French Northern Railway Crampton
No. 122 to 161, 165 to 170 and 1 to 12
The Cramptons of the Nord comprised a total of 58 locomotives, which, like almost all French Cramptons, were built by Cail. They had outside cylinders which were raised and inclined. The bearings were generously sized to reduce wear at high speeds. The wheels on the first leading axle were visibly larger than those on the second and also had to carry significantly more weight.
As a rule, they hauled twelve coaches and sometimes up to 16, each of which only weighed eight tonnes. Four batches were delivered between 1849 and 1859, most of which had a driving wheel diameter of 2,100 mm (6 ft 10 11/16 in). Only numbers 134 to 145 from 1853 had wheels of 2,300 mm (7 ft 6 9/16 in) and a higher boiler pressure to compensate. Numbers 165 to 170 from the last batch were the first locomotives in France to have Walschaerts valve gear.
Technical data
General
| Property | 1849 variant | 1853 variant | 1859 variant |
|---|---|---|---|
| Built | 1849-1859 | ||
| Manufacturers | Cail | ||
| Wheel arrangement | 4-2-0 (Crampton) | ||
| Gauge | 1,435 mm (Standard gauge) | ||
Dimensions and weights
| Property | 1849 variant | 1853 variant | 1859 variant |
|---|---|---|---|
| Wheelbase | 4.89 m | 4.50 m | 4.76 m |
| Service mass | 28.9 t | 29.6 t | 29.1 t |
| Adhesion mass | 10.6 t | 12.6 t | |
| Total mass | 47.6 t | ||
| Rigid wheelbase | 4.89 m | 4.50 m | 4.76 m |
| Axle load | 10.6 t | 12.6 t | |
| Water capacity | 7,100 l | ||
| Fuel capacity | 2 t (coal) | ||
| Empty mass | 25.9 t | ||
Boiler
| Property | 1849 variant | 1853 variant | 1859 variant |
|---|---|---|---|
| Grate area | 1.45 m² | 1.27 m² | 1.305 m² |
| Firebox surface | 7 m² | 66 m² | 6.15 m² |
| Tube heating surface | 91.42 m² | 31.71 m² | 86.83 m² |
| Evaporative heating surface | 98.42 m² | 97.71 m² | 92.98 m² |
| Total heating surface | 98.4 m² | 97.7 m² | 93.0 m² |
Power plant
| Property | 1849 variant | 1853 variant | 1859 variant |
|---|---|---|---|
| Driver diameter | 2,100 mm | 2,300 mm | 2,100 mm |
| Boiler pressure | 7 bar | 7.8 bar | 7.5 bar |
| Expansion type | simple expansion | ||
| Cylinders | two, 420 x 560 mm | two, 420 x 550 mm | |
Power
| Property | 1849 variant | 1853 variant | 1859 variant |
|---|---|---|---|
| Power source | steam | ||
| Estimated power | 190 kW (258 PS) | 200 kW (272 PS) | |
| Top speed | 120 km/h | ||
| Starting effort | 28.0 kN | 28.5 kN | 29.5 kN |
Calculated values
| Property | 1849 variant | 1853 variant | 1859 variant |
|---|---|---|---|
| Factor of adhesion | 1 : 3.72 | 1 : 4.34 | 1 : 4.20 |
| Optimal speed | 42 km/h | 40 km/h | 42 km/h |
| Power-to-weight ratio | 6.6 kW/t | 6.4 kW/t | 6.9 kW/t |
| Heating Surface Equivalent | 133.4 m² | 427.7 m² | 123.7 m² |
| Cylinder volume/HSE | 1 : 1,163.02 | 1 : 362.79 | 1 : 1,231.70 |
| Adhesive weight/Total | 1 : 2.73 | 1 : 2.35 | 1 : 2.31 |
| Tractive force/Heating surface | 1 : 5.94 | 1 : 6.09 | 1 : 6.62 |
| Grate area/Heating surface | 1 : 67.88 | 1 : 76.94 | 1 : 71.25 |
| Firebox/Tube surface | 1 : 13.06 | 1 : 0.48 | 1 : 14.12 |
