Manila Railroad 2-10-2 Locomotives in Philippines

Class Details by Steve Llanso of Sweat House Media

Class 201 (Locobase 9694)

Data from "New Mountain Type and Santa Fe Type Locomotives for the Manila Railroad", Railway and Locomotive Engineering, Vol XXXV, No. 3 (March 1922), pp. 55-56. Works numbers were 62739-62748 in June 1921.

This class of Santa Fes was built to exactly the same specs as the class 171 Mountains shown in Locobase 9693. Only the driver diameter and weight distribution were different. The design featured a healthy amount of superheat, 11"(279 mm)-diameter piston valves. Although they had among the largest cylinders of any non-articulated Cape gauge engines, these designs had relatively small boilers and grates.

According to the 1922 article: "In designing the locomotives the constructing engineers arranged to have as many as possible of the detail parts of the two types of locomotives the same in order to facilitate maintenance and reduce the number of extra parts which would have to be carried by a road situated at so remote a distance from the point of

manufacture. That the designers succeeded to a high degree is evidenced from the fact that the interchangeable parts include the boiler complete with attachments, cylinders complete, except in height, valve motion parts with exception of eccentric cranks; trailing truck; cab; tenders ; cocks and valves ; fittings and brake cylinders. The following parts are also interchangeable except for the modifications required because of the use of lateral motion driving boxes on the forward axle of the 2-10-2 type locomotive; rods, crank pins, driving axles and driving boxes, driving box saddles, shoes and wedges, equalizing arrangement details and spring hangers."

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID9694
RailroadManila Railroad
Number in Class10
Road Numbers201-210
Number Built10
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)18.33 / 5.59
Engine Wheelbase (ft / m)34.58 / 10.54
Ratio of driving wheelbase to overall engine wheelbase 0.53
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)148,500 / 67,359
Engine Weight (lbs / kg)188,000 / 85,275
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)5000 / 18.94
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)6 / 6
Minimum weight of rail (calculated) (lb/yd / kg/m)50 / 25
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)48 / 1219
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)20" x 28" / 508x711 (3)
Tractive Effort (lbs / kg)53,550 / 24289.90
Factor of Adhesion (Weight on Drivers/Tractive Effort) 2.77
Heating Ability
Tubes (number - dia) (in / mm)130 - 2" / 51
Flues (number - dia) (in / mm)22 - 5.375" / 137
Flue/Tube length (ft / m)18.50 / 5.64
Firebox Area (sq ft / m2)176 / 16.36
Grate Area (sq ft / m2)35.20 / 3.27
Evaporative Heating Surface (sq ft / m2)1999 / 185.78
Superheating Surface (sq ft / m2)493 / 45.82
Combined Heating Surface (sq ft / m2)2492 / 231.60
Evaporative Heating Surface/Cylinder Volume130.90
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation6336
Same as above plus superheater percentage7603
Same as above but substitute firebox area for grate area38,016
Power L16898
Power MT512.04

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