Rochester & Lake Ontario 0-4-4 "Forney" Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class 31 (Locobase 11152)
Data from Schenectady Locomotive Works, Illustrated Catalogue of Simple and Compound Locomotives (Philadelphia: J B Lippincott, 1897), pp. 196-197. Thanks to Kevin Bunker for his 29 May 2023 email supplying information and a link to a photograph showing the actual lines of the 31.) Works number was 1936 in September 1884.
Known as the Bay Railroad, this line connected the city with the beach at Lake Ontario. This was a typical short-haul Forney tank. Kevin Bunker's photographed, forwarded from [
], shows a typical steam dummy layout, but also some features of an inspection engine.
Schenectady's accompanying notes stated: "This design of locomotive is usually built with exhaust, safety valves, and cylinder cocks muffled and for street railway service can be made to pass cu rves of 75 ft radius."
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 31 |
| Locobase ID | 11152 |
| Railroad | Rochester & Lake Ontario |
| Country | USA |
| Whyte | 0-4-4T |
| Number in Class | 1 |
| Road Numbers | 31 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Schenectady |
| Year | 1884 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 5 / 1.52 |
| Engine Wheelbase (ft / m) | 14.75 / 4.50 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.34 |
| Overall Wheelbase (engine & tender) (ft / m) | 14.75 / 4.50 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 38,000 / 17,237 |
| Engine Weight (lbs / kg) | 52,000 / 23,587 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 52,000 |
| Tender Water Capacity (gals / ML) | 700 / 2.65 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 32 / 16 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 43 / 1092 |
| Boiler Pressure (psi / kPa) | 140 / 970 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 18" / 356x457 |
| Tractive Effort (lbs / kg) | 9764 / 4428.88 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.89 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 165 - 1.5" / 38 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 7.58 / 2.31 |
| Firebox Area (sq ft / m2) | 60.70 / 5.64 |
| Grate Area (sq ft / m2) | 13.70 / 1.27 |
| Evaporative Heating Surface (sq ft / m2) | 545 / 50.65 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 545 / 50.65 |
| Evaporative Heating Surface/Cylinder Volume | 169.78 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1918 |
| Same as above plus superheater percentage | 1918 |
| Same as above but substitute firebox area for grate area | 8498 |
| Power L1 | 2652 |
| Power MT | 307.72 |