Baldwin DRS-4-4-1500

The Baldwin DRS-4-4-1500 was a diesel-electric locomotive of the road switcher type, rated at 1,500 horsepower and riding on two-axle trucks in a B-B wheel arrangement. Baldwin Locomotive Works manufactured it from 1947 until the 1,600 horsepower AS-16 replaced it in 1950. Nine railroads bought 35 of them, and five of those railroads later bought the successor model, which makes it the first step in a line of four-axle Baldwin road switchers that ended with the AS-16 and, later, the RS-12.