French Western Railway No. 2701 to 2820 and French State Railway (État) No. 501 to 620
French State Railway 230 C 501 to 620
Since the No. 2501 to 2540 ten-wheelers had drivers too small for express service, the French Ouest took these as basis for a new type of express locomotives built from 1901. They got larger drivers with a diameter of 1.910 instead of 1.750 mm and were otherwise very similar. Like their basis, they were four-cylinder de Glehn compounds. Of the first 20 locomotives, the first ten were right hand drive and the rest left hand drive.
The next 50 locomotives still had a boiler with a Belpaire firebox and serve tubes, but now had piston instead of slide valves. The last 50 were only built by the German companies Borsig and Henschel and had a superheater. The SNCF designated them 230 C. After the Ouest was taken over by the État, they ordered 85 identical locomotives in 1912 and numbered them 621 to 705.
Technical data
General
| Property | 2701-2720 | 2721-2770 | 2771-2820 |
|---|---|---|---|
| Built | 1901-1908 | ||
| Manufacturers | Sotteville, Fives-Lille, SFCM, Borsig, Henschel, Batignolles-Châtillon | ||
| Wheel arrangement | 4-6-0 (Ten-wheeler) | ||
| Gauge | 1,435 mm (Standard gauge) | ||
Dimensions and weights
| Property | 2701-2720 | 2721-2770 | 2771-2820 |
|---|---|---|---|
| Length loco | 10.83 m | ||
| Wheelbase | 8.22 m | ||
| Service mass | 63.5 t | 65 t | 69.7 t |
| Adhesion mass | 45 t | 46 t | 50 t |
| Total mass | 101.5 t | 103 t | 107.7 t |
| Rigid wheelbase | 4.30 m | ||
| Axle load | 15 t | 15.4 t | 16.7 t |
| Water capacity | 18,000 l | ||
| Fuel capacity | 5 t (coal) | ||
| Empty mass | 59 t | ||
Boiler
| Property | 2701-2720 | 2721-2770 | 2771-2820 |
|---|---|---|---|
| Grate area | 2.45 m² | 2.8 m² | |
| Firebox surface | 12.17 m² | 13.57 m² | |
| Tube heating surface | 188.83 m² | 121.65 m² | |
| Evaporative heating surface | 201 m² | 135.22 m² | |
| Total heating surface | 201.0 m² | 173.4 m² | |
| Superheater surface | 38.2 m² | ||
Power plant
| Property | 2701-2720 | 2721-2770 | 2771-2820 |
|---|---|---|---|
| Driver diameter | 1,910 mm | 1,940 mm | |
| Boiler pressure | 15 bar | ||
| Expansion type | compound | ||
| Cylinders | four, HP: 350 x 640 mm and LP: 550 x 640 mm | four, HP: 380 x 640 mm and LP: 550 x 640 mm | |
Power
| Property | 2701-2720 | 2721-2770 | 2771-2820 |
|---|---|---|---|
| Power source | steam | ||
| Estimated power | 800 kW (1,088 PS) | 950 kW (1,292 PS) | |
| Top speed | 110 km/h | ||
| Starting effort | 74.5 kN | 73.3 kN | 82.2 kN |
| Starting effort simple | 89.4 kN | 88.0 kN | 98.7 kN |
Calculated values
| Property | 2701-2720 | 2721-2770 | 2771-2820 |
|---|---|---|---|
| Factor of adhesion | 1 : 5.93 | 1 : 6.15 | 1 : 5.97 |
| Optimal speed | 66 km/h | 71 km/h | |
| Power-to-weight ratio | 12.6 kW/t | 12.3 kW/t | 13.6 kW/t |
| Heating Surface Equivalent | 261.9 m² | 279.5 m² | |
| Cylinder volume/HSE | 1 : 1,051.00 | 1 : 1,063.51 | |
| Adhesive weight/Total | 1 : 1.41 | 1 : 1.39 | |
| Tractive force/Heating surface | 1 : 7.74 | 1 : 7.62 | 1 : 9.90 |
| Grate area/Heating surface | 1 : 82.04 | 1 : 61.94 | |
| Firebox/Tube surface | 1 : 15.52 | 1 : 8.96 | |
| Total/Superheater | 1 : 3.54 | ||
