Nickel Plate Road classes S to S-3
United States 1934 80 produced
The C&O T-1 class with the 2-10-4 wheel arrangement was developed from the Erie 2-8-4. Lima reduced this again by one driving axle and thus created the class S of the NKP. In the years between 1934 and 1949, a total of 80 class S, S-1, S-2 and S-3 locomotives were built, which shone with exceptional performance and pulled fast freight trains. They produced around 4,500 hp and were designed for speeds of 70 mph. They were scrapped between 1957 and 1964. Today there are still six preserved. The best known is the 765, which runs fully booked special trips on a regular basis. The 779, which still exists today, was Lima's last steam locomotive built in 1949.
Technical data
General
| Property | S, S-1 | S-2 | S-3 |
|---|---|---|---|
| Built | 1934, 1942-1943 | 1944 | 1949 |
| Manufacturers | ALCO, Lima | ||
| Wheel arrangement | 2-8-4 (Berkshire) | ||
| Gauge | 1,435 mm (Standard gauge) | ||
Dimensions and weights
| Property | S, S-1 | S-2 | S-3 |
|---|---|---|---|
| Length | 30.70 m | ||
| Wheelbase | 12.80 m | ||
| Total wheelbase | 26.73 m | ||
| Service mass | 194.4 t | 199.9 t | 201.5 t |
| Adhesion mass | 113.9 t | 115.3 t | 120.7 t |
| Total mass | 355.8 t | 364 t | 366.9 t |
| Rigid wheelbase | 5.56 m | ||
| Axle load | 28.5 t | 28.8 t | 30.2 t |
| Water capacity | 83,279 l | ||
| Fuel capacity | 20 t (coal) | ||
Boiler
| Property | S, S-1 | S-2 | S-3 |
|---|---|---|---|
| Grate area | 8.389 m² | ||
| Firebox surface | 42.735 m² | ||
| Tube heating surface | 400.784 m² | ||
| Evaporative heating surface | 443.52 m² | ||
| Superheater surface | 185.156 m² | 185.063 m² | 185.156 m² |
| Total heating surface | 628.7 m² | 628.6 m² | 628.7 m² |
Power plant
| Property | S, S-1 | S-2 | S-3 |
|---|---|---|---|
| Driver diameter | 1,753 mm | ||
| Boiler pressure | 16.9 bar | ||
| Expansion type | simple expansion | ||
| Cylinders | two, 635 x 864 mm | ||
Power
| Property | S, S-1 | S-2 | S-3 |
|---|---|---|---|
| Power source | steam | ||
| Indicated power | 3,356 kW (4,563 PS) | ||
| Top speed | 113 km/h | ||
| Starting effort | 285.3 kN | ||
Calculated values
| Property | S, S-1 | S-2 | S-3 |
|---|---|---|---|
| Factor of adhesion | 1 : 3.92 | 1 : 3.97 | 1 : 4.15 |
| Optimal speed | 72 km/h | ||
| Power-to-weight ratio | 17.3 kW/t | 16.8 kW/t | 16.7 kW/t |
| Heating Surface Equivalent | 1,027.5 m² | 1,027.3 m² | 1,027.5 m² |
| Cylinder volume/HSE | 1 : 532.35 | 1 : 532.44 | 1 : 532.35 |
| Adhesive weight/Total | 1 : 1.71 | 1 : 1.73 | 1 : 1.67 |
| Tractive force/Heating surface | 1 : 9.48 | ||
| Grate area/Heating surface | 1 : 74.94 | 1 : 74.93 | 1 : 74.94 |
| Firebox/Tube surface | 1 : 9.38 | ||
| Total/Superheater | 1 : 2.40 | ||
