British Rail Class 405
The Southern Railway (SR) gave the designation Sub to the wide variety of electric multiple units that were used on inner-suburban workings in the South London area. Originally these units were formed as three-car units, but in the 1940s, all surviving units were increased to four cars by the addition of an 'Augmentation' trailer. New four-car units were also built at this time, and these survived in passenger use until late 1983, by which time British Rail had allocated to them TOPS Class 405.
| British Rail Class 405 | |
|---|---|
 4Sub Motor Car at National Railway Museum in York | |
| In service | 1925-1983 |
| Manufacturer | SR Eastleigh |
| Number built | Unknown |
| Formation | power car + 2 trailer cars + power car |
| Operator | Southern Railway and British Railways |
| Specifications | |
| Maximum speed | 75mph 121km/h |
| Weight | DMBS - 39-43 tons |
| Engine(s) | Early units: 4 x 275 hp traction motors total 1,100 hp (821 kW) Later units: 4 x 250 hp traction motors total 1,000 hp (746 kW) |
| Braking system(s) | Air (Westinghouse) |
