Atlas N 40005932 DCC Sound Rock Island RI GE U33B Diesel Locomotive ESU LokSound August 15, 2026 By 0 The horsepower race was in full swing by the late 1960s when GE introduced the 3,300 HP, four-axle U33B locomotive. 137 units were produced between September 1967 and August 1970 when production ended.