TCDD DE21500 were diesel-electric locomotives built for operations on Turkish State Railways. Forty General Electric U20C units with GE engines were built in 1964–65. Most of the locomotives are retired from service. The locomotive was a part of the State Railways' dieselisation of its network and was the first mainline diesel locomotive. Most of them were retired in the early 2000s, with a few seeing service into the later half of the decade.

DE21500
DE 21506 at Karabük in 2000.
Type and origin
Power typeDiesel-electric
BuilderGeneral Electric
ModelGE U20C
Build date1964-65
Total produced40
Specifications
Configuration:
 • AARC-C
 • UICCo'Co'
Gauge1,435 mm (4 ft 8+12 in)
Length17.2 m (56 ft 5 in)
Loco weight112 tonnes (110 long tons; 123 short tons)
Prime moverGE FDL12
Engine typeFour-stroke diesel
Cylinders12
Performance figures
Power output1,580 kW (2,120 hp)
Career
OperatorsTurkish State Railways
NumbersDE21501 – DE21540
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