Maumelle Ordnance Works Locomotive 1 is a gasoline powered mechanically driven two-axle railway locomotive which was built in 1942 by Vulcan Iron Works (of Wilkes-Barre Pennsylvania) for the United States War Department’s Maumelle Ordnance Works. It was added to the U.S. National Register of Historic Places in 2006 and is preserved at the Fort Smith Trolley Museum.