New York Central class H-5
United States 1912 661 produced
Most of the New York Central class H-5 Mikados came from the rebuilds of a total of 482 G-5 class Consolidations. Not only were locomotives rebuilt directly by the New York Central, but also by its subsidiaries Boston & Albany and Big Four. The firebox remained largely unchanged and the boiler barrel was lengthened. While the cylinders were enlarged, the boiler pressure was reduced by 20 psi. The combination of these measures allowed to increase speed. Overall, the adhesive weight also increased. After the G-5 had already been built in different versions, there were also many differences within the H-5 class. In addition to the rebuilt locomotives, 179 were newly built.
Technical data
General
| Property | H-5a to h, k, m, n | H-5l | H-5p, q, t | H-5r |
|---|---|---|---|---|
| Built | 1912-1914 | 1913-1915 | 1915-1916, 1925 | 1916 |
| Manufacturers | ALCO | ALCO, Lima | ALCO | |
| Wheel arrangement | 2-8-2 (Mikado) | |||
| Gauge | 1,435 mm (Standard gauge) | |||
Dimensions and weights
| Property | H-5a to h, k, m, n | H-5l | H-5p, q, t | H-5r |
|---|---|---|---|---|
| Wheelbase | 10.74 m | 10.57 m | 10.74 m | |
| Total wheelbase | 20.42 m | 19.74 m | 20.52 m | 20.60 m |
| Service mass | 127 t | 127.5 t | 131.2 t | 131.4 t |
| Adhesion mass | 97.7 t | 96.8 t | 98 t | 97.9 t |
| Rigid wheelbase | 5.03 m | |||
| Axle load | 24.4 t | 24.2 t | 24.5 t | |
| Water capacity | 28,391 l | 30,283 l | ||
| Fuel capacity | 10.9 t (coal) | |||
| Total mass | 195.8 t | 199.5 t | 203.5 t | |
Boiler
| Property | H-5a to h, k, m, n | H-5l | H-5p, q, t | H-5r |
|---|---|---|---|---|
| Grate area | 5.249 m² | |||
| Firebox surface | 21.368 m² | 21.451 m² | ||
| Tube heating surface | 353.125 m² | 358.978 m² | 351.174 m² | 359.08 m² |
| Evaporative heating surface | 374.493 m² | 380.345 m² | 372.542 m² | 380.531 m² |
| Superheater surface | 80.826 m² | 81.755 m² | ||
| Total heating surface | 455.3 m² | 461.2 m² | 453.4 m² | 462.3 m² |
Power plant
| Property | H-5a to h, k, m, n | H-5l | H-5p, q, t | H-5r |
|---|---|---|---|---|
| Driver diameter | 1,600 mm | |||
| Boiler pressure | 13.1 bar | 12.4 bar | 13.1 bar | 13.8 bar |
| Cylinders | two, 635 x 813 mm | |||
Power
| Property | H-5a to h, k, m, n | H-5l | H-5p, q, t | H-5r |
|---|---|---|---|---|
| Estimated power | 1,939 kW (2,636 PS) | 1,902 kW (2,586 PS) | 1,939 kW (2,636 PS) | 1,976 kW (2,687 PS) |
Calculated values
| Property | H-5a to h, k, m, n | H-5l | H-5p, q, t | H-5r |
|---|---|---|---|---|
| Optimal speed | 51 km/h | 53 km/h | 51 km/h | 50 km/h |
| Power-to-weight ratio | 15.3 kW/t | 14.9 kW/t | 14.8 kW/t | 15.0 kW/t |
| Heating Surface Equivalent | 643.0 m² | 648.8 m² | 641.0 m² | 651.3 m² |
| Cylinder volume/HSE | 1 : 800.66 | 1 : 793.44 | 1 : 803.10 | 1 : 790.45 |
| Adhesive weight/Total | 1 : 1.30 | 1 : 1.32 | 1 : 1.34 | |
| Grate area/Heating surface | 1 : 86.74 | 1 : 87.86 | 1 : 86.37 | 1 : 88.07 |
| Firebox/Tube surface | 1 : 16.53 | 1 : 16.80 | 1 : 16.43 | 1 : 16.74 |
| Total/Superheater | 1 : 4.63 | 1 : 4.71 | 1 : 4.61 | 1 : 4.65 |
