Pennsylvania Railroad Baldwin DR-4-4-15 "Sharknose" No. 9704 at Ebenezer, New York, June 10, 1955. Photographer unknown.

(Craig Garver, Public domain,


BLW logo b&w


The Baldwin DR-4-4-15 was a 1,500-horsepower (1,100 kW) cab unit-type diesel locomotive built for freight service by the Baldwin Locomotive Works between November 1947 and June 1950. It was produced in two different body types, nicknamed the "Babyface" and "Sharknose" styles by railfans, though Baldwin used the same model number for both. 22 "Babyface" cab-equipped A units were built, along with 11 cabless booster B units; 36 "Sharknose" A units and 36 B units were constructed, making a total for all models of 105 locomotives built.

The Missouri Pacific Railroad, who owned a total 12 units, disliked the fact that the locomotives were not MU capable with EMD, etc.,  locomotives without the use of special equipment.


Original buyers

"Babyface" units produced (1947–1948)

Railroad Quantity A units Quantity B units Road numbers A units Road numbers B units Notes
Central Railroad of New Jersey 10 5 70–79 K, L, M, R, S
Missouri Pacific Railroad 8 4 201–208 201B–204B
New York Central Railroad 4 2 3400–3403 3700–3701 Renumbered 3800–3803 (A)
Totals 22 11

"Sharknose" units produced (1949–1950)

Railroad Quantity A units Quantity B units Road numbers A units Road numbers B units Notes
Baldwin Locomotive Works (demonstrators) 2 2 6001A, 6001A1 6001B, 6001B1 to Elgin, Joliet and Eastern Railroad No. 700A/No. 701A (A) No. 700B/No. 701B (B), then to Baltimore and Ohio Railroad 847, 849 (A) 847X, 849X (B), later 4200–4201 (A), 5200–5201 (B).
Pennsylvania Railroad 34 34 9568A–9593A, 9700A–9707A 9568B–9593B, 9700B–9707B 9700A,B–9707A,B were equipped with Baldwin RF-16 bodies and Westinghouse 370G generator, and are therefore referred to by some as "RF-15s." 9583B repowered with an Alco 251B V12 prime mover in December 1959, renumbered 9632B. converted to mobile power unit by Sullian Trail Colliery in 1991, scrapped in 1992.
Totals 36 36

Central Railroad of New Jersey Baldwin DR-4-4-15 "Babyface" No. 77 at Bethlehem, Pennsylvania, October 2, 1966. Photographer unknown.

(Craig Garver, Public domain,



Type and origin
Power type: Diesel-electric
Builder: Baldwin Locomotive Works
Model: DR-4-4-1500
Build date: November 1947 – June 1950
Total produced: 105
​• AAR B-B
Gauge: 4 ft 8+1⁄2 in (1,435 mm) standard gauge
Trucks: AAR Type B
Prime mover: 608SC
Engine type: Four-stroke diesel
Aspiration: Turbocharged
Generator: Westinghouse 471A
Traction motors: Westinghouse 370F (4)
Cylinders: 8
Gear ratio: 15:63
Couplers: AAR type E knuckle
Performance figures
Power output: 1,500 hp (1.12 MW)
Operators: Missouri Pacific, New York Central, Central Railroad of New Jersey, Pennsylvania Railroad, Elgin, Joliet and Eastern, Baltimore and Ohio
Class: PRR- BF15/BF15a, NYC- DFA-4a, CNJ- FD-43
Nicknames: Babyface / Sharknose
Locale: North America
Scrapped: 1962 (B&O, NYC, MP) 1963 (CNJ) 1966 (PRR)
Disposition: All scrapped.


Central Railroad of New Jersey Baldwin DR-4-4-15 70 at Bethlehem, Pennsylvania, November 15, 1964. Photographer: Neil Shankweiler.

(Craig Garver, Public domain,