Mobile, Jackson & Kansas City 4-6-0 "Ten-wheeler" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 10 (Locobase 13057)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 30, p. . Works numbers were 29980-29981 in January 1907.

Most of the orders recorded in Baldwin's books were filled for the original purchaser. But the eight locomotives intended for the Morelia y Tacambaro in Guanajunto, Mexico were redirected to several other railroads.

Two went to the MJ&KC which was reorganized in 1909 as the New Orleans, Mobile & Chicago and in 1917 that name was supplanted by the Gulf, Mobile & Northern. The GM&N sold the 10 to locomotive rebuilder/reseller Birmingham Rail & Locomotive in 1925. BR & L found a buyer in May 1928 in the Savannah & Northwestern, which renumbered the engine 226. The S & N rebuilt the 226 as a freight engine and renumbered it 114.

In the same year as the 10's disposal, the GM&N sold the 12 to another locomotive rebuilder/reseller Southern Iron & Equipment. SI & E's customer turned out to be the Marianna Long Pine Company in February 1927.


Class 70 (Locobase 11520)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 26, p. 195. Works numbers were 23308, 23324, 23336, 23338 in December 1903; 23649, 23660 in January 1904; 25011, 25017, 25023 in January 1905; 25864, 25867 in June.

In 1909, the MJ & KC was reorganized as the New Orleans, Mobile & Chicago and in 1917 that name was supplanted by the Gulf, Mobile & Northern. More than two decades later the GM & N was combined with other railroads to form the Gulf, Mobile & Ohio in 1940


Class 85 (Locobase 13237)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 31, p. 120. Works numbers were 32355, 32421, 32489, and 32514 in December 1907.

Following up the assembly of a larger stud of 19" x 24" Ten-wheelers, the MJ & KC bought this quartet with more cylinder volume thanks to a longer stroke and 29 more tubes in the boiler.

When the MJ & KC's successor New Orleans, Mobile & Chicago was absorbed by the Gulf, Mobile & Northern in 1917, the four were renumbered by adding a 1 and eventually rebuilt with 63" drivers.

Specifications by Steve Llanso of Sweat House Media
Class107085
Locobase ID13,057 11,520 13,237
RailroadMobile, Jackson & Kansas City (GM & N)Mobile, Jackson & Kansas City (GM & N)Mobile, Jackson & Kansas City (GM & N)
CountryUSAUSAUSA
Whyte4-6-04-6-04-6-0
Number in Class264
Road Numbers10, 1270-75, 79-8485-88
GaugeStdStdStd
Number Built264
BuilderBurnham, Williams & CoBurnham, Williams & CoBurnham, Williams & Co
Year190719031907
Valve GearStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)14.251414.25
Engine Wheelbase (ft)24.922424.25
Ratio of driving wheelbase to overall engine wheebase 0.57 0.58 0.59
Overall Wheelbase (engine & tender) (ft)
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)88,000111,000113,500
Engine Weight (lbs)120,000140,000146,500
Tender Loaded Weight (lbs)80,000100,000120,000
Total Engine and Tender Weight (lbs)200,000240,000266,500
Tender Water Capacity (gals)400050006000
Tender Fuel Capacity (oil/coal) (gals/tons)8
Minimum weight of rail (calculated) (lb/yd)496263
Geometry Relating to Tractive Effort
Driver Diameter (in)545656
Boiler Pressure (psi)180200200
High Pressure Cylinders (dia x stroke) (in)18" x 24"19" x 24"19" x 26"
Tractive Effort (lbs)22,03226,30128,493
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.99 4.22 3.98
Heating Ability
Firebox Area (sq ft)144174.70175.50
Grate Area (sq ft)17.3024.8724.70
Evaporative Heating Surface (sq ft)178821432340
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)178821432340
Evaporative Heating Surface/Cylinder Volume252.95272.10274.26
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation311449744940
Same as above plus superheater percentage311449744940
Same as above but substitute firebox area for grate area25,92034,94035,100
Power L1574871497039
Power MT432.01425.97410.18


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