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British Rail classes 21 and 29 and North British type 2
The class 21 was a short-lived type of four-axle diesel-electric locomotives built by North British between 1958 and 1960. The first 38 were delivered to the Eastern Region and numbered D6100 to D6137. They had 1,000 ...
| British Rail classes 21 and 29 and North British type 2Remove | |
|---|---|
| Variant | D6138 - D6157 |
| Built | 1958-1960 |
| Manufacturers | North British |
| Wheel arrangement | BoBo |
| Gauge | 1435 mm |
| Length | 15697 mm |
| Service mass | 73700 kg |
| Top speed | 121 km/h |
| Power | |
| Engine | MAN L12V18/21S |
General
| Property | British Rail classes 21 and 29 and North British type 2D6138 - D6157 |
|---|---|
| Built | 1958-1960 |
| Manufacturers | North British |
| Wheel arrangement | B-B |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | British Rail classes 21 and 29 and North British type 2D6138 - D6157 |
|---|---|
| Length | 15.70 m |
| Wheelbase | 11.28 m |
| Service mass | 73.7 t |
| Adhesion mass | 73.7 t |
| Axle load | 18.4 t |
Power plant
| Property | British Rail classes 21 and 29 and North British type 2D6138 - D6157 |
|---|---|
| Engine | MAN L12V18/21S |
| Engine type | V12 diesel |
Power
| Property | British Rail classes 21 and 29 and North British type 2D6138 - D6157 |
|---|---|
| Power source | diesel-electric |
| Indicated power | 820 kW (1,115 PS) |
| Top speed | 121 km/h |
| Starting effort | 200.2 kN |
Calculated values
| Property | British Rail classes 21 and 29 and North British type 2D6138 - D6157 |
|---|---|
| Factor of adhesion | 1 : 3.61 |
| Power-to-weight ratio | 11.1 kW/t |
| Adhesive weight/Total | 1 : 1.00 |
