train-seating steam generator for passenger service, identified by an exhaust stack between the panes of the front windshield. Limiting the locomotive's success were several mechanical and ergonomic drawbacks. The BL2 was expensive and time-consuming to build because of its unique carbody design. Rather than being built in small segments which could be moved to another area for final assembly, the BL2 had to be built entirely in once place. The mechanical components in the engine compartment were difficult to access and maintain, reducing its appeal among railroad shop crews. The locomotive's carbody lacked the full-length walkways of a true switch engine (a mistake not repeated on the subsequent "GP" series of diesels or other road switchers), making it difficult for the brakeman or switchman to move from one point on the locomotive to another during switching operations. Finally, although the industrial designers at EMD tried to build a carbody that evoked high-class passenger trains while retaining the utilitarianism of railroad work, the design never became popular. EMD applied the lessons learned from the BL2's lack of success in developing the GP7. Original owners Preservation The following BL2s have been preserved: Monon #32; Kentucky Railway Museum . Western Maryland Railway #81; Baltimore and Ohio Railroad Museum , Baltimore, Maryland. Western Maryland Railroad #82; Durbin and Greenbrier Valley Railroad . Janesville & Southeastern #52, ex-Bangor and Aroostook #52; née-Bangor and Aroostook #552 National Railroad Museum , Green Bay, Wisconsin; operated on Saratoga and North Creek Railway #52 . To be leased to Hoosier Valley Railroad Museum as of June 2021. Bangor and Aroostook #54; Lackawaxen and Stourbridge Railroad , Honesdale, Pennsylvania. Bangor and Aroostook #56; currently owned by Saratoga and North Creek Railway #56 . Formerly Janesville, Wisconsin. To be leased to Hoosier Valley Railroad Museum as of June 2021. Bangor and Aroostook #557; Cole Transportation Museum , Bangor, Maine. References Drawings by Win Cuisinier (Preston Cook). BL2 B-B locomotives Diesel-electric locomotives of the United States Standard gauge locomotives of the United States Railway locomotives introduced in 1947 Streamlined diesel locomotives