The horsepower race was in full swing by the late 1960s when GE introduced the 3,300hp, four-axle U33B locomotive. 137 units were produced between September 1967 and August 1970 when production ended. GE upped the horsepower ante in 1970 with the introduction of the 3,600hp U36B which was produced between May 1970 and December 1974. Both models were externally identical, and internally they were both powered by the same GE FDL-16 cylinder four-stroke engine. The horsepower increase was achieved through adjustments to the fuel rack settings and other internal component changes. One key spotting feature of both models was the built-out radiator “wings” on the long hood.

Atlas’ U33B and U36B model is being offered in both an early and late phase. The early phase model includes flushmounted radiator screens and air intake screens on the long hood. In addition, there is a built-out area on the top of the front and rear pilots. Late phase models include corrugated radiator and air intake screens, with a flat pilot face. An optional separate electrical equipment box is included on the left side walkway behind the cab per the prototype. AAR-B or Blomberg trucks are used when appropriate.

Features:

• Flush-mounted radiator screens and air intake screens on the long hood – early phase

• Built-out area on the top of the front and rear pilots – early phase.

• Corrugated radiator and air intake screens, with a flat pilot face – late phase

• Optional separate electrical equipment box will be included on the left side walkway behind the cab per the prototype

• AAR-B or Blomberg trucks will be used when appropriate

• Separately-applied detail parts including: windshield wipers, metal grab irons, coupler cut levers, fine scale handrails & more!

• Five pole skewed armature motor with dual flywheels for optimum performance at all speeds

• Directional lighting with Golden-white LEDs

• Blackened metal wheels

Silver Sound Ready

Atlas Silver Sound Ready models are equipped with a speaker for easy conversion to sound with the addition of a decoder.

Atlas Master Series Gold Features: 

• ESU LokSound decoder, supporting all DCC programming modes. 

• Flexible mapping of function keys F0 to F31. 

• Follows all NMRA DCC standards and recommended practices. 

• Lighting effects to match the prototype, including Gyralight and Mars light where appropriate. 

• Over 20 sound effects are available, including engine start-up and shutdown, prime mover sounds through all eight notches, bell, air horn, air compressor, dynamic brakes and more.