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Lehigh Valley classes T-1 to T-3

T-2b No. 5215 while taking water

The Lehigh Valley used the 4-8-4, which they dubbed “Wyoming” after the Wyoming Valley in Pennsylvania, primarily for freight trains. After one prototype each from Baldwin and ALCO, ten more were procured as T-1a and ...

	Lehigh Valley classes T-1 to T-3 Remove
Variant	T-2a T-1a T-2a T-2b T-3
Built	1931-1932
Manufacturers	ALCO
Wheel arrangement	2D2
Gauge	1435 mm
Length
Service mass	191416 kg
Top speed
Power
Engine

General

Property	Lehigh Valley classes T-1 to T-3 T-2a T-1a T-2a T-2b T-3 Remove
Built	1931-1932
Manufacturers	ALCO
Wheel arrangement	4-8-4 (Northern)
Gauge	1,435 mm

Dimensions and weights

Property	Lehigh Valley classes T-1 to T-3 T-2a T-1a T-2a T-2b T-3 Remove
Wheelbase	13.89 m
Total wheelbase	29.10 m
Service mass	191.4 t
Adhesion mass	121.6 t
Total mass	354.2 t
Rigid wheelbase	5.87 m
Axle load	30.4 t
Water capacity	68,137 l
Fuel capacity	25.4 t (coal)

Boiler

Property	Lehigh Valley classes T-1 to T-3 T-2a T-1a T-2a T-2b T-3 Remove
Grate area	8.203 m²
Firebox surface	47.195 m²
Tube heating surface	458.291 m²
Evaporative heating surface	505.486 m²
Superheater surface	208.382 m²
Total heating surface	713.9 m²

Power plant

Property	Lehigh Valley classes T-1 to T-3 T-2a T-1a T-2a T-2b T-3 Remove
Driver diameter	1,778 mm
Boiler pressure	17.6 bar
Expansion type	simple expansion
Cylinders	two, 660 x 813 mm

Power

Property	Lehigh Valley classes T-1 to T-3 T-2a T-1a T-2a T-2b T-3 Remove
Power source	steam
Estimated power	3,337 kW (4,537 PS)
Starting effort	298.0 kN
Starting effort booster	81.669 kN

Calculated values

Property	Lehigh Valley classes T-1 to T-3 T-2a T-1a T-2a T-2b T-3 Remove
Factor of adhesion	1 : 4.00
Optimal speed	69 km/h
Power-to-weight ratio	17.4 kW/t
Heating Surface Equivalent	1,158.2 m²
Cylinder volume/HSE	1 : 480.76
Adhesive weight/Total	1 : 1.57
Tractive force/Heating surface	1 : 8.72
Grate area/Heating surface	1 : 87.03
Firebox/Tube surface	1 : 9.71
Total/Superheater	1 : 2.43

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