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EMD DD35A
A Union Pacific DD35A and DD35 back to back at Laramie, Wyoming.
Type and origin
Power type
Diesel-electric
Builder
General Motors Electro-Motive Division (EMD)
Build date
1965
Total produced
15
Specifications
Configuration:
• AAR
D-D
Gauge
4 ft 8+1⁄2 in (1,435 mm)
Wheelbase
Between truck centers: 65 ft 0 in (19.81 m) Truck wheelbase: 17 ft 1+1⁄2 in (5.22 m)
Length
88 ft 2 in (26.87 m)
Width
10 ft 4 in (3.15 m)
Height
cab roof: 14 ft 11+3⁄8 in (4.56 m) overall: 16 ft 4 in (4.98 m)
Loco weight
519,353 lb (235,575 kg)
Fuel capacity
8,230 US gal (31,200 L; 6,850 imp gal)
Prime mover
Dual EMD 16-567D3A
Engine type
V16 diesel
Aspiration
turbocharged
Cylinders
16
Safety systems
Leslie Supertyfon model S5TRRO or S3LR horns
Performance figures
Power output
5,000 hp (3,730 kW)
Career
Operators
Union Pacific
Numbers
70 – 84
Disposition
All scrapped
The EMD DD35A, also known as the EMD DDA35, was a 5,000 hp (3,730 kW) diesel-electric locomotive of D-D wheel arrangement built by General Motors Electro-Motive Division exclusively for the Union Pacific Railroad. They were a cab-equipped variant of the previous, cabless booster (B unit) EMD DD35 (sometimes erroneously called the 'DD35B'). Fifteen DD35A locomotives were built between May and July 1965; they were assigned road numbers 70 through 84. This request also led to the introduction of the ALCO Century 855 and GE U50. A further development of the 8 axle, twin-engined locomotive produced the final, best known type, the DDA40X "Centennial".
The EMDDD35A, also known as the EMD DDA35, was a 5,000 hp (3,730 kW) diesel-electric locomotive of D-D wheel arrangement built by General Motors Electro-Motive...
prime mover. EMD proposed using a meter-gauge version of the Flexicoil-D four-axle bogies, similar to those found under the domestic DD35, DD35A and DDA40X...
its successors General Motors Electro-Motive Division (GM-EMD) and Electro-Motive Diesel (EMD). EMC participated in the construction of a number of motorized...
early 1978. All were sold for scrap during 1977–1978. Union Pacific GTELs EMDDD35A ALCO Century 855 GE U50 Morgan, David P. (May 1969). "Traction topics"...
engines, and rated at 5,500 hp (4,101 kW), it was ALCO's answer to the EMDDD35A and the GE U50. The C855 rode on four two-axle trucks, grouped in pairs...
May and June 1964. Other locomotives built to this requirement were the EMDDD35A and the ALCO Century 855. The Southern Pacific kept the three but did...
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