CLASS 24

Sub class:

24/0

24/1

TOPS number range:

24001-24049

24050 24150

Original 1948 number range:

D5000-D5049

D5050-D5150

Former class codes:

D11/1, later 11/1

D11/3, later 11/1A

Built by:

BR Derby, Crewe

BR Crewe, Derby and Darlington

Introduced:

1958-59

1959-1961

Wheel arrangement:

Bo-Bo

Bo-Bo

Weight (operational):

77-79 tonnes

71-73 tonnes

Height:

12ft 8in

12ft 8in

Width:

8ft 10in

8ft 10in

Length:

50ft 6in

50ft 6in

Min curve negotiable:

4 1/2 chains

4 1/2 chains

Maximum speed:

75mph

75mph

Wheelbase:

36ft 6in

36ft 6in

Bogie wheelbase:

8ft 6in

8ft 6in

Bogie pivot centres:

28ft

28ft

Wheel diameter:

3ft 9in

3ft 9in

Brake type:

Vacuum

Vacuum

Sanding equipment:

Pneumatic

Pneumatic

Route availability:

6

6

Heating type:

Steam - Stones OK 4616 or 4610

Steam - Stones OK 4610

Multiple coupling restriction:

Blue Star

Blue Star

Brake force:

38 tonnes

38 tonnes

Engine type:

Sulzer 6LDA28A

Sulzer 6LDA28A

Engine horsepower:

1,160hp

1,160hp

Power at rail:

843hp

843hp

Tractive effort:

40,0001b

40,0001b

Cylinder bore:

11 in

11 in

Cylinder stroke:

14 in

14 in

Main generator type:

BTH RTB15656

BTH RTB15656

Aux generator type:

BTH RTB7440

BTH RTB7440

Number of traction motors:

4

4

Traction motor type:

BTH 137 BY

BTH 137 BY

Gear ratio:

16:81

16:81

Fuel tank capacity:

63Ogal

63Ogal

Cooling water capacity:

187gal

187gal

Lub oil capacity:

10Ogal

10Ogal

Boiler water capacity;

60Ogal

60Ogal

Boiler fuel capacity:

From main supply

From main supply