Mineral Range / Mississippi Railway 2-8-0 "Consolidation" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 190 (Locobase 11478)

Data from "New Locomotive Building," The Railway Age, Vol XXXII, (2 August 1901), p 93.

As competition grew in the Keeweenaw Peninsula (and stole much of the original traffic) the MRR threw out branches in several directions ,e eventually connecting Houghton with Lake Linden and Calumet.

By the time of the purchase of the Consolidations in this entry, the MRR had converted to the standard gauge and was operated in conjunction with the Duluth, South Shore & Atlantic. In 1901, one State of Michigan rport claimed, "The passenger train service furnished by this company, in connection with the Duluth, South Shore & Atlantic trains, from Keweenaw Bay to Ontonagon is all that could be desired. No fencing on this line and apparently no necessity for any. Switches blocked as required by law: crossing signs and plank in good order."

NB: Tube length is an estimate based on the calculation of tube surface area by subtracting reported firebox heating surface from reported total evaporative heating surface

Class 4 (Locobase 13831)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 39, p. 78. See also a history of Pelahatchie, Mississippi at http://www.pelahatchie.org/history.php, last accessed 4 February 2012. Works number was 36756 in August 1911.

Pelahatchie, Miss had a long history even before Lockwood Lumber set up a sawmill in 1907, but lumber operations spurred rapid growth. To support Lockwood's operations, the company built the MRwy between Pelahatchie and River Hill some 25 miles (40.25 km) away.

A note in the Baldwin specs noted that the 16" (406 mm) stack as delivered was too large for this small Consolidation: "Hereafter furnish a straight stack 16" diameter or a taper stack of smaller diameter." The locomotive's springs were inevitably to be "...amply strong to stand rough track."

The 2 didn't remain with the MRwy for long. It was sold to locomotive rebuilder/reseller Southern Iron & Equipment in 1918. SI & E found a buyer in Mississippi Soft Pine of Canton, which later sold the engine to Lutcher Moore Cypress of St James Parish.

Specifications by Steve Llanso of Sweat House Media
Locobase ID11478 13831
RailroadMineral RangeMississippi Railway
Number in Class101
Road Numbers1904
Number Built101
Valve GearStephensonWalschaert
Locomotive Length and Weight
Driver Wheelbase12.50'
Engine Wheelbase19.33'
Ratio of driving wheelbase to overall engine wheebase 0.65
Overall Wheelbase (engine & tender)45.37'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers75000 lbs
Engine Weight200000 lbs85000 lbs
Tender Light Weight70000 lbs
Total Engine and Tender Weight155000 lbs
Tender Water Capacity6000 gals3500 gals
Tender Fuel Capacity (oil/coal)10 tons6 tons
Minimum weight of rail (calculated)031 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter55"44"
Boiler Pressure200 psi175 psi
Cylinders (dia x stroke)22" x 30"16" x 22"
Tractive Effort44880 lbs19040 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.94
Heating Ability
Firebox Area223 sq. ft92 sq. ft
Grate Area36 sq. ft16.60 sq. ft
Evaporative Heating Surface3123 sq. ft972 sq. ft
Superheating Surface
Combined Heating Surface3123 sq. ft972 sq. ft
Evaporative Heating Surface/Cylinder Volume236.61189.86
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation72002905
Same as above plus superheater percentage72002905
Same as above but substitute firebox area for grate area4460016100
Power L158873590
Power MT422.11

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