Carrying the Union Pacific roadname, several features distinguished B23-7s and B30-7s from predecessor models. The long hood stepped outward in the area of the exhaust stack to accommodate a relocated oil cooler. In addition, the frame was 2 feet longer than that of the U23B. An FB-2 style truck was offered as standard equipment, but some railroads opted to use trade-in trucks. Therefore, AAR type B and Blomberg trucks could be found on some models. Six power assembly doors (located near the center of the long hood) indicated that the B23-7 was powered by a 12-cylinder GE FDL engine. The Atlas Master Series Gold versions of these locomotives are able to use all of the QSI Quantum System sound features on DC layouts with use of the Atlas Quantum Engineer. Features include pilots with and without anti-climber, cab headlights or low-nose headlights,cab with 4 or 2 side windows,bell mounted under the sill or on the long hood, FB-2, AAR type B, or Blomberg truck side-frames used where appropriate per road name, separately-applied scale detail parts include: windshield wipers, metal grab irons, coupler cut levers, multiple-unit hoses, snow plow, train line hoses, fine scale handrails, and more!see-through step detail on sill Etched metal radiator grilles, painted crew members, factory-equipped with AccuMate knuckle couplers,coupler pocket designed to accept AccuMate Proto-couplers, five-pole skewed armature motor with dual flywheels for optimum performance at all speeds, directional lighting. Electronic Dual-Mode Decoder (e-DMD) that allows the locomotive to run in DCC or traditional DC.
Road name:� Union Pacific