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 They were withdrawn from regular service in 1988.[1] Fifteen survived, mostly in non-working condition.[1]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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