Prussian G 8

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Prussian G 8
DRG Class 55.16–22
ÖBB Class 755
PKP Tp 3
FS Class 422
SNCB Type 80
standard gauge
Driver dia.1,350 mm (53.15 in)
Length:
​
 • Over beams16,938 mm (55 ft 6.9 in) (3 T 12) / 17,968 mm (58 ft 11.4 in) (3 T 16.5)
Axle load14.7 t (14.5 long tons; 16.2 short tons)
Adhesive weight58.5 t (57.6 long tons; 64.5 short tons)
Service weight58.5 t (57.6 long tons; 64.5 short tons)
Water cap.12.0 m3 (2,600 imp gal; 3,200 US gal) / 15.0 m3 (3,300 imp gal; 4,000 US gal) / 16.0 m3 (3,500 imp gal; 4,200 US gal) / 16.5 m3 (3,600 imp gal; 4,400 US gal)
Boiler pressure12 bar (1,200 kPa; 170 psi)
Heating surface:​
 • Firebox2.25 m2 (24.2 sq ft) / 2.35 m2 (25.3 sq ft)
 • Evaporative135.2 m2 (1,455 sq ft) / 140.0 m2 (1,507 sq ft)
Superheater:
​
 • Heating area31.7 m2 (341 sq ft) / 41.2 m2 (443 sq ft)
Cylinder size575 mm (22.64 in) / 590 mm (23.23 in) / 600 mm (23.62 in)
Piston stroke660 mm (25.98 in)
Performance figures
Maximum speed55 km/h (34 mph)
Indicated power809 kW (1,085 hp)
Career
NumbersDRG 55 1601–2268
Retired1969

The Prussian Class G 8 locomotives were eight-coupled, superheated, freight locomotives operated by the

Länderbahn
) locomotive, over 5,000 examples being built.

History

A total of 1,054 Prussian G 8 locomotives were built between 1902 and 1913 by various manufacturers. It was the first

superheated goods train locomotive in Prussia
, which is why it initially suffered from a host of teething troubles. One further problem was the restriction to a 14-tonne (14-long-ton; 15-short-ton) axle load; as a result many components had to be made too light in order to save weight. During its period of procurement constant modifications were made to the locomotives: the cylinder bore was increased from 575 to 600 mm (22.64 to 23.62 in); and the grate area, evaporative heating area and superheater area were also increased in size.

Seven engines were experimentally fitted with Stumpf parallel flow cylinders (Gleichstrom-Zylindern). Ten more were given

Lenz valve gear
. Neither of these variants improved on the standard design however.

Tp 3-36, ex 55 2199, Hanomag 6712-1913

After the

Second World War several more came from Poland
and were given the numbers of already retired engines between 55 1604 and 55 1710.

After the war the

GDR
the last one was retired in 1969, whereas the DB had retired them by 1955.

After the

ÖBB
keeping their serial numbers. Number 755.2180 was retired in 1954, and 755.1681 not until 1957.

Locomotive Nr. 4981 Mainz (see picture in the infobox) is in working condition. Built in 1913

Turkish Railways number 44 079.[5] In 1987, the still operational locomotive was purchased by German railway fans, to be hauled across Bulgaria, Yugoslavia and Austria to Germany and restored by the Darmstadt-Kranichstein Railway Museum. The journey, which had cost 47,000 deutschmarks of which 36,531 DM[6] were invoiced by Deutsche Bahn for the leg in Germany, is documented in a book.[7][page needed
]

Two units of the 22 assigned to Italy as war reparations (and classified by the Ferrovie dello Stato Italiane as FS Class 422) survive to this day, both property of the Museo Ferroviario Piemontese; one is exposed at Savigliano,[8] while the other is kept in a nearby railway station.[9]

The locomotives were equipped with Prussian tenders of classes pr 3 T 12, pr 3 T 16.5 and pr 2'2' T 16.

See also

Notes

  1. ^ a b "Typenblätter, Band Nr. 1, Baureihen 01-59". Eisenbahn Journal Archiv: 192. January 2002.
  2. ^ Weisbrod (1991), pp. 32–33.
  3. ^ "Stefan's Eisenbahnseite". S-erben.de. Retrieved 29 December 2008.
  4. ^ Horst Hansel. "G8 4981 Mainz vom Eisenbahnmuseum Darmstadt-Kranichstein". Weiltalbahn.de. Retrieved 29 December 2008.
  5. ^ "The Turkish G 8". Retrieved 29 December 2008.
  6. ^ "Der MEC-Münster, Nr. 7-4/2001" (PDF). p. 13.[permanent dead link]
  7. ISBN 3-613-71065-X
    .
  8. ^ "Locomotiva 422.009 "Lucia"". Museo Ferroviario Piemontese. Retrieved 4 October 2015.
  9. ^ "Locomotiva 422.022". Museo Ferroviario Piemontese. Retrieved 4 October 2015.

References

  • Weisbrod, Manfred (1991). Dampflokomotiven deutscher Eisenbahnen, Von Privatbahnen zur DRG (EFA 1.5) (in German). Düsseldorf: Alba. pp. 32–33.
    ISBN 3-87094-139-1
    .

Further reading
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