ALCO DL-109

Specifications
Specifications
Configuration:;
• AAR	A1A-A1A
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Trucks	ALCO Trimount
Wheel diameter	40 in (1,016 mm)
Minimum curve	21° (274.37 ft or 83.63 m)
Wheelbase	58 ft 4 in (17.78 m)
Length	DL-103b: 78 ft 11 in (24.05 m); DL-105, DL-107, DL-109: 74 ft 6+1⁄2 in (22.72 m); DL-108, DL-110: 72 ft 4 in (22.05 m)
Width	10 ft (3.05 m)
Height	14 ft 6 in (4.42 m)
Loco weight	DL-103b: 339,000 lb (154,000 kg); DL-105, DL-107, DL-109: 331,000–357,500 lb (150,139.1–162,159.3 kilograms); DL-108, DL-110: 300,700 lb (136,395.2 kilograms)
Fuel capacity	1,200 US gal (4,500 L; 1,000 imp gal)
Prime mover	DL-103b: (2) ALCO 6-538T; DL-105, DL-107/DL-108, DL-109/DL-110: (2) ALCO 6-539T
RPM range	315–740
Engine type	(2) Straight-6 Four-stroke diesel
Aspiration	Turbocharger
Generator	(2) GE GT-557
Traction motors	Passenger: (4) GE 730; Freight: (4) GE 726
Cylinders	6
Cylinder size	12 in × 13 in (305 mm × 330 mm)
Gear ratio	DL-103b: 58:25; DL-105: 71:21; DL-107/DL-108: 64:19; DL-109/DL-110: 58:25 (NH units 64:19)
Loco brake	Straight air
Train brakes	Air

Type and origin
Type and origin
Power type	Diesel-electric
Builder	American Locomotive Company (ALCO)
Model	DL-109
Build date	December 1939–April 1945
Total produced	74 Cab units + 4 Booster units

ALCO DL-109
ALCO DL-109
	An ALCO DL-107 pictured in a publicity postcard for the NYC-SOU-SAL Florida Sunbeam
Power type
Type and origin
Power type	Diesel-electric
Builder	American Locomotive Company (ALCO)
Model	DL-109
Build date	December 1939–April 1945
Total produced	74 Cab units + 4 Booster units
Configuration:;
Specifications
Configuration:;
• AAR	A1A-A1A
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Trucks	ALCO Trimount
Wheel diameter	40 in (1,016 mm)
Minimum curve	21° (274.37 ft or 83.63 m)
Wheelbase	58 ft 4 in (17.78 m)
Length	DL-103b: 78 ft 11 in (24.05 m); DL-105, DL-107, DL-109: 74 ft 6+1⁄2 in (22.72 m); DL-108, DL-110: 72 ft 4 in (22.05 m)
Width	10 ft (3.05 m)
Height	14 ft 6 in (4.42 m)
Loco weight	DL-103b: 339,000 lb (154,000 kg); DL-105, DL-107, DL-109: 331,000–357,500 lb (150,139.1–162,159.3 kilograms); DL-108, DL-110: 300,700 lb (136,395.2 kilograms)
Fuel capacity	1,200 US gal (4,500 L; 1,000 imp gal)
Prime mover	DL-103b: (2) ALCO 6-538T; DL-105, DL-107/DL-108, DL-109/DL-110: (2) ALCO 6-539T
RPM range	315–740
Engine type	(2) Straight-6 Four-stroke diesel
Aspiration	Turbocharger
Generator	(2) GE GT-557
Traction motors	Passenger: (4) GE 730; Freight: (4) GE 726
Cylinders	6
Cylinder size	12 in × 13 in (305 mm × 330 mm)
Gear ratio	DL-103b: 58:25; DL-105: 71:21; DL-107/DL-108: 64:19; DL-109/DL-110: 58:25 (NH units 64:19)
Loco brake	Straight air
Train brakes	Air
Maximum speed
Performance figures
Maximum speed	80–120 mph (129–193 km/h)
Power output	2,000 hp (1,490 kW)
Tractive effort	56,250 lb (25,510 kg)
Class
Career
Class	MILW: 20-AP-6, NH: DER-1/b/c
Locale	U.S.A.
Disposition	All scrapped

The ALCO DL-109 was one of six models of A1A-A1A diesel locomotives built to haul passenger trains by the American Locomotive Company (ALCO) between December, 1939 and April, 1945 ("DL" stands for Diesel Locomotive). They were of a cab unit design, and both cab-equipped lead A units DL-103b, DL-105, DL-107, DL-109 and cabless booster B units DL-108, DL-110 models were built. The units were styled by noted industrial designer Otto Kuhler, who incorporated into his characteristic cab (US Patent D121,219) the trademark three-piece windshield design. A total of 74 cab units and four cabless booster units were built.