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The reference for locomotives and railcars

Lehigh Valley No. 708 to 712 and 753 to 772

Lehigh Valley classes J-42, J-43 and J-49 to J-52

United States 1895 25 produced
The first built No. 708 Ron Ziel, „American Locomotives 1858 to 1949” PD

Parallel to the five 4-4-0 with the numbers 659 to 663, the Lehigh Valley had five 4-6-0 built by Baldwin in 1895 and gave them the numbers 708 to 712. These were all Camelbacks and were nearly identical apart from the additional driving axle. They were completed by 20 other 4-6-0 with a slightly smaller boiler. The first of those also got a driver diameter of 68 inches, while the other 15 only had 62 inches.

Later when the new class scheme was adopted, they all got the prefix J, what denoted their wheel arrangement. The locomotives with 62 inch drivers were classed into class J-42, while the ones with 68 inches became class J-43. After rebuilds which changed boiler pressure and cylinder size, they were designated classes J-49 to J-52. The last ones were scrapped in 1930.

Technical data

General

Property 708-712 753-757 758-772
Built 1895 1896
Manufacturers Baldwin
Wheel arrangement 4-6-0 (Ten-wheeler)
Gauge 1,435 mm (Standard gauge)

Dimensions and weights

Property 708-712 753-757 758-772
Wheelbase 6.99 m
Service mass 59 t 61.7 t
Adhesion mass 45.4 t 48.1 t
Total mass 97.1 t 99.8 t
Rigid wheelbase 3.66 m
Axle load 15.1 t 16 t
Water capacity 15,142 l

Boiler

Property 708-712 753-757 758-772
Grate area 6.225 m²
Firebox surface 14.586 m² 13.935 m²
Tube heating surface 163.324 m² 159.05 m²
Evaporative heating surface 177.909 m² 172.986 m²
Total heating surface 177.9 m² 173.0 m²

Power plant

Property 708-712 753-757 758-772
Driver diameter 1,727 mm 1,575 mm
Boiler pressure 11 bar
Expansion type simple expansion
Cylinders two, 508 x 610 mm

Power

Property 708-712 753-757 758-772
Power source steam
Estimated power 858 kW (1,167 PS) 820 kW (1,115 PS)
Starting effort 85.4 kN 93.7 kN

Calculated values

Property 708-712 753-757 758-772
Factor of adhesion 1 : 5.21 1 : 5.52 1 : 5.04
Optimal speed 61 km/h 60 km/h 53 km/h
Power-to-weight ratio 14.6 kW/t 13.3 kW/t
Heating Surface Equivalent 250.8 m² 242.7 m²
Cylinder volume/HSE 1 : 985.13 1 : 1,018.34
Adhesive weight/Total 1 : 1.30 1 : 1.28
Tractive force/Heating surface 1 : 10.03 1 : 10.31 1 : 11.31
Grate area/Heating surface 1 : 28.58 1 : 27.79
Firebox/Tube surface 1 : 11.20 1 : 11.41
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