Chesapeake & Ohio class F-19 4-6-2 No. 493 poses at Cincinnati in June 1940, in an image from a now-discontinued Flickr site. The photo came from the Harold Vollrath collection, and also appears in the Railfan.net ABPR Archive. These distinctive locomotives, with their Elesco feedwater heater, pilot-mounted headlight, and "flying pumps" (air pumps mounted on the front of the smokebox), were built by Alco's Richmond works in 1926 and were the C&O's finest passenger power for two decades, heading the railroad's premier train, the George Washington. In that service they had 74-inch drivers, 27x28-inch cylinders, and a boiler pressure of 200 p.s.i. They put out 46,892 pounds of tractive force and weighed 351,500 pounds (being later fitted with a tender that weighed even more). With a grate area of 80 square feet, they had 4239 square feet of evaporative heating surface and 1213 square feet of superheating surface. In 1946-47 the C&O rebuilt the F-19 class into the streamlined L-1 class of 4-6-4s keeping the same numbers, although very little of the original locomotive remained after rebuilding. The first member of the original F-19 class, now L-1 Hudson No. 490, survives at the B&O Railroad Museum in Baltimore.