FS Class 310

Type and origin
Power type	Steam
Builder	Ernesto Breda (49), MÁVAG (20)
Build date	1894–1901
Total produced	69

Specifications
Configuration:
• UIC	C n2v
Gauge	1,435 mm (4 ft 8 ¹⁄₂ in) standard gauge
Driver dia.	1,500 mm (59.06 in)
Length	8,723 mm (28 ft 7 ³⁄₈ in)
Axle load	14.5 tonnes (14.3 long tons; 16.0 short tons)
Loco weight	43.5 tonnes (42.8 long tons; 48.0 short tons)
Tender weight	33 tonnes (32 long tons; 36 short tons)
Fuel type	Coal
Fuel capacity	4,000 kg (8,800 lb)
Water cap	12,000 litres (2,600 imp gal; 3,200 US gal)
Firebox: • Firegrate area	1.8 m² (19 sq ft)
Boiler pressure	12 kg/cm² (1.18 MPa; 171 psi)
Heating surface	143.2 m² (1,541 sq ft)
Cylinders	Two, compound
High-pressure cylinder	460 mm × 640 mm (18.11 in × 25.20 in)
Low-pressure cylinder	650 mm × 640 mm (25.59 in × 25.20 in)
Valve gear	Walschaerts

Performance figures
Maximum speed	60 km/h (37 mph)
Power output	500 CV (368 kW; 493 hp) at 30 km/h (19 mph)
Tractive effort	6,620 kgf (64.9 kN; 14,600 lbf)

The Ferrovie dello Stato Italiane (FS; Italian State Railways) Class 310 (Italian: Gruppo 310), formerly Rete Mediterranea Class 380, was a 0-6-0 steam locomotive; they were the first Italian as-built compound locomotives.

Design and construction

After modifying six of the pre-existing Class 255 to a compound arrangement as an experiment, with positive results, the Ufficio d'Arte di Torino of the Rete Mediterranea designed a two-cylinder compound locomotive meant for mixed service; this design also saw the beginning of the adoption of the Walschaerts valve gear on Italian locomotives.

The round-topped boiler on the first 49 units had standard tubes; however, on the last 20 units it was replaced by one with Serve tubes, which brought the power of these locomotives from the original 430 CV (316 kW; 424 hp) to 500 CV (368 kW; 493 hp).

These locomotives were built between 1894 and 1901 by Ernesto Breda and MÁVAG.^[1]^[2]

Service

The Class 310, while an important step in Italian locomotive design, was not a thoroughly successful design; the unique cut-off command for both cylinders made it difficult to equalize the work being done, the starting valve design did not prove entirely successful, and the proportions of the cylinders were also less than optimal. The need to obviate these inconvenients led to the development of the more successful Class 320.

The Class 310 locomotives served on both passenger and freight trains on secondary lines for their whole career; the last units survived till the early 1930s around Asti, but were withdrawn soon after. No locomotive survived into preservation.^[3]^[2]

References

↑ Cornolò 2014, pp. 170-171.
1 2 Kalla-Bishop 1986, p. 26.
↑ Cornolò 2014, pp. 171-172.

Cornolò, Giovanni (May 2014). "Locomotive a vapore". TuttoTreno (2).
Kalla-Bishop, P.M. (1986). Italian state railways steam locomotives : together with low-voltage direct current and three-phase motive power. Abingdon: Tourret. ISBN 0905878035.

Classes of Ferrovie dello Stato locomotives

Steam

Tender locomotives	100 102 103 110^I 110^II 111 112 113 114 116 117 118 119^I 119^II 120 121 122 136 139 140 150 155 158 160 161 162 163 164 170 180 181^I 181^II 182^I 182^II 183 185 186 187 190 193 194 195 196 197 198 200 201 206 207 208 209 211 212 215 216 217 218 219 220 221 222 223 224 255 260 261 262 265 268 269 270 271 272 290 291 292 293 310 320 380 385 388 390 391 394 395 396 397 400 410 420 421 422 423 424 425 450 451 452 453 454 455 460 470 471 472 473 474 475 476 477 478 479 480 482 499^I 499^II 500 510 512 513 530 540^I 540^II 542 543 545 550 552 553 554 555 556 560 600 601 603 604 605 606 607 623 625 626 630 640^I 640^II 645 650 652 653 656 660 666 670 671 672 675 676 677 680 681 682 683^I 683^II 685 686 687 688 690^I 690^II 691 720 728 729 730 731 735 736 737 740 741^I 741^II 743^I 743^II 744 745 746 747^I 747^II 750
Tank locomotives	800^I 800^II 801 802^I 802^II 803^I 803^II 804 805 806 809 810^I 810^II 811 812 813 814 815^I 815^II 815^III 816 817 818 819 820^I 820^II 821^I 821^II 822 823 824 825 826^I 826^II 827 828^I 828^II 828^III 829 830^I 830^II 831 835 842 848 849 850^I 850^II 851 870 871 874^I 874^II 875 876 877 880^I 880^II 881 882 885 893 894 895 896^I 896^II 897 898 899^I 899^II 900 902 904 905 906 910 912 915 940 950 980 981 999
Narrow gauge locomotives	R.201 R.202 R.300 R.301 R.302 R.305 R.306 R.310 R.370 R.401 R.402 R.410 R.440 R.441 R.442 R.443 R.600 P U

Electric

Rechargeable battery	E.421
650 V DC Third rail	E.220 E.320 E.321 E.420 E.620
3,6 kV AC Three-Phase	E.330 E.331 E.332 E.333 E.360 E.380 E.390 E.430 E.431 E.432 E.550 E.551 E.552 E.554
10,6 kV AC Three-Phase	E.470 E.471 E.472 E.570
3 kV DC	E.321 E.322 E.323 E.324 E.326 E.400 E.402A E.402B E.403 E.404 E.405 E.412 E.414 E.424 E.428 E.434 E.444 E.444R E.447 E.453 E.454 E.464 E.621 E.625 E.626 E.632 E.633 E.636 E.645 E.646 E.652 E.655 E.656
25 kV AC	E.491 E.492

Diesel

Light shunters	206 207 208^I 208^II 209 210 211 R.212 213^I 213^II 214 215 216 218^I
Shunters	218^II 225 234 235 236 245 250 255
Heavy shunters	Ne 120 D.141 RD.142 D.143 D.145 D.146 D.147 356 372 Ne 700
Train locomotives	D.341 D.342 D.343 D.345 D.442 D.443 D.445 D.449 D.461

see also Category:Rolling stock of Italy

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