Ocean Shore / Ohio Southern 2-6-0 "Mogul" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 21 (Locobase 13262)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 47, p. 249. See Locobase 13260 for a history of the Pacific's OSRR. Works numbers were 39760-39761 in May 1913.

The OSRR preferred to buy Moguls for its freight operations, at least when it ordered from Baldwin. These were considerably bigger than the pair delivered in 1908 (Locobase 13260).

When the railroad abruptly closed its doors in 1920, the 21 went to the Pacific Lumber Company as their #34 and 22 wound up as #61 on the Arkansas & Louisiana Missouri, itself the successor to the Arkansas & Louisiana Midland. After decades of use on the PLC, that company sold the 34 in April 1942 to the Red River Lumber Company. The A & LM quickly passed the 22 on to the W R Pickerling Lumber Company of Springfield, Mo.


Class 31 (Locobase 13263)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 51, p.323. See Locobase 13260 for a history of the Pacific's OSRR. Works numbers were 41392-41393 in May 1914.

The third pair of Baldwin Moguls delivered to the OSRR split the difference in size and power between the first two sets. Nevertheless, many components were designed to be interchangeable with the earlier locomotives.

When the railroad suddenly filed for abandonment in 1920, the 31 and 32 were purchased by the Fruit Growers Supply Company.


Class 34 (Locobase 12135)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 19, p. 191. Works numbers were 11499-11504 in October 1895.

OS RR ordered 8 locomotives of this basic Mogul design. The first 2 had 248 tubes and, most likely, a total heating surfaces of 1,663 sq ft. The specifications note other small differences including fractions of an inch on the firebox length and width.

All eight were taken into the Detroit Southern in 1901 and the Detroit, Toledo & Ironton in 1905. None of them had number changes. 34 was disposed of by 1911, the others by 1918.


Class 42 (Locobase 13264)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 51, p.327. See Locobase 13260 for a history of the Pacific's OSRR. Works number was 41999 in April 1915.

The last Baldwin locomotive shipped to the OSRR on the Pacific Coast represented an anomaly. It was considerably smaller than the other Moguls and much less powerful.

The closing of the OSRR in 1920 would lead to the 42's departure for the Yuma Valley Railroad as their #2. The YVRR sold the engine to the Imperial Irrigation, which renumbered the engine 152.


Class 5 (Locobase 13260)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 31, p. 178. See also "Ocean Shore Electric Railway," Locomotive Firemen's Magazine, Volume 39, Number 9 (September 1905), pp. 306-307. Works numbers were 32627, 32646 in January 1908.

For once an independent railroad got the better of the Octopus known as the Southern Pacific - at least for a while. The Ocean Shore's name accurately described its alignment, a railway perched above the Pacific from San Francisco to Santa Cruz. "This new route," explained the LFM article, "will invade a rich and splendid region heretofore deprived of direct railway transportation. For that reason the project is a most important one, both to San Francisco and Santa Cruz, and the intermediate territory ... It is quite probable that the Southern Pacific will soon construct a road to parallel that of the Ocean Shore, as the territory is too rich to abandon to a rival company."

It was an 83-mile-long electric railroad, but operated steam-powered, oil-fired locomotives as well. These latter engines (which each cost $12,455) were the subject of a 1911 complaint by the Mission Promotion Association which contended that the original charter allowed only for electric operation.

The OSRR's closure in 1920 was prompted by a railway labor board decision to increase the wages of its workers. The railroad felt squeezed between a rapid increase in wages in the past couple of years and San Francisco's refusal to grant a fare increase on the electric railway system without a vote in a general election. The OSRR therefore announced it would accept no more business and would tear up its tracks. See Paul Eliel's report in the National Municipal Review of November 1920 (pp. 722) for a discussion of the then-novel idea of having the City of San Francisco take over operation of ex-OSRR trackage within the city's boundaries.

Specifications by Steve Llanso of Sweat House Media
Class213134425
Locobase ID13,262 13,263 12,135 13,264 13,260
RailroadOcean ShoreOcean ShoreOhio SouthernOcean ShoreOcean Shore
CountryUSAUSAUSAUSAUSA
Whyte2-6-02-6-02-6-02-6-02-6-0
Number in Class22612
Road Numbers21-2231-3236-41 /425-6
GaugeStdStdStdStdStd
Number Built22612
BuilderBaldwinBaldwinBurnham, Williams & CoBaldwinBurnham, Williams & Co
Year19131914189419151908
Valve GearWalschaertWalschaertStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)13121412.5012.67
Engine Wheelbase (ft)2220.332219.7520.12
Ratio of driving wheelbase to overall engine wheebase 0.59 0.59 0.64 0.63 0.63
Overall Wheelbase (engine & tender) (ft)51.6250.1948.87
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)135,000120,000102,00089,500109,700
Engine Weight (lbs)153,000139,000120,000102,500124,000
Tender Loaded Weight (lbs)100,000100,00090,00070,000
Total Engine and Tender Weight (lbs)253,000239,000192,500194,000
Tender Water Capacity (gals)50006000400045003500
Tender Fuel Capacity (oil/coal) (gals/tons)2500300020001000
Minimum weight of rail (calculated) (lb/yd)7567575061
Geometry Relating to Tractive Effort
Driver Diameter (in)5757545448
Boiler Pressure (psi)200180180180180
High Pressure Cylinders (dia x stroke) (in)21" x 28"20" x 26"19" x 24"18" x 24"18" x 24"
Tractive Effort (lbs)36,82727,91624,54822,03224,786
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.67 4.30 4.16 4.06 4.43
Heating Ability
Firebox Area (sq ft)165138164.18122152
Grate Area (sq ft)30.402623.7026.8022.70
Evaporative Heating Surface (sq ft)20531884174811851592
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)20531884174811851592
Evaporative Heating Surface/Cylinder Volume182.90199.28221.95167.64225.22
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation60804680426648244086
Same as above plus superheater percentage60804680426648244086
Same as above but substitute firebox area for grate area33,00024,84029,55221,96027,360
Power L148724656528441144791
Power MT238.69256.62342.62304.02288.85


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