Subsequently, each of these railroads built copies, and several other railroads operated locomotives with similar dimensions and equipment. The Light Pacifics were limited to 54,000 lbs load per axle, versus 60,000 for the Heavy Pacifics, and this allowed the Light Pacifics to run on most main lines. Our Heavy and Light models follow the original USRA designs closely. Railroad specific variations are not modeled on these locomotives.Many Pacifics used the same 10,000 gallon tender as the USRA Mikados, and our models uses this 10,000 gallon tender. Product Information: Paragon4 Sound & Operation System featuring ROLLING THUNDERTM Authentic Sounds and Prototypical Operation in both DC and DCC environments Integral DCC Decoder with Back EMF for Industry Best Slow Speed Operation in DC and DCC Precision Drive Mechanism engineered for continuous heavy load towing and smooth slow speed operation Premium Caliber Painting with Authentic Paint Schemes Prototypical Light Operation with Golden White LED Headlight Die Cast Boiler Body with Die Cast chassis for Maximum Tractive Effort Traction Tires for Additional Tractive Effort (2) Operating MicroTrains-compatible Couplers Operating Headlight Separately Applied Handrails, Ladders, Whistle, and Brass Bell Will Operate on Code 55, 70, and 80 Rail Recommended Minimum Radius: 9.75 inches 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. THANKS FOR YOUR INTEREST IN OUR ITEMS.