In 1960, the ATSF & PRR gained control of TP&W. In 1979, the ATSF reached agreement to acquire the former Pennsylvania Railroad's interest in TP&W. The TP&W was merged into ATSF in 1983.
In 1989 the ATSF sold the Lomax-Peoria-Logansport main line to new company, which used the TP&W name and became an independent railroad. When the ATSF and the BN merged in 1995 the new TP&W was granted operating rights over BN's line between Peoria and Galesburg, Illinois. Control of TP&W was acquired by Delaware Otsego Corporation in 1996 and it sold the TP&W to Rail America in 1999, and it is still operated today as the TP&W.
The Toledo, Peoria & Western bought only four "Mikado" type locomotives which were built by the American Locomotive Company in 1927. They were based on the USRA design but were among the lightest standard gauge "Mikdo" operated in North America. The TP&W gave them road numbers 40 through 43. These locomotives had 56" diameter drivers, 23.5" x 30" cylinders, a 200 psi boiler pressure, they exerted 41,140 pounds of tractive effort and each weighed 223,000 pounds. The firebox was 244 square feet which included 12 square feet of arch tubes and 54 square feet of thermic siphons. The evaporative heating surface was 2,235 square feet and with the superheater the combined heating surface was 3,063 square feet.
There are no surviving 2-8-2 "Mikado" type locomotives.
| Qty. | Road Numbers | Year Built | Builder | Notes |
|---|---|---|---|---|
| 4 | 40-43 | 1927 | ALCO | 1 |
In February 2006, Locobase put out a call for more information on this design on the Classic Trains forum and received diagrams from Ray Breyer, a Peoria-based modeller who had obtained several pages of TP&W diagrams. From the diagram and the accompanying roster, Locobase was able to draft this entry. Works numbers were 67331-67334 in June 1927.
These Mikes may have been based on the original USRA Light Mikado design (Locobase 40), but like most TP&W locomotives had relatively generous firebox heating surface and superheat areas.. Included in the direct heating surface were 12 sq ft (1.11 sq m) of arch tubes and 54 sq ft (5.02 sq m) of thermic syphons. Like their later Northern sisters, this quartet were among the lightest standard-gauge 2-8-2s to operate in North America.
As the TP & W dieselized in the late 1940s, all four engines were sold in a month. 41-42 went first on 28 December 1949 with 43 following on 23 January 1950 and 40 four days later on 27 January.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | H-6 |
| Locobase ID | 7446 |
| Railroad | Toledo, Peoria, & Western |
| Country | USA |
| Whyte | 2-8-2 |
| Number in Class | 4 |
| Road Numbers | 40-43 |
| Gauge | Std |
| Number Built | 4 |
| Builder | Alco-Richmond |
| Year | 1927 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 15 / 4.57 |
| Engine Wheelbase (ft / m) | 33 / 10.06 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.45 |
| Overall Wheelbase (engine & tender) (ft / m) | 64.89 / 19.78 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 40,875 / 18,541 |
| Weight on Drivers (lbs / kg) | 163,500 / 74,162 |
| Engine Weight (lbs / kg) | 223,000 / 101,151 |
| Tender Loaded Weight (lbs / kg) | 157,200 / 71,305 |
| Total Engine and Tender Weight (lbs / kg) | 380,200 / 172,456 |
| Tender Water Capacity (gals / ML) | 8500 / 32.20 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 12 / 11 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 68 / 34 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 56 / 1422 |
| Boiler Pressure (psi / kPa) | 200 / 1380 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 22" x 28" / 559x711 |
| Tractive Effort (lbs / kg) | 41,140 / 18660.81 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.97 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 188 - 2" / 51 |
| Flues (number - dia) (in / mm) | 36 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 19 / 5.79 |
| Firebox Area (sq ft / m2) | 244 / 16.54 |
| Grate Area (sq ft / m2) | 53.40 / 4.96 |
| Evaporative Heating Surface (sq ft / m2) | 3063 / 284.67 |
| Superheating Surface (sq ft / m2) | 828 / 76.95 |
| Combined Heating Surface (sq ft / m2) | 3891 / 361.62 |
| Evaporative Heating Surface/Cylinder Volume | 248.62 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 10,680 |
| Same as above plus superheater percentage | 12,923 |
| Same as above but substitute firebox area for grate area | 59,048 |
| Power L1 | 17,780 |
| Power MT | 958.98 |
