Rail Line: Union Pacific Road Number: 4001 Gauge: O Gauge Power: Electric Engine Type: Steam Min Curve: O31 Dimensions: Length: 29" Most Recent Catalog: 2026 Volume 1 Standard Finish Product Line: LionMaster System: 3-Rail LionChief+ 2.0 Features: LionMaster Series - all the detail you love in our full scale steam but sized to accommodate smaller layouts and curves! Dual powerful maintenance-free motors TMCC Command control - able to run with conventional, TMCC Cab 1 or LEGACY Cab 2 / Cab 1L in Cab 1 mode LionChief Bluetooth® Control - run with the Universal Remote or free CAB3 App on your smart device Speed control Able to lash-up with other LC Command LC+2.0 and LEGACY locomotives Directional headlights Firebox flicker Lighted marker lights and numberboards Fan-driven smoke Dual speakers ElectroCoupler on tender Overview: Our LionMaster Big Boy still captures the massive look and feel of the prototype compressed just enough to make this beast O-31 curve friendly! Perfect for small - mid-sized layouts and anyone who loves big steam, these impressive models are ready for long trains of traditional or scale-sized rolling stock. With Bluetooth® and TMCC command control, you've got a world of control options available. Now for the first time in this size, we're adding oil tender and removed aftercooler details to bring a modern 4014 to your rails.