Alco C-420 (DL721A)

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Data Sheet Information Compiled by: JEAN-DENIS BACHAND
New: 9 April 2005 Drawing by: Jean-Denis Bachand
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Engine Builder: Alco Engine: 4-cycle Model 251C V12
Bore & Stroke 9" X 10.5"
RPM (Maximum / Minimum) 1025 / 400
Main Generator: GE GT581 Horsepower: 2000
Gear Ratio: 74:18 Speed: 70 mph
4-Wheel Configuration: B-B
Traction Motor Blowers: Chicago Model: Mechanical Driven (2)
Weight: 250,000 lbs Traction Motors: GE 752 (four)
Tractive Effort (starting) 57,200 lbs @ 25% Tractive Effort (continuous): 38,000 lbs @ 8 mph
Multiple Unit Capability: Yes Dynamic Braking: Yes
Auxilary Generator: GE GY27 Alternator: GE Exciter
Air Brake: Westinghouse Model: 26LUM
Compressor: Westinghouse Model: 3CDC
Quantity Built: 131 Dates: 6/1963 to 8/1968
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Exterior Dimensions C-424
Total Length 60'-03"
Pilot to Pilot 51'-00"
Wheel Diameter 40"
Truck Wheel Base 9'-04"
Height to Top Engine Hood 15'-06"
Height to Top Cab Hood 15'-03"
Cab Width 10'-00"
Top Walkway Width 9'-07"
Walkway Width 5'-01"
Engine Hood Width 9'-11"
Center Bolster 34'-05"
Center Front Truck to Front Pilot 8'-03"
Center Rear Tucrk to Rear Pilot 8'-03"
Distance between Truck Centers 43'-09"
Minimum Turning Radious 30 degrees
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Fuel Oil: 2400 Lubricating Oil: 250
Engine Cooling Water: 250 Sand Capacity: 28 cu. ft.
Options:
  • Fully Automatic Transition
  • Steam Generator
  • Air Signal Lines
  • Seal Beam with TrainLines Control
  • High Adhesion Trucks
  • Automatic Locomotive Testing
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Somebody's Large Digital Image Here
Drawing by: Jean-Denis Bachand
Reference Sources:
  • Railroad Model Craftsman, May 1983 & July 1988
  • Model Railroader, February 1985
  • Alco: A Centennial Remembrance, by Richard T. Steinbrenner

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