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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-1a T-1a T-2a T-2b T-3
Built	1931-1932
Manufacturers	Baldwin
Wheel arrangement	2D2
Gauge	1435 mm
Length
Service mass	187411 kg
Top speed
Power
Engine

General

Property	Lehigh Valley classes T-1 to T-3 T-1a T-1a T-2a T-2b T-3 Remove
Built	1931-1932
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-1a T-1a T-2a T-2b T-3 Remove
Wheelbase	13.69 m
Total wheelbase	28.92 m
Service mass	187.4 t
Adhesion mass	122.5 t
Total mass	368.1 t
Rigid wheelbase	5.87 m
Axle load	30.6 t
Water capacity	75,708 l
Fuel capacity	27.2 t (coal)

Boiler

Property	Lehigh Valley classes T-1 to T-3 T-1a T-1a T-2a T-2b T-3 Remove
Grate area	8.203 m²
Firebox surface	45.523 m²
Tube heating surface	458.198 m²
Evaporative heating surface	503.721 m²
Superheater surface	209.589 m²
Total heating surface	713.3 m²

Power plant

Property	Lehigh Valley classes T-1 to T-3 T-1a T-1a T-2a T-2b T-3 Remove
Driver diameter	1,778 mm
Boiler pressure	17.2 bar
Expansion type	simple expansion
Cylinders	two, 686 x 762 mm

Power

Property	Lehigh Valley classes T-1 to T-3 T-1a T-1a T-2a T-2b T-3 Remove
Power source	steam
Estimated power	3,281 kW (4,461 PS)
Starting effort	295.3 kN
Starting effort booster	81.669 kN

Calculated values

Property	Lehigh Valley classes T-1 to T-3 T-1a T-1a T-2a T-2b T-3 Remove
Factor of adhesion	1 : 4.07
Optimal speed	68 km/h
Power-to-weight ratio	17.5 kW/t
Heating Surface Equivalent	1,150.5 m²
Cylinder volume/HSE	1 : 489.30
Adhesive weight/Total	1 : 1.53
Tractive force/Heating surface	1 : 8.65
Grate area/Heating surface	1 : 86.96
Firebox/Tube surface	1 : 10.07
Total/Superheater	1 : 2.40

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