CLASS 55 'Deltic'

TOPS number range:

55001-55022

1957 BR number range:

D9000-D9022

Former class codes:

D33/1, later 33/2

Built by:

English Electric, Vulcan Foundry

Years introduced:

1961-62

Wheel arrangement:

Co-Co

Weight:

100 tonnes

Height:

12ft 11in (3.94m)

Length:

69ft 6in (21.18m)

Width:

8ft 91/2in (2.68m)

Wheelbase:

59ft 6in (18.14m)

Bogie wheelbase:

13ft 6in (4.11m)

Bogie pivot centres:

45ft 0in (13.72m)

Wheel diameter:

3ft 7in (1.09m)

Min curve negotiable:

4 chains (80.46)

Engine type:

2 x Napier D18.25 ‘Deltic’

Engine output:

Total - 3,300hp (2,460kW)

Power at rail:

2,460hp (1,969kW)

Tractive effort:

50,000lb (222kN)

Cylinder bore:

7in (0.18m)

Cylinder stroke:

3 3/4in (0.095m)

Maximum speed:

100mph (161km/h)

Brake type:

Vacuum, later changed to Dual

Brake force:

51 tonnes

Route availability:

5

Heating type:

Dual, steam later removed

ETS index:

66

Multiple coupling type:

Not fitted

Main generator type:

2 x English Electric EE829-1A

Aux generator type:

2 x English Electric EE913-1A

Traction motor type:

English Electric EE538A

No of traction motors:

6

Gear ratio:

59:21

Fuel tank capacity:

826gal (3,755lit)

Cooling water capacity:

33gal (150lit)

Lub oil capacity:

50gal (227lit)

  Present operator:

  Private sector