CLASS 41 'Warship'

1957 BR number range:

D600-D604

Former class codes:

D20/2, later 20/4

Built by:

NBL Ltd

Introduced:

1958-59

Wheel arrangement:

A1A-A1A

Weight (operational):

118 tonnes

Height:

12ft 10in

Width:

8ft 8in

Length:

65ft

Min curve negotiable:

4 1/2 chains

Maximum speed:

90mph

Wheelbase:

50ft

Bogie wheelbase:

15ft

Bogie pivot centres:

35ft

Wheel diameter (driving):
Wheel diameter (middle):

3ft 7in
3ft 3 1/2 in

Brake type:

Vacuum

Sanding equipment:

Pneumatic

Route availability:

5

Heating type:

Steam - Spanner Mk 1

Multiple coupling restriction:

Orange Square
(diesel hydraulic locos)

Brake force:

88 tonnes

Engine type:

2 x NBL L12V 18/21A

Total horsepower:

2,000hp

Power at rail:

1,700 hp

Tractive effort:

50,0001b

Cylinder bore:

7.1 in

Cylinder stroke:

8.3 in

Transmission type:

Voith L306r

Fuel tank capacity:

800gal

Cooling water capacity:

?? gal

Lub oil capacity :

?? gal

Boiler water capacity:

1,000gal

Boiler fuel capacity:

From main tank