2-6-6-0 Class AA steam locomotive shown in the drawing below were built by the Richmond plant of the American Locomotive Company (Alco). The locomotives are designed for use as pushers with heavy coal trains on the Clark's Gap grade which is 2.07 per cent and 14 miles in length. Additional information on the Class AA locomotives can be found at SteamLocomotive.com.
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Another drawing and article (shown below) on the Virginian 2-6-6-0 Mallet can be found in the June 1909 edition of American Engineer and Railroad Journal. Visit Google Books to download a PDF of this book.