Tuesday, February 8, 2011

Portuguese railways 1520 class diesels


With the usual caveat about 'artistic license', this Portuguese railways poster from the 1950s seems to show a 1520 class diesel in the foreground.

Information about this locomotive class:

Year of entry into service: 1951
Number of Units: 5
Transmission Type: Electric
Nature of service: Line
Track gauge: 1668 mm  

Mechanical parts: American Locomotive Company (ALCO)
Traction motors: American Locomotive Company (ALCO)
Transmission: General Electric
Brake: Knorr-Bremse
Flange lubricators: FIAT type
Speed recorder: Hasler  

'Dead man' safety system: No 
Type of locomotive (builder) RSC 3
Nominal power (wheels): 1730 hp (1273 kW)  

Axle arrangement: (A 1A) (A 1)
Diameter of wheels (new): 1016 mm
Number of driving cabs: 1
Pneumatic brake: Air vacuum 'dual'
Sandboxes (number): 8  

Maximum speed: 120 km / h
Traction force at maximum speed:
    
* On startup: 17,200 kg (μ = 0.22)
    
* The continuous rating: 21 000 kg (not usable due to lack of weight attached)
    
* Speed corresponding to the continuous regimen: 21 km/h (not usable due to lack of weight attached)
    
* Traction weight at maximum speed : 3800 kg
Dynamic braking:
    
* Maximum effort wheels: None
    
* Corresponding speed: None
Weight (empty) (Tonnes):
    
* Traction Motor: 3.28
    
* Main Generator: 4.74
    
* Diesel engine: 14.62
    
* Complete Bogies: 2x21, 1
    
* Total: 64.84
Weights (supplies) (Tonnes):
    
Fuel: 2.530
    
Oil: 0.890
    
Water for cooling: 0.950
    
Sand: 1.200
    
Personal and tools: 0.200
    
Total: 5.770
Weight (total) (Tonnes):
   
Tare Weight: 108.0
    
Weight in running order: 114.0
    Adhesive
weight: 78.0

Prime mover Type: 251-C
Number of strokes: 4
Arrangement and number of cylinders: V 12
Bore and stroke: 228.6 x 266.7 mm
Full Displacement: 131.4 L
Supercharger: Yes
Rated Power (I. C. U.): 2185 hp
Rated speed: 1025 rpm
Power use: 2185 hp 

Type: 1 - C. Generator C. GT 564 5-C1 4 - 5 GE traction motors 752-A1
Essential Features: nose suspended traction motors; forced ventilation; gear ratio 65:18

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