PKP class Ok1

4 ft 8+1⁄2 in) standard gaugeLeading dia.1,000 mm (39.37 in)Driver dia.1,750 mm (68.90 in)Length18,585 mm (60 ft 11+3⁄4 in)Height4.550 m (14 ft 11 in)Axle load16.6–17.3 tonnes (16.3–17.0 long tons; 18.3–19.1 short tons)Adhesive weight50.6 tonnes (49.8 long tons; 55.8 short tons)Loco weight78.2 tonnes (77.0 long tons; 86.2 short tons)Fuel capacity7.0 tonnes (6.9 long tons; 7.7 short tons)Firebox:​ • Grate area14.28 m² (153.7 sq ft)Boiler pressure1.2 MPa (170 lbf/in²)Heating surface:​ • Firebox2.64 m² (28.4 sq ft)Cylinder size575 mm × 630 mm (22.64 in × 24.80 in)

Career
Operators	PKP
Class	Ok1

Ok1 is the Polish designation of a Prussian steam locomotive, the Prussian P 8, used on Polish State Railways. Production of the P 8 lasted from 1908 until 1928 and this locomotive was used on practically all European railway lines.

After the end of World War I, 192 Class P 8 engines were handed over as a reparation to Poland, including two machines for Free City of Danzig, where they were re-designated as Class Ok1 locomotives (numbers: Ok1-1 to Ok1-190 and Ok1-1Dz and 2Dz for Danzig machines).^[1] Since the class was considered successful, further 65 locomotives were built in Germany at Polish order in 1922-1923 (designated Ok1-201 to 265).^[1]

During World War II all the locomotives were captured by the Germans or Soviets and most were pressed into the German Railways. After the war, along with new war reparations, Poland received 429 locomotives P 8 (numbers Ok1-1 to 429), what made it by far the most numerous passenger locomotive in the country.^[1] They were used until the late 1970s - last locomotive was withdrawn from line service in 1981.^[1] A few engines were preserved, including Ok1-359 (see the photograph), which is stabled at the Wolsztyn museum.

See also

• PKP classification system

References

• Terczyński, Paweł (2003). Atlas parowozów [Steam locomotives' atlas] (in Polish). Poznań. p. 56. ISBN 83-901902-8-1.{{cite book}}: CS1 maint: location missing publisher (link)

External links

Diesel

Standard gauge	SM01 SM02 SM03 SM04 SM15 SM25 SM30 SP30 SM31 SP32 SM40 ST40 SM41 SM42 SP42 SU42 ST43 ST44 SP45 ST45 SU45 SU46 SP47 SM48 ST48 SU160
Narrow gauge	Ld1 Lyd1 Lyd2 Lxd2

ElectricSteam

Standard gauge*	Ok22 OKl27 OKz32 Ol49 Os24 Pm36 Pt31 Pt47 Pu29 TKh49 TKt48 Tr21 Ty23 Ty37 Ty42 Ty43 Ty45 Ty51 Ty246
Standard gauge**	Od2 Oi1 Oi2 Ok1 OKi1 OKi2 OKl2 OKl12 OKo1 Ol12 Ot1 Pd1 Pd4 Pd5 Pf1 Pf12 Pk1 Pk2 Pm2 Pm3 Pn12 Pt1 Th1 Th3 Th24 Ti1 Ti2 Ti4 Ti11 Ti12 Ti16 Ti17 TKh1 TKh2 TKi1 TKi3 TKp1 TKp11 TKp101 TKt1 TKt2 TKt3 TKw1 TKw2 Tp1 Tp2 Tp3 Tp4 Tp15 Tp102/104 Tr1 Tr5 Tr6 Tr11 Tr12 Tr20 Tr201/203 Tr202 Tw1 Tw12 Ty1 Ty2 Ty3 Ty4 Ty5
Narrow gauge	Px27 Px29 Px38 Px48 Px49 T49 Tw47 Tw53 Tx23 Tx26

Multiple units

Electric	14WE/EN61 19WE 33WE 35WE 36WE EW51 EW52 EW53 EW54 EW55 EN56 EN57 EW58 ED59 EW60 EN62/EN76/EN96 ED70 EN71 ED72 ED73 ED74 EN75/ER75/ED160 EN77 ED78 EN80 EN81 EW90 EW91 EW92 EN94 EN95 EN97 EN100 ED161 ED250
Diesel	222M 810** MR/MRD** SN51 SN52 SN60 SN61 SD80** SN80 SN81 SN82** SN83** SN84** SD85** SA101 SA102 SA103 SA104 SA105 SA106 SA107 SA108 SA109 SA110 SA131 SA132 SA133 SA134 SA135 SA136 SA137 SA138 SA139 VT627**

Metro cars