CLASS 22

1957 BR number range:

D6300-D6357

Former class codes:

D6300-D6305 - D10/2A, later 10/4A
D6306-D6357 - D11/5, later 11 /4A

Built by:

NBL

Introduced:

1959-1962

Wheel arrangement:

B-B

Weight (operational):

65-68 tonnes

Height:

12ft 10in

Width:

8ft 8in

Length:

46ft 8 1/2in

Min curve negotiable:

4 1/2 chains

Maximum speed:

75mph

Wheelbase:

34ft 6in

Bogie wheelbase:

8ft 6in

Bogie pivot centres:

23ft

Wheel diameter :

3ft 7in

Brake type:

Vacuum

Sanding equipment:

Pneumatic

Route availability:

4

Heating type:

D6300-D6305 - Steam-Spanner Mkl D6306-D6357 - Steam - Clayton or Stones

Multiple coupling restriction:

D6300-D6305 - Orange Square
D6306-D6357 - White Diamond

Brake force:

29 tonnes

Engine type:

D6300-D6305 - MAN L12V18 21A
D6306-D6357 - MAN L12V18 21B

Engine horsepower:

D6300-D6305 - 1,000hp
D6306-D6357 - 1,100hp

Power at rail:

D6300-D6305 - 800hp
D6306-D6357 - 810hp

Tractive effort:

D6300-D6305 - 40,0001b
D6306-D6357 - 38,0001b

Cylinder bore:

7 3/4in

Cylinder stroke:

8 1/4in

Transmission type:

Voith LT306r

Fuel tank capacity:

450gal

Cooling water capacity:

135gal

Lub oil capacity:

38gal

Boiler water capacity:

500gal

Boiler fuel supply:

From main tank