Lehigh Valley class K-6b
United States 1924 12 produced
In 1924, ALCO-Brooks built ten K-6b Pacifics for the Lehigh Valley. Their weight was between that of the K-4 and K-5, but they had the larger 77 inch drivers and the same cylinder dimensions as the K-3. Two others were rebuilt in the LV's Sayre Shops from K-3 in 1925 and 1926. In 1939 and 1940, three were streamlined with casings designed by Otto Kuhler.
Technical data
General
- Built
- 1924-1926
- Manufacturers
- ALCO, Sayre
- Wheel arrangement
- 4-6-2 (Pacific)
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Wheelbase
- 11.13 m
- Total wheelbase
- 22.25 m
- Service mass
- 132 t
- Adhesion mass
- 82.1 t
- Total mass
- 221.6 t
- Rigid wheelbase
- 4.17 m
- Axle load
- 27.4 t
- Water capacity
- 39,747 l
- Fuel capacity
- 13.6 t (coal)
Boiler
- Grate area
- 6.996 m²
- Firebox surface
- 30.472 m²
- Tube heating surface
- 274.715 m²
- Evaporative heating surface
- 305.187 m²
- Superheater surface
- 87.793 m²
- Total heating surface
- 393.0 m²
Power plant
- Driver diameter
- 1,956 mm
- Boiler pressure
- 14.8 bar
- Expansion type
- simple expansion
- Cylinders
- two, 635 x 711 mm
Power
- Power source
- steam
- Estimated power
- 2,424 kW (3,296 PS)
- Starting effort
- 184.8 kN
Calculated values
- Factor of adhesion
- 1 : 4.36
- Optimal speed
- 80 km/h
- Power-to-weight ratio
- 18.4 kW/t
- Heating Surface Equivalent
- 633.1 m²
- Cylinder volume/HSE
- 1 : 711.48
- Adhesive weight/Total
- 1 : 1.61
- Tractive force/Heating surface
- 1 : 9.82
- Grate area/Heating surface
- 1 : 56.17
- Firebox/Tube surface
- 1 : 9.02
- Total/Superheater
- 1 : 3.48
