Manila 4-6-0 Locomotives in Philippines

Class Details by Steve Llanso of Sweat House Media

Class 45 (Locobase 14996)

Data from Roy V Wright (Ed.) 1922 Locomotive Cyclopedia of American Practice, Sixth Edition (New York: Simmons-Boardman Publishing Company, 1922), p. 1024. See also "Fuel Economy Important Consideration in Philippine Islands", Railway Review (23 July 1921), p. 115. Works numbers were 6385-6394 in May 1919 and 6624-6633 in May 1921.

This Ten-wheeler design came in two batches with the purchase of the second decade prompted by the MR's great satisfaction with the first batch. RR reported that the railroad had told Porter that "these locomotives have proved the most economical locomotives from the standpoint of fuel consumption of any ...on the Manila Railroad."

The straight boiler carried the steam dome over the middle driving set and a thinner sand dome farther forward over the interval between the lead driving set and the rear truck axle. To protect the fireman, the cab's roof extended to the rear, sheltering the locomotive-tender connection.

When the MR converted to diesel power in 1954, surviving 45 class 4-6-0s pulled ballast trains for the maintenance of way department.

Principal Dimensions by Steve Llanso of Middle Run Media

Locobase ID14996
Number in Class20
Road Numbers45-64
Number Built20
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)11.50 / 3.51
Engine Wheelbase (ft / m)21 / 6.40
Ratio of driving wheelbase to overall engine wheelbase 0.55
Overall Wheelbase (engine & tender) (ft / m)47.83 / 14.58
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)74,000 / 33,566
Engine Weight (lbs / kg)94,000 / 42,638
Tender Loaded Weight (lbs / kg)68,000 / 30,844
Total Engine and Tender Weight (lbs / kg)162,000 / 73,482
Tender Water Capacity (gals / ML)3000 / 11.36
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)5 / 5
Minimum weight of rail (calculated) (lb/yd / kg/m)41 / 20.50
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)16" x 22" / 406x559
Tractive Effort (lbs / kg)17,952 / 8142.90
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.12
Heating Ability
Tubes (number - dia) (in / mm)88 - 2" / 51
Flues (number - dia) (in / mm)13 - 5.5" / 140
Flue/Tube length (ft / m)12.25 / 3.73
Firebox Area (sq ft / m2)128 / 11.89
Grate Area (sq ft / m2)17.50 / 1.63
Evaporative Heating Surface (sq ft / m2)908 / 84.36
Superheating Surface (sq ft / m2)172 / 15.98
Combined Heating Surface (sq ft / m2)1080 / 100.34
Evaporative Heating Surface/Cylinder Volume177.36
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3150
Same as above plus superheater percentage3654
Same as above but substitute firebox area for grate area26,726
Power L18708
Power MT778.29

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