PKP class Pt47

PKP Class Pt47 is a Polish steam locomotive. Related to the successful 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.[1]

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 12 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)
Length23.835 m (78 ft 2 in)
Axle load18.7 tonnes (18.4 long tons; 20.6 short tons)
Adhesive weight83.2 tonnes (81.9 long tons; 91.7 short tons)
Loco weight105.5 tonnes (103.8 long tons; 116.3 short tons)
Tender type27D48
Tender cap.10.0 tonnes (9.8 long tons; 11.0 short tons)
Firebox:
  Firegrate area
4.49 m2 (48.3 sq ft)
Boiler pressure15 kg/cm2 (1.47 MPa; 213 psi)
Heating surface230.2 m2 (2,478 sq ft)
  Firebox19.8 m2 (213 sq ft)
Superheater:
  Heating area100.5 m2 (1,082 sq ft)
CylindersTwo, outside
Cylinder size630 mm × 700 mm (24.80 in × 27.56 in)
Performance figures
Maximum speed110 km/h (68 mph)
Tractive effort200 kN (44,960 lbf)
Career
OperatorsPKP
ClassPt47
NumbersPt47-1 to Pt47-180
LocalePoland

Although heavy, the Pt47 is powerful and fast. Its main use was to carry heavy fast trains, especially on long distance routes, for example on the difficult route from Cracow to Krynica.

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.

References

  • "Pt47 article at Steam locomotives site". Retrieved February 20, 2006.
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