| R Stock | |
|---|---|
 CP (red) and R (white) stock District line trains at Upminster station | |
| Stock type | Surface stock |
| In service | 1949–1983 |
| Successor | D78 Stock |
| Specifications | |
| Coupling system | Wedglock between units (see text) |
| Notes/references | |
 London transport portal | |
The London Underground R Stock electric multiple units were used on London Underground's District line from 1949 to 1983. Composed of new cars and converted Q38 Stock trailers, the cars were built and converted in three batches between 1949 and 1959. The cars were driving motors (DM) or non-driving motors (NDM), there being no unpowered trailers. The second batch, introduced in 1952, was constructed from aluminium, saving weight and one train was left unpainted as an experiment. Considered a success, trains were left unpainted or painted white or grey to match in 1963–68. Originally designed to operate in trains with six off-peak and eight cars during peak hours, the trains were reformed as fixed seven-car trains in 1971. R Stock trains were replaced by the D78 Stock and withdrawn between 1981 and 1983.