Brooks Locomotive Works 2-6-0 "Mogul" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class unknown (Locobase 16588)

Data from "Specification of Mogul Locomotive by the Brooks Locomotive Works", Railroad Gazette, Volume 9 (17 August 1877), p. 378.

Locobase has looked at several Brooks production list compilations and none show a locomotive with this combination of cyinder bore and stroke, driver diameter, and gauge. (Most of Brooks's 2-6-0s during this period were built for the 3-foot (914 mm) gauge and many of those used 11" x 16" cylinders..).

Of Locobase 9193--Baldwin's 1875 quartet of Moguls for the Virginia & Truckee--compares most closely in boiler size and cyilnder volume to this proposal. Baldwin produced only twelve such engines during the 1870s. Baldwin's "Standard Mogul" of 1876 (Locobase 9676) had very similar dimensions as well and used 18" cylinders.

Brooks cast each cylinder and half saddle in one piece, used cast steel in the firebox, driving wheel tires, wrist pins and other components. The firebox could burn either wood or bituminous coal. It sat between the second and third driving axles, which spread the wheelbase.

From orders that followed this August 1877 description, it seems likely that Brooks went with trends and increased cylinder diameters by 1".

Principal Dimensions by Steve Llanso of Sweat House Media

Classunknown
Locobase ID16588
RailroadBrooks Locomotive Works
CountryUSA
Whyte2-6-0
Number in Class1
Road Numbers
GaugeStd
Number Built1
BuilderBrooks
Year1877
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)15 / 4.57
Engine Wheelbase (ft / m)22.50 / 6.86
Ratio of driving wheelbase to overall engine wheelbase 0.67
Overall Wheelbase (engine & tender) (ft / m)46.50 / 14.10
Axle Loading (Maximum Weight per Axle) (lbs / kg)10,730 / 4867
Weight on Drivers (lbs / kg)64,500 / 29,257
Engine Weight (lbs / kg)75,000 / 34,019
Tender Loaded Weight (lbs / kg)91,300 / 41,413
Total Engine and Tender Weight (lbs / kg)166,300 / 75,432
Tender Water Capacity (gals / ML)2400 / 9.09
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)36 / 18
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56 / 1422
Boiler Pressure (psi / kPa)165 / 11
High Pressure Cylinders (dia x stroke) (in / mm)17" x 24" / 432x610
Tractive Effort (lbs / kg)17,371 / 7879.36
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.71
Heating Ability
Tubes (number - dia) (in / mm)160 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)11 / 3.35
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)16 / 1.49
Evaporative Heating Surface (sq ft / m2)
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)
Evaporative Heating Surface/Cylinder Volume
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2640
Same as above plus superheater percentage2640
Same as above but substitute firebox area for grate area
Power L1
Power MT

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