When the design specifications were complete, it was decided on the use of a simple articulated, high speed, 132 ft. long locomotive sporting sixteen 68 diameter drive wheels. What they created was the longest and among the heaviest, most powerful steam locomotive legends in the world. And had not the worker at ALCO chalked Big Boy on the side of the smoke box of one of the 4-8-8-4s under construction, a name that immediately caught on, it is rumored that the name of the type would have been Wasatch, for the mountains they were built to conquer.

Quote from Worlds Greatest Steam Locomotives by Eugene L. Huddleston:

There were 25 locomotives fabricated in two different groups. Class 1 were locomotives #4000-4019 and Class 2 was numbered 4020-4024. The first Big Boy #4000 was delivered to Omaha, NE on September 5, 1941. The Union Pacific Railroad's commitment to the Big Boy required them to replace the lighter rail and straighten out many miles of track for clearance as well as to resize elements of their service areas (such as turntable lengths, etc.) for the entire line these locos would run on.

The Big Boys demonstrated fantastic strength and speed as they faced these challenges throughout their storied careers. With the total mileage on the Big Boy fleet being approximately 1,000,000 miles for each locomotive, one must say that they earned their reputation.

Several examples remain in museums around the country but silently they sit as a visual echo to the thunder that once made them revered throughout the landscape that the Big Boys dominated.

In our first production of this model in N scale, BLI is modeling the Union Pacific Big Boy with these notable features:

Accurately modeled front end with appropriate aftercooler system for each class

Accurately modeled 25-C-100 and 25-C-400 tender, appropriate for each class

Accurately modeled oil tender for #4014 which operates in excursion service today

Two models painted in attractive two-tone gray paint schemes that the Big Boys never received in real life

• Paragon4 Sound & Control System featuring ROLLING THUNDER

  Integral Dual-Mode Decoder with Back EMF for Superb Slow Speed Operation in DC and DCC

  Precision Drive Mechanism Engineered for Heavy Towing and Smooth Slow Speed Operation

  Operating Smoke Unit with On/Off Switch

  Six Drivers and All Tender Wheels Pick-up Electricity from Track

  Die Cast Locomotive Body with Die Cast Chassis for Heavier Weight and Maximum Tractive Effort

  Rubber Tires on Two Drivers for Additional Tractive Effort

  Premium Caliber Painting

  Prototypically Accurate Paint Schemes and Road Numbers

  Many Separately Applied Details such as Handrails, Grab Irons, Piping, Tender Ladders, Whistle, and Bell

  Prototypical Headlight and Rear Light Operation

  Separately Controllable Cab Light and Lighted Numberboards

  Prototypically Accurate Sounds for the Union Pacific Big Boy

  Operating Microtrains-compatible Couplers

  Will Operate on Code 55, Code 70, and Code 80 Rail

  Minimum Operating Radius: 9.75 inches

  
  

  Broadway Limited Imports is proud to introduce Paragon4: The new benchmark for premium HO sound-equipped locomotives. These DC and DCC-Sound equipped locomotives feature the ALL-NEW Paragon4 sound and control system. Each Paragon4 locomotive comes with BLI's own integral DCC Decoder factory installed. Paragon4 locomotives offer Dual Mode DC and DCC operation with superb back EMF motor control, improved DC motor control, built-in capacitor pack for more reliable electrical pick-up, industry best on-board sound with Rolling Thunder functionality, Pro Lighting Mode for prototypical light control, Switcher model for precise low speed control, recordable DCC operation for automated playback, and the same excellent detail level as Broadway Limited's Paragon3 Series models.

  Paragon4 Sound & Control System Features:

  Operates in DC & DCC with improved DC speed control (use DCMaster for DC Sound)

  Built-In extra capacitance to navigate imperfect track

  Pro Lighting Mode offers individual control of all lights on model

  Switcher Mode for precise low speed control

  Record & Play Operation - Records and plays back sounds and movements once or repeatedly for automatic operation

  High Resolution Audio

  Quillable Horn for various whistle lengths and patterns

  Choice of 3 selectable Horns

  Alternate Whistle / Horn where applicable for locomotive with air horn and steam whistle - both the main whistle and alternate can be easily played

  Adjustable bell ringing interval for faster or slower bell

  Numerous user-mappable functions with available keys

  Multiple realistic passenger and crew sounds play on command

  Grade Crossing Automatic Signal

  Automatic Forward / Reverse Signal

  Prime Mover sound intensity varies with load

  Individually adjustable sound volumes for each effect

  EZ Reset Button for quick return to factory default settings

  **Specifications on this page subject to change.