NS 3850

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Power typeSteam
Power typeSteam
BuilderHumboldt, Linke-Hofmann, Henschel, Berliner Maschinenbau AG (Schwartzkopff)
Build date1945
NS 3850
Type and origin
Power typeSteam
BuilderHumboldt, Linke-Hofmann, Henschel, Berliner Maschinenbau AG (Schwartzkopff)
Build date1945
Total produced5 (In service with the NS)
Specifications
Configuration:
​
 • Whyte4-6-0
 • UIC2'C
Gauge1,435 mm (4 ft 8 1⁄2 in)
Leading dia.1,000 mm (3 ft 3 in)
Driver dia.1,750 mm (5 ft 9 in)
Length18,590 mm (61 ft 0 in)
Height4,550 mm (14 ft 11 in)
Loco weight78 t (86 short tons; 77 long tons)
Tender weight50 t (55 short tons; 49 long tons)
Fuel typeCoal
Fuel capacity7 t (7.7 short tons; 6.9 long tons)
Water cap.21.5 m3 (4,700 imp gal)
Firebox:​
 • Grate area2.64 m2 (28.4 sq ft)
Boiler pressure12 kg/cm2 (170 psi)
Heating surface:​
 • Tubes3851 – 3852: 127 m2 (1,370 sq ft),
3853 – 3854: 135 m2 (1,450 sq ft),
3855: 136.6 m2 (1,470 sq ft)
Superheater:
​
 • Heating area3851 - 3854: 58.9 m2 (634 sq ft), 3855: 54.3 m2 (584 sq ft)
Cylinders2
Cylinder size575 mm × 630 mm (22.6 in × 24.8 in)
Valve gearWalschaerts
Performance figures
Maximum speedForwards: 100 km/h (62 mph),
Backwards: 50 km/h (31 mph), Backwards: 85 km/h (53 mph) (If fitted with a wannentender)
Tractive effort10,000 kgf (22,000 lbf)
Career
OperatorsNS
Numbers3851 – 3855
Withdrawn1947
PreservedNo engines that were in service with the NS

The NS 3851–3855 was a series of locomotives was in service at the Dutch Railways shortly after the Second World War. They were originally German locomotives.

As a successor to the P6, the Prussian P8 was developed by Robert Hermann Garbe. The locomotive was built by the Berliner Machinenbau AG and was intended for the Königlich Preußische Staatseisenbahnen (K.P.St.E.). The first locomotives initially showed some weaknesses, such as wrongly dimensioned connecting rods and a tender that ensured that the locomotive could not run faster than 45 km/h backwards. Over the years, various adjustments were made to the P8, such as the use of a DB tender (wannentender) for the P8, which greatly improved the running characteristics of the locomotive backwards and which was now able to achieve a speed of 85 km/h running in reverse. (the Dutch locomotives had no wannentenders).

Service with the NS

Gallery

Sources

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