Prussian P 6

Prussian P 6 DRG Class 37.0–1 PKP Oi1
Oi1-29 ex 37 171
Number(s)	DRG 37 001–163
Quantity	275
Manufacturer	Hohenzollern, Schwartzkopff
Year(s) of manufacture	1902–1910
Retired	about 1950
Wheel arrangement	2-6-0
Axle arrangement	1'C h2
Track gauge	1,435 mm (4 ft 8 ¹⁄₂ in) standard gauge
Length over buffers	17,608 mm (57 ft 9 ¹⁄₄ in)
Service weight	57.1 t (56.2 long tons; 62.9 short tons)
Adhesive weight	44.6 t (43.9 long tons; 49.2 short tons)
Axle load	15.2 t (15.0 long tons; 16.8 short tons)
Top speed	90 km/h (56 mph)
Indicated Power	755 kW (1,012 hp)
Driving wheel diameter	1,600 mm (62.99 in)
Leading wheel diameter	1,000 mm (39.37 in)
No. of cylinders	2
Cylinder bore	540 mm (21.26 in)
Piston stroke	630 mm (24.80 in)
Boiler Overpressure	12 bar (1,200 kPa; 170 psi)
Grate area	2.28 m² (24.5 sq ft)
Superheater area	41.91 m² (451.1 sq ft)
Evaporative heating area	134.93 m² (1,452.4 sq ft)
Tender	pr 2'2' T 16
Water capacity	16.0 m³ (3,500 imp gal; 4,200 US gal)

The Prussian Class P 6s were passenger locomotives operated by the Prussian state railways with a leading axle and three coupled axles.

The P 6 was conceived as a so-called universal locomotive. The first vehicle was manufactured in 1902 at Düsseldorf by the firm of Hohenzollern. This engine has a number of features that are characteristic of its designer, Robert Garbe: a narrow chimney located well forward and the unusual position of the boiler. As a result, and in spite of the relatively small, 1,600 mm (62.99 in) diameter, driving wheels (on the prototype they were only 1,500 mm or 59.06 in), the locomotives were authorised to travel at up to 90 km/h (56 mph), a speed which could not be attained in practice due to its poor riding qualities.

The smokebox superheater installed on the first machines was soon replaced by a smoke tube superheater. In all, 275 engines of this class were built up to 1910. 110 examples had to be handed over after the First World War as reparations. 163 locomotives were taken over by the Deutsche Reichsbahn as DRG Class 37.0-1, where they were allocated the running numbers 37 001–163. The locomotives with numbers 37 201–206 were, by contrast, G 6 and P 6 class engines respectively of Lübeck-Büchen Railway (LBE), that had a different design from the Prussian locomotives.

The Prussian P 6s were retired by about 1950. The few engines left after the Second World War were no longer employed by the Deutsche Bundesbahn and the Reichsbahn.

The locomotives taken over by the Polish State Railways (PKP) were given the designation Oi1. One of them has been preserved and can be viewed in the Warsaw Railway Museum. The engines were equipped with Prussian tenders of class pr 2'2' T 16.

Classes of Prussian locomotive and railcars
Express train locomotives	S 1 S 2 S 3 S 4 S 5.1 S 5.2 S 6 S 7 S 8 S 9 (Exp.) S 9 S 10 S 10.1 S 10.2 S 11
Passenger and express train locomotives	P 1 P 2 P 3 P 3.1 P 3.2 P 4 P 4.1 P 4.2 P 6 P 7 P 8 P 10
Goods train locomotives	G 1 G 2 G 3 G 4.1 G 4.2 G 4.3 G 5.1 G 5.2 G 5.3 G 5.4 G 5.5 G 7.1 G 7.2 G 7.3 G 8 G 8.1 G 8.2 G 8.3 G 9 (Mallet) G 9 G 10 G 12 (C.F.O.A) G 12 G 12.1
Tank locomotives	T 0 T 1 T 2 T 2/T 4 T 2.1 T 2/T 3/T 4 T 3 T 4 T 4.1 T 4.2 T 4.3 T 5.1 T 5.2 T 6 T 7 T 8 T 9 Elberfeld T 9 Langenschwalbach T 9.1 T 9.2 T 9.3 T 10 T 11 T 12 T 13 Hagans T 13.1 T 14 T 14.1 T 14 (Exp.) T 15 T 16 (Exp.) T 16 T 16.1 T 18 T 20 T 26 T 28
Narrow gauge locomotives	T 31 T 32 T 33 T 34 T 35 T 36 T 37 T 38 T 39 T 40
Electric locomotives	to follow
Railbuses	to follow
Prussian state railways

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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Prussian P 6

See also