Hobi Timber Company 2-6-2 "Prairie" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 2 (Locobase 14814)

Data from Builder's card for order C-746 from the American Locomotive Company, posted at http://www.longpix.com/ahobi2.jpg, last accessed 5 January 2013. See also "COOK CREEK TREE" at http://washingtonlookouts.weebly.com/grays-harbor-county.html, which describes the highest-from-the-ground fire lookout station in the world. And http://content.lib.washington.edu/cdm4/item_viewer.php?CISOROOT=/clarkkinsey&CISOPTR=1930 and "Excerpt from the Quinault Forest History" presented by the Heritage Research Center at http://www.heritageresearch.com/ourservices/historicalresearch/naturalculturalresources/quinault.html for the brief bio of the HTC.

Hobi Timber Company incorporated in 1922 and successfully gained access to Washington State's Quinault Reservation when it bought 11,300 acres (4,588 ha) in the Cook Creek Unit estimated to hold 305 million board feet of timber. Frank D. Hobi had managed an earlier timber harvester and owned a logging company.

This logging Mogul arrived soon after the timber company began harvesting.

Hobi sold his interests in 1927 to the Corkery Brothers and Arnold Brandis and later logged at Mineral in Lewis County.

Specifications by Steve Llanso of Sweat House Media
Locobase ID14814
RailroadHobi Timber Company
Number in Class1
Road Numbers2
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase10.50'
Engine Wheelbase24.83'
Ratio of driving wheelbase to overall engine wheebase 0.42
Overall Wheelbase (engine & tender)24.83'
Axle Loading (Maximum Weight per Axle)0
Weight on Drivers107000 lbs
Engine Weight141200 lbs
Tender Light Weight
Total Engine and Tender Weight141200 lbs
Tender Water Capacity1800 gals
Tender Fuel Capacity (oil/coal)800 gals
Minimum weight of rail (calculated)59 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter46"
Boiler Pressure185 psi
Cylinders (dia x stroke)18" x 24"
Tractive Effort26582 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.03
Heating Ability
Firebox Area118 sq. ft
Grate Area24.70 sq. ft
Evaporative Heating Surface1480 sq. ft
Superheating Surface
Combined Heating Surface1480 sq. ft
Evaporative Heating Surface/Cylinder Volume209.38
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4570
Same as above plus superheater percentage4570
Same as above but substitute firebox area for grate area21830
Power L14154
Power MT256.77

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