loco-info.com - Lehigh Valley class K-6b

No. 2095 in Mauch Chunk, Pennsylvania, now known as Jim Thorpe

Clinton T. Andrews / collection Taylor Rush

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.

General
Built	1924-1926
Manufacturer	ALCO, Sayre
Axle config	4-6-2 (Pacific)
Gauge	4 ft 8 1/2 in (Standard gauge)

Dimensions and Weights
Wheelbase	36 ft 6 in
Rigid wheelbase	13 ft 8 in
Total wheelbase	73 ft
Service weight	291,000 lbs
Adhesive weight	181,000 lbs
Total weight	488,500 lbs
Axle load	60,400 lbs
Water capacity	10,500 us gal
Fuel capacity	30,000 lbs (coal)

Boiler
Grate area	75.3 sq ft
Firebox area	328 sq ft
Tube heating area	2,957 sq ft
Evaporative heating area	3,285 sq ft
Superheater area	945 sq ft
Total heating area	4,230 sq ft

Power Plant
Driver diameter	77 in
Boiler pressure	215 psi
Expansion type	simple
Cylinders	two, 25 x 28 in

Power
Power source	steam
Estimated power	3,250 hp (2,424 kW)
Starting effort	41,534 lbf

Calculated Values
Factor of adhesion	1 : 4.36
Optimal speed	50 mph
Power-to-weight ratio	0.0112 hp/lb
Heating Area Equivalent	6,815 sq ft
Cylinder volume/HAE	1 : 711.48
Adhesive weight/Total	1 : 1.61
Tractive force/Heating area	1 : 2207.38
Grate area/Heating area	1 : 51.82
Firebox/Tube area	1 : 11.90
Total/Superheater	1 : 3.48

steam locomotive

express

streamline

last changed: 05/2024

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