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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-3 T-1a T-2a T-2b T-3
Built	1934-1935
Manufacturers	Baldwin
Wheel arrangement	2D2
Gauge	1435 mm
Length
Service mass	197313 kg
Top speed
Power
Engine

General

Property	Lehigh Valley classes T-1 to T-3 T-3 T-1a T-2a T-2b T-3 Remove
Built	1934-1935
Manufacturers	Baldwin
Wheel arrangement	4-8-4 (Northern)
Gauge	1,435 mm

Dimensions and weights

Property	Lehigh Valley classes T-1 to T-3 T-3 T-1a T-2a T-2b T-3 Remove
Wheelbase	14.00 m
Total wheelbase	29.01 m
Service mass	197.3 t
Adhesion mass	123.5 t
Total mass	373.8 t
Rigid wheelbase	6.10 m
Axle load	31 t
Water capacity	75,708 l
Fuel capacity	27.2 t (coal)

Boiler

Property	Lehigh Valley classes T-1 to T-3 T-3 T-1a T-2a T-2b T-3 Remove
Grate area	8.965 m²
Firebox surface	47.102 m²
Tube heating surface	458.198 m²
Evaporative heating surface	505.3 m²
Superheater surface	191.009 m²
Total heating surface	696.3 m²

Power plant

Property	Lehigh Valley classes T-1 to T-3 T-3 T-1a T-2a T-2b T-3 Remove
Driver diameter	1,956 mm
Boiler pressure	19 bar
Expansion type	simple expansion
Cylinders	two, 686 x 762 mm

Power

Property	Lehigh Valley classes T-1 to T-3 T-3 T-1a T-2a T-2b T-3 Remove
Power source	steam
Estimated power	3,729 kW (5,070 PS)
Starting effort	295.3 kN

Calculated values

Property	Lehigh Valley classes T-1 to T-3 T-3 T-1a T-2a T-2b T-3 Remove
Factor of adhesion	1 : 4.10
Optimal speed	77 km/h
Power-to-weight ratio	18.9 kW/t
Heating Surface Equivalent	1,122.8 m²
Cylinder volume/HSE	1 : 501.37
Adhesive weight/Total	1 : 1.60
Tractive force/Heating surface	1 : 8.86
Grate area/Heating surface	1 : 77.67
Firebox/Tube surface	1 : 9.73
Total/Superheater	1 : 2.65

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