DB Class 23 Steam Engine Train 1.0

Very nice steam locomotive. 

I am about 11 years late on this, but the whole question of articulating the steam locomotive and its tender could be eliminated by using a steam tank locomotive.  Under the Whyte classification system, you would place a T after the wheel configuration to denote a steam loco that has it's water tank wrapped around the exterior of the boiler, and it's coal or fuel oil bunker attached behind the cab.  No tender!

Examples include the Boston and Albany 2-6-6T and 4-6-6T steam locomotives used for commuter train service.  Central Railroad of New Jersey had a 4-6-4T.  Canadian National had a similar passenger steamer.  And many smaller tank engines served as switchers with configurations like 0-4-0T and 0-6-0T.  In Europe, tank steamers might have been more common than in North America.