GE U18B A Maine Central Railroad U18B, on lease to the short-lived Niagara and Western New York Railroad, July 2002 Power type Diesel-electric Builder GE Transportation Systems Model U18B Build date March 1973 – October 1976 Total production 163 AAR wheel arr. B-B Gauge 4 ft 8½ in (1435 mm) Length 54 ft 8 in Prime mover GE 7FDL-8 Cylinders 8 Power output 1800 hp Locale North America Disposition some still in service The GE U18B Diesel-electric locomotive was introduced by GE Transportation as a branchline roadswitcher in 1973, featuring an 8 cylinder FDL engine. This locomotive is easy to spot due to its relatively short length -- 54 ft 8 in. The Seaboard Coast Line Railroad (SCL) was the primary North American buyer of the U18B, purchasing 105 units, followed by the Maine Central Railroad (MEC), which ordered 10 units. Most of SCL's and MEC's U18Bs rode on refurbished Blomberg trucks, recycled from old EMD locomotives, making the U18B even more visually distinct from other GE locomotives. Many railfans refer to GE's Universal Series locomotives as "U-Boats." Due to its smaller size, the U18B received the nickname "Baby Boat." Not many U18Bs still exist, but some shortline railroads, such as the Pickens Railway, still have several U18Bs in everyday service. GE included information about a B18-7 locomotive (which would have succeeded the U18B) in their 1978 "Series-7 Road Locomotives" service manual; however, the updated unit did not generate any orders and none were built or sold. Additionally, no other North American locomotives have used the 8 cylinder FDL engine since the U18B was discontinued. Original owners Railroad Quantity Road numbers Maine Central Railroad 10 400-409 National de Mexico 45 9000-9044 Providence and Worcester 1 1801 Seaboard Coast Line Railroad 105 250-261, 300-392 Texas Utilities 2 101, 102 References Sarberenyi, Robert. GE U18B Original Owners. GE Transportation. Locomotive Service Manual for Series-7 Road Locomotives (Section 1). GE Transportation. Operating Manual - Diesel-Electric Locomotive - GEJ-3856C (1973). Diesel locomotives built by GE Industrial and switch engines 60-ton boxcab, 100-ton boxcab, 600-hp centercab, 1000-hp centercab, DEY-2, EN-6, 25-ton, 35-ton, 43-ton, 44-ton, 45-ton, 50-ton, 60-ton, 65-ton, 70-ton, 80-ton, 95-ton, 100-ton, 110-ton, 125-ton, 126-ton, 128-ton, 1800-hp transfer, 2000-hp transfer, U6B Universal Series: UD18, U18B, U23B, U25B, U28B, U30B, U33B, U36B, U23C, U25C, U28C, U30C, U33C, U36C, U50, U50C Passenger locomotives: U30CG, U34CH, P30CH, Genesis series (P40DC, P32AC-DM, P42DC) Dash-7 series: B23-7, B30-7, B30-7A, B36-7, C30-7, C30-7A, C36-7 Dash-8 series: B32-8, B32-8WH, B39-8, B40-8, B40-8P, B40-8W, C32-8, C39-8, C40-8, C40-8M, C40-8W, C44-8W Dash-9 series: C40-9, C40-9W, C44-9W AC series: AC4400CW, AC6000CW Evolution Series: ES40DC, ES44DC, ES44AC Search Term: "GE_U18B" Categories: GE locomotives | B-B locomotives | 1973 introductions

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