Norfolk Southern number 1616, an AS-416, at Chesapeake, VA, in 1968.

(Roger Puta, courtesy Marty Bernard, railfan 44, Public domain, via Wikimedia Commons)



The BLH AS-416 was a diesel-electric locomotive of the road switcher type rated at 1,625 hp (1,212 kW), that rode on three-axle trucks, having an A1A-A1A wheel arrangement.

Used in much the same manner as its four-axle counterpart, the AS-16, though the wheel arrangement spread out the axle load for operation on light rail such as are found on branch lines.

It was introduced in 1950 as a replacement of the DRS-6-4-1500 and remained in Baldwin-Lima-Hamilton's catalog until their cessation of locomotive manufacture in 1956.

Only 25 units were sold to four railroads — all of whom had bought the earlier model. The vast majority (17 of the 25 units) were purchased by the original Norfolk Southern Railway (1942–82), becoming a signature locomotive for the company.


Original owners

Railroad Quantity Road numbers Notes
Savannah and Atlanta Railway 3 108–110
Columbus and Greenville Railway 1 606
Norfolk Southern Railway 17 1601–1617
Office des Chemins de Fer Algériens 4 040 DF 1–4
Total 25

Columbus & Greenville Railway number 606 at Illinois Railway Museum.

(Slambo, CC BY-SA 4.0 <>, via Wikimedia Commons)



Surviving examples include:

  • Columbus and Greenville 606, at the Illinois Railway Museum.
  • Norfolk Southern 1616, at the North Carolina Transportation Museum.



Type and origin
Power type: Diesel-electric
Builder: Baldwin-Lima-Hamilton Corporation
Model: AS-416
Build date: May 1951–December 1955
Total produced: 25
​• AAR A1A-A1A
Gauge: 4 ft 8+1⁄2 in (1,435 mm) standard gauge
Length over couplers: 58’
Prime mover: 608A
Aspiration: Turbocharger - Elliott Company H704 (125 hp)
Generator: Westinghouse YG42B
Traction motors: Westinghouse 370DL (x 4)
Performance figures
Power output 1,625 hp (1,212 kW) (marketed as 1,600 hp)