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Atlas HO Scale
B23-7 Locomotive
Gold Series
With Factory Installed DCC & Sound!
Prototype Information
General Electric’s “Dash 7” locomotive line was introduced as a replacement for the older “Universal-Series” of the 60s and early 70s. “Dash 7” series improvements included increased fuel efficiency, tractive effort and reliability. The B23-7 was a direct replacement for the 2,250HP U23B model, while the B30-7 replaced the 3,000HP U30B. The first B23-7s were produced for Conrail in September, 1977, and the first B30-7s were produced for Frisco three months later.
B23-7 production continued through 1984, with a total of 535 units built. Conrail was the largest purchaser of the model, with a total fleet of 141 units. 199 B30-7s were produced through 1981, with the combined fleets of Southern Pacific and Cotton Belt being the largest at 110 units.
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. herefore, 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. Eight power assembly doors in the same location help to identify the B30-7, which included a 16-cylinder FDL engine.
There were three distinct “Phases” of GE 4-axle “Dash 7” locomotive production. Atlas models on this run represent "Phase 2" units with a 37' 2" wheel base. Phase 2 production lasted from the Spring of 1979 through the Fall of 1980.
Model Information & Features
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, and fine scale handrails
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
Atlas Master™ Series Gold Additional Features
Electronic Dual-Mode® Decoder (e-DMD) that allows your locomotive to run in DCC or traditional DC
QSI® Quantum System™ Features Including
(Atlas Master Series Gold locomotives only)
Dual speaker system
Authentic diesel engine sounds
Squealing brakes
Doppler effect
Air let-off in neutral
Coupler impact sounds when operated with DCC
Helper mode that mutes the whistle and bell for double heading
Please Note > Due to the higher starting voltage required to operate the sound system, it is not possible to MU a non-sound-equipped loco in DC (analog) mode
Southern Pacific #5108
MSRP $259.95
Your Price Only $219.95
MTW Part #AT-8171 | 
