Power type Steam Driver dia. 57 in (1,448 mm) | ||
Gauge 4 ft 8 ⁄2 in (1,435 mm) standard gauge Adhesive weight 440,800 lb (199,900 kg) Loco weight 481,200 lb (218,300 kg) | ||
Southern Pacific Railroad's AC-2 class of steam locomotives was the second in the AC series of cab forward locomotives built for Southern Pacific (SP). This class consisted of locomotives that were rebuilt from Baldwin-built SP MC-4 class locomotives by 1930.
The rebuild from MC-4 class gained the locomotives about 5,000 pounds-force (22 kN) in tractive effort, but also increased the locomotives' weight by about 50,000 pounds (23,000 kg). The locomotives were deemed successful and remained in active service until after World War II.
References
Southern Pacific class AC-2 Wikipedia(Text) CC BY-SA