New York Elevated/Manhattan Railway 0-4-4 "Forney" Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class B (Locobase 6656)
Data from the 1902 Manhattan Railway Company locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange; and DeGolyer, Volume 8, p 210. According to Brennan's history -- [
], accessed 28 October 2005 -- Baldwin and Rhode Island Locomotive Works each produced ten engines. Baldwin's works numbers were 4350, 4353-4355, 4357, 4393, 4396-4397, 4401, 4407 in August 1878; road numbers were 36-40, 56-60. See
See Locobase 5040 for a more general discussion. The boiler pressure is an estimate as the diagrams do not give the figure.
Class C (Locobase 6657)
Data from the 1902 Manhattan Railway Company locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also DeGolyer, Volume 9, p. 33. Baldwin's (Burnham, Parry, Williams & Co, at that point) works numbers were 4465, 4468-4470 in October 1878; 4471-4472, 4477, 4479, 4481-4482, 4484-4485, 4488 in November (road numbers 66-78). Rhode Island supplied the others as works numbers 733-738 in December 1878 and 739-744 in January 1879 (road numbers 61-65, 79-90).
See Locobase 5423 for a more general discussion. The boiler pressure is an estimate as the diagrams do not give the figure.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | B | C |
| Locobase ID | 6656 | 6657 |
| Railroad | New York Elevated/Manhattan Railway | New York Elevated/Manhattan Railway |
| Country | USA | USA |
| Whyte | 0-4-4T | 0-4-4T |
| Number in Class | 20 | 25 |
| Road Numbers | 36-40, 56-60 | 66-90 |
| Gauge | Std | Std |
| Number Built | 20 | 25 |
| Builder | several | several |
| Year | 1879 | 1878 |
| Valve Gear | Stephenson | Stephenson |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 5 / 1.52 | 5 / 1.52 |
| Engine Wheelbase (ft / m) | 15.08 / 4.60 | |
| Ratio of driving wheelbase to overall engine wheelbase | 0.33 | |
| Overall Wheelbase (engine & tender) (ft / m) | 15.08 / 4.60 | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | 20,700 / 9389 | 24,800 / 11,249 |
| Engine Weight (lbs / kg) | 35,000 / 15,876 | 38,600 / 17,509 |
| Tender Loaded Weight (lbs / kg) | ||
| Total Engine and Tender Weight (lbs / kg) | 35,000 | 38,600 |
| Tender Water Capacity (gals / ML) | 450 / 1.80 | 475 / 1.80 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 0.80 / 1 | 0.80 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 17 / 8.50 | 21 / 10.50 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 38 / 965 | 38 / 965 |
| Boiler Pressure (psi / kPa) | 150 / 1030 | 150 / 1030 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 10" x 14" / 254x356 | 10" x 14" / 254x356 |
| Tractive Effort (lbs / kg) | 4697 / 2130.53 | 4697 / 2130.53 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.41 | 5.28 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 100 - 1.5" / 38 | 128 - 1.5" / 38 |
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 6.50 / 1.98 | 6.58 / 2.01 |
| Firebox Area (sq ft / m2) | 40.50 / 3.76 | 44 / 4.09 |
| Grate Area (sq ft / m2) | 10 / 0.93 | 10 / 0.93 |
| Evaporative Heating Surface (sq ft / m2) | 273 / 25.37 | 372 / 34.56 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 273 / 25.37 | 372 / 34.56 |
| Evaporative Heating Surface/Cylinder Volume | 214.96 | 292.91 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 1500 | 1500 |
| Same as above plus superheater percentage | 1500 | 1500 |
| Same as above but substitute firebox area for grate area | 6075 | 6600 |
| Power L1 | 3557 | 4428 |
| Power MT | 757.67 | 787.26 |