Northern Pacific Baldwin DRS-4-4-1500 501, probably at Marshall, Washington, date unknown. Photographer was probably Phil Hastings.
This was one of only 35 Baldwin DRS-4-4-1500's built. This engine was built by Baldwin in September, 1948, as NP 176 as a two unit order for Northern Pacific 175-176.
NP 501 was re-engined with an EMD 567-BC in 1966.
(Craig Garver, Public domain, https://www.flickr.com/photos/digitalrailartist/50524175003/in/photolist-2jYDAZz-2jFhLTK-2jD4wGD)
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 (1,100 kW), that rode on two-axle trucks, having a B-B wheel arrangement. It was manufactured by Baldwin Locomotive Works from 1947 until it was replaced in 1950 by the 1,600-horsepower (1,200 kW) AS-16.
Nine railroads bought 35 locomotives, with five railroads later buying the successor model.
Seaboard Air Line Baldwin DRS-4-4-1500 1471 at St Petersburg, Florida, September 1, 1962. Photographer: T King.
(Craig Garver, Public domain, https://www.flickr.com/photos/digitalrailartist/50327730521/)
| Railroad | Quantity | Road numbers | Notes |
|---|---|---|---|
| Erie Railroad | 6 | 1100–1105 | |
| Lehigh Valley Railroad | 1 | 200 | |
| Iron Mines of Venezuela (Bethlehem Steel Company) | 3 | 1–3 | |
| Minneapolis, St. Paul and Sault Ste. Marie Railroad ("Soo Line") | 8 | 360–367 | |
| Missouri Pacific Railroad (St. Louis, Brownsville and Mexico Railway) | 4 | 4112–4115 | |
| New York Central Railroad | 2 | 7300–7301 | |
| Northern Pacific Railway | 2 | 175–176 | Renumbered 500–501 to Burlington Northern 405-406 |
| Pennsylvania-Reading Seashore Lines | 6 | 6000–6005 | |
| Western Maryland Railway | 3 | 170–172 | |
| Total | 35 |
Baldwin DRS-4-4-1500 Overview
Type and origin
Power type: Diesel-electric
Builder: Baldwin Locomotive Works
Model: DRS-4-4-1500
Build date: July 1947–May 1950
Total produced: 35
Specifications
Configuration:
• AAR B-B
• UIC Bo′Bo′
Gauge: 4 ft 8+1⁄2 in (1,435 mm) standard gauge
Length: 57 ft 10+3⁄4 in (17.65 m)
Height: 14 ft (4.27 m)
Locomotive weight: 120 short tons (107 long tons; 109 t)
Prime mover: Baldwin 608SC
Engine type: Four-stroke diesel
Aspiration: Turbocharged
Displacement: 15,832 cu in (259.44 L)
Alternator: Westinghouse YG42A
Generator: Westinghouse 471A
Traction motors: Westinghouse 370F (4)
Cylinders: 8
Cylinder size: 12+3⁄4 in × 15+1⁄2 in (324 mm × 394 mm)
Transmission: Electric
Locomotive brake: Straight air
Train brakes: Air
Performance figures
Maximum speed: 65 mph (105 km/h)
Power output: 1,500 hp (1,100 kW)
Tractive effort: 61,510 lbf (273.61 kN)
Burlington Northern Baldwin DRS-6-6-1500 407 at Pasco, Washington, June 30, 1971. Photographer: Ed Kanak.
(Craig Garver, Public domain, https://www.flickr.com/photos/digitalrailartist/50302513333/)