Klamath Lake 2-6-2 "Prairie" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 12912)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 28, p. Works number was 27686 in March 1906.

Locobase is puzzled by the wood-burning firebox on this logging Prairie. It seems much too small to serve the very large boiler that rode in front of it. It was designed to overcome simultaneously 2% grades and uncompensated 24-deg curves. One grade actually pitched up at 3.6%.

According to Gene Connelly's Baldwin list, the 1 was sold in 1914 to the Siskiyou Electric Power & Light Co. The SEP & L operated the engine for 25 years before selling it in 1939 to the 12-mile Central Amador Railroad, which operated on the 12-mile line between Ione and Martell, California. The CAR put it into service as the #6.

The 6 was scrapped in 1945.

Specifications by Steve Llanso of Sweat House Media
Locobase ID12912
RailroadKlamath Lake
Number in Class1
Road Numbers1
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase10.50'
Engine Wheelbase26.58'
Ratio of driving wheelbase to overall engine wheebase 0.40
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers100000 lbs
Engine Weight137000 lbs
Tender Light Weight60000 lbs
Total Engine and Tender Weight197000 lbs
Tender Water Capacity3000 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)56 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter44"
Boiler Pressure180 psi
Cylinders (dia x stroke)17" x 24"
Tractive Effort24118 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.15
Heating Ability
Firebox Area128.60 sq. ft
Grate Area15.80 sq. ft
Evaporative Heating Surface2401 sq. ft
Superheating Surface
Combined Heating Surface2401 sq. ft
Evaporative Heating Surface/Cylinder Volume380.81
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2844
Same as above plus superheater percentage2844
Same as above but substitute firebox area for grate area23148
Power L16373
Power MT421.50

If you have any railroad data such as diagram books, rail station plans or anything else that you would be willing to share, please contact us.