PKP class Pm36

PKP class Pm36 is a class of two express passenger (P) 4-6-2 (m) steam locomotives ordered in 1936 for the Polskie Koleje Państwowe (Polish State Railways).

PKP Pm36
Pm36-2 (Beautiful Helena)
Type and origin
Power typeSteam
BuilderFablok
Build date1937
Total produced2
Specifications
Configuration:
​
 • Whyte4-6-2
 • UIC2′C1′ h2
Gauge1,435 mm (4 ft 8 1⁄2 in) standard gauge
Leading dia.950 mm (37.40 in)
Driver dia.2,000 mm (78.74 in)
Trailing dia.1,150 mm (45.28 in)
Length24.843 m (81 ft 6 in)
Axle load17.2 tonnes (16.9 long tons; 19.0 short tons)
Adhesive weight51.6 tonnes (50.8 long tons; 56.9 short tons)
Loco weight94.0 tonnes (92.5 long tons; 103.6 short tons)
Tender weight72.9 tonnes (71.7 long tons; 80.4 short tons)
Tender cap.9.0 tonnes (8.9 long tons; 9.9 short tons)
Firebox:
 • Firegrate area		3.85 m2 (41.4 sq ft)
Boiler pressure18 kg/cm2 (1.77 MPa; 256 psi)
Heating surface198.0 m2 (2,131 sq ft)
 • Firebox15.00 m2 (161.5 sq ft)
Superheater:
​
 • Heating area71.2 m2 (766 sq ft)
CylindersTwo, outside
Cylinder size530 mm × 700 mm (20.87 in × 27.56 in)
Valve gearHeusinger (Walschaerts)
Loco brakeWestinghouse
Performance figures
Maximum speedPm36-1: 140 km/h (87 mph)
Pm36-2: 130 km/h (81 mph)
Power output1,325 kW (1,780 hp)
Tractive effort147.5 kN (33,160 lbf)
Career
OperatorsPKP » DRB » PKP
ClassPKP: Pm36
DRB: 186
NumbersPKP: Pm36-1 to Pm36-2
DRB: 18 601 to 18 601
NicknamesPiękna Helena
LocalePoland
Retired1965
Restored1995
Current ownerPKP

History

Design
Pm36-1

The design was ready in 1936 and the following year the first two prototypes were built. One of them (Pm36-1) had aerodynamic fairing. The construction as well as the shape of it was designed by inz. Kazimierz Zembrzuski, head of the design office in the First Polish Factory of Locomotives and at the same time professor of the Warsaw University of Technology. The other (Pm36-2) had a standard look. The idea was to test both engines in parallel to compare top speed, acceleration, coal and water consumption etc. The Pm36-1 won a gold medal at the 1937 International Exposition of Art and Technology in Paris.

Service

After the German occupation of Poland during World War II, the two locomotives were renumbered into the Deutsche Reichsbahn (DRB) fleet as 18 601 and 18 602 (class 186). The 18 601 had its streamlining removed,[1] but was later damaged and subsequently scrapped (probably in 1942). The 18 602 survived the war, and was returned to Poland where it regained its PKP class and number. It continued to work for PKP until 1965, when it was given to the Warsaw Railway Museum.

Present day

In 1995 the machine went through a major overhaul and is now working in Wolsztyn as a tourist attraction, called Beautiful Helen (pl. Piękna Helena). It is occasionally used in regular service, pulling trains to Poznań[2] or Leszno.[3] Currently Beautiful Helen waits for repair in Wolsztyn.[4]

See also

Notes
  1. Durrant 1972, p. 111.
  2. "Train no. 77333 Wolsztyn - Poznań". Retrieved 2011-12-30.
  3. "Train no. 70422 Wolsztyn - Leszno". Retrieved 2011-12-30.
  4. Czarnecki, Tomislaw. "Pm36-1". Wciaz pod para... Polskie parowozy.

References
  • Durrant, A. E. (1972). The Steam Locomotives of Eastern Europe. Newton Abbot, Devon, UK: David and Charles. ISBN 0-7153-4077-8.
  • Pokropiński, Bogdan (1987). Parowozy normalnotorowe produkcji polskiej dla PKP i przemysłu. Warszawa: Wydawnictwa Komunikacji i Łączności.
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