HO SD40 Locomotive Western Maryland #7447 (ATH87230)

Western Maryland SD40 diesel locomotive in HO scale, number 7447, is a meticulously crafted model designed for serious HO layouts. This six-axle, 3,000-horsepower SD40 is faithfully reproduced with era‑accurate details such as medium plows on both ends, a bell mounted on the left side of the long hood, and extra ballast along the right‑hand walkway, plus early cut levers and handrails. The model features the SD40’s hallmark detailing—including Flexicoil-C trucks with high brake cylinders, see-through dynamic brake and radiator fans, finely rendered handrails and photo-etched windshield wipers—and a detailed 4,000‑gallon fuel tank. It rides on McHenry scale knuckle couplers and RP25 wheels for compatibility with standard HO rolling stock, while the all‑wheel-drive chassis and a precision five‑pole skew-wound motor with flywheels deliver smooth, quiet operation. Fully assembled and ready to run, this locomotive brings a high level of realism to freight yards, main lines, and industrial scenes.

Newer versions add enhancements such as a more powerful, quieter can motor and LED lighting for long life. The model is DCC‑ready with Quick Plug plug‑and‑play for easy digital control, and sound‑equipped variants use Tsunami2 DCC/Sound with dual cube speakers for authentic engine, horn, and bell sounds. Its painted and printed decoration, injection‑molded body, and detailed prototypical features—like see‑through cab windows, dynamic brake and radiator fan details, and separately applied air tanks—make it a faithful Western Maryland representative. It is designed for HO layouts with a minimum 18" radius (22" recommended), delivering reliable, prototypical performance for freight operations.