French Northern Railway No. 3.801 to 3.865
French State Railway 2-232 TA
The Nord series 3.801 to 3.965 was a 4-6-4T tank locomotive for suburban service around Paris designed by Gaston Du Bousquet. It was a more powerful replacement for the 4-4-4T series 2.231. Although Du Bousquet was a friend of four-cylinder compound engines, it was a two-cylinder simple. In 1909, 1910 and 1911 SFCM built one batch each, followed by five more locomotives delivered from the Nord's Hellemmes shops in 1914. Six more went to Franco-Belge.
From No. 3.836, the locomotives were built with feedwater heaters and superheaters. The earlier ones later got a higher boiler pressure to compensate for the lower power. Between 1926 and 1932, 29 locomotives were equipped with pneumatic steam reversers to allow for push-pull working. With the founding of the SNCF, they became 2-232 TA. Some were destroyed in World War II and the last one was withdrawn in 1957.
Technical data
General
| Property | 3.801-3.835 | 3.836-3.865 |
|---|---|---|
| Built | 1909-1911, 1914 | |
| Manufacturers | SFCM, Hellemmes | |
| Wheel arrangement | 4-6-4T (Hudson) | |
| Gauge | 1,435 mm (Standard gauge) | |
Dimensions and weights
| Property | 3.801-3.835 | 3.836-3.865 |
|---|---|---|
| Length | 13.54 m | |
| Wheelbase | 11.00 m | |
| Service mass | 87.1 t | 86.6 t |
| Adhesion mass | 49 t | 48.3 t |
| Rigid wheelbase | 3.80 m | |
| Axle load | 16.3 t | 16.1 t |
| Water capacity | 9,000 l | |
| Fuel capacity | 3 t (coal) | |
Boiler
| Property | 3.801-3.835 | 3.836-3.865 |
|---|---|---|
| Grate area | 2.2 m² | |
| Firebox surface | 9.95 m² | |
| Tube heating surface | 165.52 m² | 152.08 m² |
| Evaporative heating surface | 175.47 m² | 162.03 m² |
| Total heating surface | 175.5 m² | 192.7 m² |
| Superheater surface | 30.66 m² | |
Power plant
| Property | 3.801-3.835 | 3.836-3.865 |
|---|---|---|
| Driver diameter | 1,664 mm | |
| Boiler pressure | 12 bar | |
| Expansion type | simple expansion | |
| Cylinders | two, 480 x 600 mm | two, 560 x 600 mm |
Power
| Property | 3.801-3.835 | 3.836-3.865 |
|---|---|---|
| Power source | steam | |
| Estimated power | 600 kW (816 PS) | 700 kW (952 PS) |
| Top speed | 105 km/h | |
| Starting effort | 84.7 kN | 115.3 kN |
Calculated values
| Property | 3.801-3.835 | 3.836-3.865 |
|---|---|---|
| Factor of adhesion | 1 : 5.67 | 1 : 4.11 |
| Optimal speed | 43 km/h | 37 km/h |
| Power-to-weight ratio | 6.9 kW/t | 8.1 kW/t |
| Heating Surface Equivalent | 225.2 m² | 273.1 m² |
| Cylinder volume/HSE | 1 : 964.15 | 1 : 1,082.24 |
| Adhesive weight/Total | 1 : 1.78 | 1 : 1.79 |
| Tractive force/Heating surface | 1 : 10.09 | 1 : 12.50 |
| Grate area/Heating surface | 1 : 79.76 | 1 : 87.59 |
| Firebox/Tube surface | 1 : 16.64 | 1 : 15.28 |
| Total/Superheater | 1 : 5.28 |
