New York Elevated classes B and C
United States 1879 45 produced
The first New York Elevated Forneys were 45 locomotives built in 1878 and 1879 by Baldwin and the Rhode Island Locomotive Works. There were two designs of different weight, which later became classes B and C. Like all Forneys, they had two coupled axles, the second of which had no flanges, and a trailing bogie that carried the full load of the supplies.
It started with the locomotives later known as class C, of which Baldwin supplied 13 and Rhode Island twelve. The locomotives delivered the following year became class B and were slightly lighter with a smaller water supply. Ten locomotives each were built by both manufacturers.
Technical data
General
| Property | B | C |
|---|---|---|
| Built | 1879 | 1878 |
| Manufacturers | Baldwin, Rhode Island | |
| Wheel arrangement | 0-4-4T (Forney) | |
| Gauge | 1,435 mm (Standard gauge) | |
Dimensions and weights
| Property | B | C |
|---|---|---|
| Service mass | 15.9 t | 17.5 t |
| Adhesion mass | 9.4 t | 11.2 t |
| Rigid wheelbase | 1.52 m | |
| Water capacity | 1,703 l | 1,798 l |
| Fuel capacity | 0.7 t (coal) | |
| Wheelbase | 4.60 m | |
Boiler
| Property | B | C |
|---|---|---|
| Grate area | 0.929 m² | |
| Firebox surface | 3.763 m² | 4.088 m² |
| Tube heating surface | 21.6 m² | 30.472 m² |
| Evaporative heating surface | 25.363 m² | 34.56 m² |
| Total heating surface | 25.4 m² | 34.6 m² |
Power plant
| Property | B | C |
|---|---|---|
| Driver diameter | 965 mm | |
| Boiler pressure | 10.3 bar | |
| Expansion type | simple expansion | |
| Cylinders | two, 254 x 356 mm | |
Power
| Property | B | C |
|---|---|---|
| Power source | steam | |
| Estimated power | 97 kW (132 PS) | 112 kW (152 PS) |
| Starting effort | 20.9 kN | |
Calculated values
| Property | B | C |
|---|---|---|
| Factor of adhesion | 1 : 4.41 | 1 : 5.28 |
| Optimal speed | 29 km/h | 32 km/h |
| Power-to-weight ratio | 6.1 kW/t | 6.4 kW/t |
| Heating Surface Equivalent | 44.2 m² | 55.0 m² |
| Cylinder volume/HSE | 1 : 815.72 | 1 : 655.22 |
| Adhesive weight/Total | 1 : 1.69 | 1 : 1.56 |
| Tractive force/Heating surface | 1 : 17.20 | 1 : 12.63 |
| Grate area/Heating surface | 1 : 27.30 | 1 : 37.20 |
| Firebox/Tube surface | 1 : 5.74 | 1 : 7.45 |