Midland Valley / Missouri, Oklahoma & Gulf 4-4-0 "American" Locomotives in the USA

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Class Details by Steve Llanso of Sweat House Media

Class 32 (Locobase 12724)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 27, p. 148. Works numbers were 24790, 24819 in November 1904 and 31126, 31161 in June 1907.

A 1928 photograph from Mike Condren's website -- http://condrenrails.com/FSVB/Midland%20Valley/30-class-4-4-0.htm -- shows that the 33 at least had been refitted with Southern valve gear. The tender also shows that the Kansas, Oklahoma & Gulf later operated the MV.

A sixth locomotive was sold to the Atlanta, Birmingham & Atlantic; see Locobase 13255.


Class 61 (Locobase 13941)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 43, p. 104. See also KO&G 8 -1918 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. (Thanks to Chris Hohl for his 15 March 2015 email noting the larger tender capacity and inspiring a longer note on the subject in this entry.) A summary of the Muskogee Company empire appears in the Muskogee Company records, DeGolyer Library, Southern Methodist University, http://www.lib.utexas.edu/taro/smu/00131/smu-00131.html, last accessed 26 April 2015. Works numbers were 33558-33559 in July 1909, 33821 in September.

Using the same boiler as the earlier Midland Valley engines (Locobase 12724), the nearby MO&G specified greater cylinder stroke, but lower boiler pressure. The Baldwin spec calls for a "long and low" tender with "trucks well spaced." The tender's water capacity shown is as specified in 1909; the spec doesn't give the fuel capacity.

Hohl called Locobase's attention to the 1918 diagram, which reflects a likely conclusion by the KO&G that they needed to trail more water and fuel capacity. The diagrams show that each of the three Eight-wheelers had a different tender. In the 61 and 63, water capacity rose by only 11% to 5,000 gallons (18,925 litres) while 65's tender increased water capacity by a third to 6,000 gallons (22,710 litres) . All three tenders held 7 tons (6.35 metric tons) of coal, which Locobase supposes was the original capacity.

Each tender had a different wheel base and overall length:

Engine number wheelbase overall length

61 14' 11" (4.55 m) 25' 1 1/2" (7.66 m)

63 16' 5" (5.00 m) 26' 7" (8.10 m)

65 14' 7" (4.44 m) 24' 8" (7.52 m)

Specifications by Steve Llanso of Sweat House Media
Class3261
Locobase ID12,724 13,941
RailroadMidland Valley (KO&G)Missouri, Oklahoma & Gulf (KO&G)
CountryUSAUSA
Whyte4-4-04-4-0
Number in Class43
Road Numbers32-3561, 63, 65
GaugeStdStd
Number Built43
BuilderBurnham, Williams & CoBaldwin
Year19041909
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 9.08 / 2.77 9.08 / 2.77
Engine Wheelbase (ft / m)23.92 / 7.2923.92 / 7.29
Ratio of driving wheelbase to overall engine wheebase 0.38 0.38
Overall Wheelbase (engine & tender) (ft / m)46.5049.37 / 15.05
Axle Loading (Maximum Weight per Axle) (lbs / kg)37,600 / 17,055
Weight on Drivers (lbs / kg)73,000 / 33,11274,700 / 33,883
Engine Weight (lbs / kg)115,000 / 52,163117,100 / 53,116
Tender Loaded Weight (lbs / kg)85,000 / 38,55590,000 / 40,823
Total Engine and Tender Weight (lbs / kg)200,000 / 90,718207,100 / 93,939
Tender Water Capacity (gals / ML)4000 / 15.154500 / 17.05
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)61 / 30.5062 / 31
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)63 / 160063 / 1600
Boiler Pressure (psi / kPa)180 / 12.40165 / 11.40
High Pressure Cylinders (dia x stroke) (in / mm)18" x 24" / 457x61018" x 26" / 457x660
Tractive Effort (lbs / kg)18,885 / 8566.1018,753 / 8506.23
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.87 3.98
Heating Ability
Firebox Area (sq ft / m2)148.80 / 13.83148.40 / 13.79
Grate Area (sq ft / m2)18.50 / 1.7218.50 / 1.72
Evaporative Heating Surface (sq ft / m2)1643 / 152.701643 / 152.64
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1643 / 152.701643 / 152.64
Evaporative Heating Surface/Cylinder Volume232.44214.56
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation33303053
Same as above plus superheater percentage33303053
Same as above but substitute firebox area for grate area26,78424,486
Power L163825396
Power MT385.48318.50

Reference