PKP class Pt47

PKP Pt47
Pt47 locomotive
Type and origin
Power typeSteam
BuilderFablok (120) nos. 1–100, 161–180
Cegielski (60) nos. 101–160
Build date1948–1951
Total produced180
Specifications
Configuration:
​
 • Whyte2-8-2
 • UIC1′D1′ h2
Gauge1,435 mm (4 ft 8+1⁄2 in) standard gauge
Leading dia.1,000 mm (39.37 in)
Driver dia.1,850 mm (72.83 in)
Trailing dia.1,200 mm (47.24 in)
Tender wheels1,000 mm (39.37 in)
Minimum curve150 m (492 ft 2 in)
Length24.255 m (79 ft 7 in)
Axle load18.0 tonnes (17.7 long tons; 19.8 short tons)
Adhesive weight83.2 tonnes (81.9 long tons; 91.7 short tons)
Loco weight104.2 tonnes (102.6 long tons; 114.9 short tons)
Tender weight77.9 tonnes
Total weight182.1 tonnes (179.2 long tons; 200.7 short tons)
Tender type33D48
Water cap.33 m3 (1,200 cu ft)
Tender cap.17.0 tonnes (16.7 long tons; 18.7 short tons)
Firebox:​
 • Grate area4.5 m2 (48 sq ft)
Boiler pressure15 kg/cm2 (1.47 MPa; 213 psi)
Heating surface:​
 • Firebox19.8 m2 (213 sq ft)
 • Total surface239.2 m2 (2,575 sq ft)
Superheater:
​
 • Heating area99 m2 (1,070 sq ft)
CylindersTwo, outside
Cylinder size630 mm × 700 mm (24.80 in × 27.56 in)
Performance figures
Maximum speed110 km/h (68 mph)
Power output2,000 hp (1,500 kW)
Tractive effort13,500 kgf (29,760 lbf)
Career
OperatorsPKP
ClassPt47
NumbersPt47-1 to Pt47-180
LocalePoland

PKP Class Pt47 is a Polish steam locomotive. An improvement of the successful pre-war PKP class Pt31 class, the main difference is the addition of circular tubes in the fire chamber, thereby significantly increased boiler performance. This class also featured a superheater and many have mechanical stokers to feed coal into the firebox. 180 locomotives were built in total between 1948 and 1951.[1] The designation stood for fast passenger (P) 2-8-2 (t) locomotive designed in 1947.

Although heavy, the Pt47 is powerful and fast. Its main use was to carry heavy fast passenger trains, especially on long distance routes, for example on the difficult route from Cracow to Krynica. They were withdrawn from regular service in 1988.[1] Fifteen survived, mostly in non-working condition.[1]

The Pt47 easily reached speeds of 100 km/h (62 mph), with a heavy train, although is not as refined as the PKP class Pm36 - especially on routes with a lower quality track. A maximum speed of 110 km/h (68 mph) could be achieved even with a train of 600 tonnes (590 long tons; 660 short tons). In the 1950s these machines were could travel 824 km (512 miles) per day.[2]

At first, German tenders from class 41 or 44 locomotives were used, designated 34D44.[1] From 1949, Polish tenders 33D48 were manufactured in Pafawag, next rebuilt to 27D48, when fitted with a mechanical stoker (water capacity 33 m3, then 27 m3).[1]

Nicknames

  • Petucha - after the first two letters of the name

References

  1. ^ a b c d e Bogdan Pokropiński (2007). Parowozy normalnotorowe produkcji polskiej (in Polish). pp. 148–150, 255.
  2. ^ Paweł Terczyński. "Parowóz serii Pt47". Świat Kolei (in Polish). No. 5/2016. p. 18.
Wikimedia Commons has media related to PKP class Pt47.
  • "Pt47 article at Steam locomotives site". Retrieved February 20, 2006.
  • Bogdan Pokropiński (2007). Parowozy normalnotorowe produkcji polskiej [Normal gauge steam locomotives of Polish manufacture] (in Polish). Warsaw: Wydawnictwa Komunikacji i Łączności. ISBN 978-83-206-1617-0.
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