The Est 0.250 to 0.500 and 0.701 to 0.766 were 0-6-0 locomotives for freight traffic of the Chemins de fer de l'Est.[1]
They were first put in service in 1859[2][3] and retired from service from 1892 until 1937.[4]
Already in 1859 the design had been adopted by the Chemins de fer de l'Est, which had the type built from 1859 to 1884 without significant changes by their own workshops as well as various other manufacturers as series Est 0.250-0299 and 0.350-0.478.[5]
In 1881-1882 the locomotives Est 0.479-0.500 as well as 0.701-0.708, and in 1883-1884 the 0.709-0.766 were put into service.[6]
Due to their longer fireboxes these later machines had an increased power output. The firegrate area had been increased from 1.35 m2 (14.5 sq ft) to 1.63 m2 (17.5 sq ft).
The new boiler had a boiler pressure of 9 kg/cm2 (0.883 MPa; 128 psi) and the machine's adhesive weight increased to 36.6 t (80,700 lb), while tractive effort was 5,329 kg (11,700 lb).
From 1904 to 1909 forty-eight of the machines from series 0.252-0.428 were rebuilt as 2-6-0 two-cylinder compound locomotives.[8][9]
These 48 machines were renumbered as Est 30.252 to 30.428 [fr], retaining their original numbers with an additional prefix of '3' as follows:[8]
30.252
30.279
30.281
30.282
30.290
30.292
30.293
30.294
30.295
30.298
30.304
30.311
30.313
30.315
30.317
30.318
30.320
30.321
30.323
30.324
30.325
30.326
30.343
30.349
30.352
30.353
30.354
30.362
30.366
30.368
30.373
30.375
30.377
30.390
30.392
30.395
30.396
30.397
30.399
30.403
30.407
30.411
30.412
30.413
30.415
30.418
30.425
30.428
From 1906 to 1926 ninety-two of the machines from series 0.254-0.489 and 0.701-0.766 were rebuilt as 2-6-0 locomotives with simple expansion.[10][9] The 92 machines were renumbered as Est 30.254 to 30.766 [fr], retaining their original numbers with an additional prefix of '3' as follows:[10]
30.254
30.255
30.256
30.260
30.264
30.265
30.266
30.268
30.269
30.272
30.275
30.289
30.297
30.302
30.303
30.305
30.306
30.307
30.310
30.327
30.329
30.333
30.335
30.337
30.338
30.339
30.345
30.346
30.347
30.348
30.356
30.381
30.385
30.391
30.393
30.400
30.410
30.414
30.416
30.417
30.429
30.431
30.432
30.433
30.434
30.435
30.437
30.438
30.439
30.441
30.442
30.443
30.444
30.445
30.446
30.447
30.450
30.451
30.452
30.453
30.456
30.457
30.458
30.461
30.462
30.463
30.464
30.465
30.467
30.468
30.469
30.471
30.472
30.474
30.475
30.476
30.477
30.478
30.480
30.489
30.701
30.702
30.704
30.709
30.710
30.723
30.732
30.733
30.742
30.745
30.763
30.766
Locomotive names
The locomotives of the earlier series received names. They were named as follows:[11]
Vilain, Lucien-Maurice (1980). L'Évolution des locomotives à vapeur de la compagnie des chemins de fer de l'Est 1853-1938 (in French). éditions Pygmalion. ISBN2-85704-081-4.