Broadway Limited Imports N Scale EMD NW2 and SW7
The EMD NW2 and SW7: Reliable Workhorses of the Rail Yard
The Electro-Motive Division (EMD) NW2 and SW7 were two of the most influential diesel-electric switcher locomotives of the mid-20th century. Their compact yet powerful design made them indispensable for rail yard operations and industrial switching.
What Do NW2 and SW7 Mean?
- NW2 stands for "Nine hundred series switcher, 2nd generation." The NW series originated with the NW1, and the NW2 was a refined version introduced in 1939, boasting 1,000 horsepower from its 12-cylinder EMD 567 engine.
- SW7 stands for "Switcher, Welded frame, 7th model." The SW series was designed with a different frame construction compared to the NW series, and the SW7, introduced in 1949, offered a power increase to 1,200 horsepower, making it well-suited for demanding switching tasks.
The NW2: The Pioneer of the Post-War Era
The NW2 quickly became one of EMD’s most successful switchers. Its rugged construction and advanced electrical systems ensured reliable service in busy rail yards. More than 1,100 units were produced before the model was discontinued in 1949. Many NW2 locomotives remained in operation for decades, a testament to their durability.
The SW7: A Natural Successor
Following the NW2, EMD released the SW7 in 1949, retaining the reliable design elements of its predecessor while offering slight refinements that improved operational efficiency. Though production numbers were lower than the NW2, the SW7 solidified EMD's reputation for producing dependable switchers capable of handling demanding tasks.
Legacy and Impact
Both locomotives played a vital role in shaping mid-century railroad operations. Their reliability ensured long-term use across North America, and today, many NW2s and SW7s are preserved in museums and heritage railroads, celebrated by rail enthusiasts.
These switchers were more than just workhorses—they were a cornerstone of efficient rail operations for decades. Their engineering excellence ensured they remained relevant long after newer models emerged.
