PKP class Ok22

4 ft 8+1⁄2 in) standard gauge
1,524 mm (5 ft)
Russian RailwaysLeading dia.1,000 mm (39.37 in)Driver dia.1,750 mm (68.90 in)Wheelbase8.350 m (27 ft 4+3⁄4 in)Length18.612 m (61 ft 3⁄4 in)
18.940 m (62 ft 1+5⁄8 in)Height4.625 m (15 ft 2+1⁄8 in)Axle load17 tonnes (17 long tons; 19 short tons)Adhesive weight51.0 tonnes (50.2 long tons; 56.2 short tons)Loco weight78.9 tonnes (77.7 long tons; 87.0 short tons)Tender weight50 tonnes (49 long tons; 55 short tons)Tender cap.10 t (9.8 long tons; 11 short tons)Firebox:​ • Grate area4.01 m² (43.2 sq ft)Boiler pressure12 kg/cm² (1.2 MPa; 170 psi)Heating surface:​ • Firebox14.1 m² (152 sq ft) • Total surface182.1 m² (1,960 sq ft)Superheater:
​ • Heating area61.6 m² (663 sq ft)CylindersTwo, outsideCylinder size575 mm × 630 mm (22.6 in × 24.8 in)

Performance figures
Tractive effort	123 kN (27,650 lbf)

Career
Operators	PKP » DRB » PKP
Class	PKP: Ok22 DRB: 3845
Numbers	PKP: Ok22-1 to Ok-22-190 DRB: 38 4501 to 38 4630
Disposition	Two preserved, remainder scrapped

PKP class Ok22 is a class of ordinary passenger (O) 4-6-0 (k) steam locomotive designed in 1922 for Polskie Koleje Państwowe (Polish State Railways, PKP). It was the first locomotive designed in Poland after World War I, so the design work was done jointly with Hanomag, based on the Prussian P 8 (PKP class Ok1)

History

Introduction

The first five engines were built in Germany by Hanomag in 1923. Polish production started in 1928 and lasted until 1934 after which 185 locomotives had been manufactured by Fablok in Chrzanów.^[1] The first Polish-built locomotive (Ok22-6) was ready on December 31, 1928. Polish versions of the locomotive bore some improvements and changes compared with German ones, and were similar to PKP class Ty23. Ok22 locomotives were the first on the PKP to be equipped with electric lights.^{[citation needed]}

Wartime

After the German invasion of Poland in World War II, most Ok22 locomotives were taken into the Deutsche Reichsbahn fleet as 38 4501 to 38 4630.

Present day

Only two examples have survived. Ok22-23 in Jaworzyna Śląska and Ok22-31 in Wolsztyn. Ok22-31 was an operational engine. It ran until 1997, and after retirement became a stationary exhibit. In 2004 the machine was restored to working order again, and it ran until 2009. It is currently static.

See also

• PKP classification system

References

1. ^ Durrant 1972, p. 108.

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