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 | |
|---|---|
| Class | 45 |
| Locobase ID | 14996 |
| Railroad | Manila |
| Country | Philippines |
| Whyte | 4-6-0 |
| Number in Class | 20 |
| Road Numbers | 45-64 |
| Gauge | 3'6" |
| Number Built | 20 |
| Builder | Porter |
| Year | 1919 |
| Valve Gear | Walschaert |
| 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 / 1240 |
| 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 Volume | 177.36 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3150 |
| Same as above plus superheater percentage | 3654 |
| Same as above but substitute firebox area for grate area | 26,726 |
| Power L1 | 8708 |
| Power MT | 778.29 |