Similar to the F-1s procured by the Mexican Railway in 1882, these had smaller cylinders and pressed the boilers to a lesser extent. Also, the locomotives were considerably lighter and had smaller drivers.
Clearly, the P & T was not a heavy-rail railway. This relatively young locomotive was lighter than almost any other Ten-wheeler supplied to a North American standard gauge railroad in the 20th Century.
A pair of Rhode Island Ten-wheelers that were among the largest and most powerful Ten-wheelers delivered in that era. Their power came from a relatively large firebox.
| Specifications | |||
|---|---|---|---|
| Class | PF-1 | PF-2 | PF-3 |
| Locobase ID | 6958 | 6959 | 6960 |
| Railroad | FC de Pachuca a Tampico | FC de Pachuca a Tampico | FC de Pachuca a Tampico |
| Whyte | 4-6-0 | 4-6-0 | 4-6-0 |
| Road Numbers | |||
| Gauge | Std | Std | Std |
| Builder | Burnham, Parry, Williams & Co | Alco | Rhode Island |
| Year | 1887 | 1907 | 1891 |
| Valve Gear | Stephenson | Stephenson | Stephenson |
| Locomotive Length and Weight | |||
| Driver Wheelbase | 12.50' | 10.40' | 11' |
| Engine Wheelbase | 21.44' | 22.25' | |
| Ratio of driving wheelbase to overall engine wheebase | 0.49 | 0.49 | |
| Overall Wheelbase (engine & tender) | 47.79' | 49.62' | 52.25' |
| Axle Loading (Maximum Weight per Axle) | |||
| Weight on Drivers | 51989 lbs | 79084 lbs | 110990 lbs |
| Engine Weight | 69985 lbs | 109156 lbs | 140990 lbs |
| Tender Light Weight | 61981 lbs | 82930 lbs | 93300 lbs |
| Total Engine and Tender Weight | 131966 lbs | 192086 lbs | 234290 lbs |
| Tender Water Capacity | 3200 gals | 4500 gals | 4500 gals |
| Tender Fuel Capacity (oil/coal) | 1564 gals | 2850 gals | 2546 gals |
| Minimum weight per yard of rail on which locomotive could run | 28.88 lb rail | 43.94 lb rail | 61.66 lb rail |
| Geometry Relating to Tractive Effort | |||
| Driver Diameter | 42" | 56" | 56" |
| Boiler Pressure | 140 psi | 145 psi | 180 psi |
| Cylinders (dia x stroke) | 16" x 20" | 17" x 24" | 20" x 24" |
| Tractive Effort | 14507 lbs | 15265 lbs | 26229 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.58 | 5.18 | 4.23 |
| Heating Ability | |||
| Firebox Area | 145 sq. ft | 196 sq. ft | |
| Grate Area | 21 sq. ft | 22 sq. ft | 39.70 sq. ft |
| Evaporative Heating Surface | 1334 | 1434 | 1964 |
| Superheating Surface | |||
| Combined Heating Surface | 1334 | 1434 | 1964 |
| Evaporative Heating Surface/Cylinder Volume | 286.62 | 227.44 | 225.06 |
| Computations Relating to Power Output (More Information) | |||
| Robert LeMassena's Power Computation | 2940 | 3190 | 7146 |
| Same as above plus superheater percentage | 2940 | 3190 | 7146 |
| Same as above but substitute firebox area for grate area | 0 | 21025 | 35280 |
| Power L1 | 0 | 4634.17 | 5667.61 |
| Power MT | 0 | 387.56 | 337.73 |
| This page last modified: . | [Contact] | All material © 1999-2008 SteamLocomotive.com |