 It was built strictly as a demonstrator, but it was succeeded by a series of similar locomotives (the "Grasshoppers" and the "Crabs") designed by Ross Winans, the first head of motive power on the railroad.Early B&O designs were quite unlike those used on other roads, due to in-house design and the emphasis of pulling power.4-2-0 locomotives from Norris (represented by the "Lafayette" reproduction in the B&O museum's collection) were the anomaly on a railroad which was already building eight-coupled (0-8-0) locomotives well before the Civil War.