Oldenburg P 4.1

Oldenburg P 4.1 DRG Class 36.12
Type and origin Builder Hanomag Build date 1896–1902 Total produced 19
Specifications Configuration: ​  • Whyte 4-4-0  • German P 24.14 Gauge 1,435 mm (4 ft 8+1⁄2 in) Leading dia. 1,000 mm (3 ft 3+3⁄8 in) Driver dia. 1,750 mm (5 ft 8+7⁄8 in) Wheelbase: ​  • Overall 6,300 mm (20 ft 8 in)  • incl. tender 12,075 mm (39 ft 7+1⁄2 in) Length: ​  • Over beams 15,263 mm (50 ft 1 in) Height 4,225 mm (13 ft 10+3⁄8 in) Axle load 13.7 t (13.5 long tons; 15.1 short tons) Adhesive weight 27.4 t (27.0 long tons; 30.2 short tons) Empty weight 40.0 t (39.4 long tons; 44.1 short tons) Service weight 45.2 t (44.5 long tons; 49.8 short tons) Fuel capacity 4 t (8,800 lb) coal Water cap. 12 m3 (2,600 imp gal; 3,200 US gal) Boiler: ​ No. of heating tubes 248 Heating tube length 3,650 mm (11 ft 11+3⁄4 in) Boiler pressure 12 kgf/cm2 (1,180 kPa; 171 lbf/in2) Heating surface: ​  • Firebox 1.92 m2 (20.7 sq ft)  • Radiative 8.72 m2 (93.9 sq ft)  • Tubes 110.75 m2 (1,192.1 sq ft)  • Evaporative 119.47 m2 (1,286.0 sq ft) Cylinders 2 Cylinder size 460 mm (18+1⁄8 in) Piston stroke 600 mm (23+5⁄8 in) Valve gear Walschaerts (Heusinger )
Performance figures Maximum speed 90 km/h (56 mph)
Career Numbers GOE: 107–111, 116, 129–134, 139–144, 150 DRG: 36 1201 – 36 1219 Retired 1925–1931

The steam locomotives of Oldenburg Class P 4.1 (later DRG Class 36.12) were German locomotives built for the Grand Duchy of Oldenburg State Railways (Großherzoglich Oldenburgische Staatseisenbahnen) between 1896 and 1902. They were based on a Prussian P 4.1 prototype and a total of 19 engines were procured up to 1902. Overall the Oldenburg engine was less powerful than its Prussian counterpart, because the grate area was smaller and the steam dome was omitted. The regulators was housed in the smokebox. The Deutsche Reichsbahn took them over in 1920 and allocated them numbers 36 1201 to 36 1219. They were retired in the 1930s.

They were coupled with tenders of class 3 T 12.

See also

• Grand Duchy of Oldenburg State Railways
• List of Oldenburg locomotives and railbuses
• Länderbahnen

References

• Spielhoff, Lothar (1990). Länderbahn-Dampf-Lokomotiven. Band 1: Preußen, Mecklenburg, Oldenburg, Sachsen und Elsaß-Lothringen (in German). Stuttgart: Franckh'sche Verlagshandlung. ISBN 3-440-06145-0.
• Weisbrod, Manfred; Müller, Hans; Petznik, Wolfgang (1976). Dampflokomotiven deutscher Eisenbahnen, Baureihe 01–39 (EFA 1.1) (in German) (3rd ed.). Düsseldorf: Alba Buchverlag. pp. 213–215. ISBN 3-87094-081-6.