DR1 diesel train

The ДР1 (DR1 ) is a wagon factory in Riga (RVR ) in present-day Latvia trainset built specifically for fast suburban services on non-electrified broad gauge tracks. The photo shows a DR1A with a slightly different head shape.


While most suburban lines were electrified at an early stage in the former Soviet Union, was a need for efficient DMUs for the less frequented, and thus non-electrified suburban railways.

Thus arose in 1963 in the Riga wagon factory, two prototype vehicles were subjected to thorough testing. In 1964 the serial production of a total of 54 train sets arose. A trainset consists of two engines and two intermediate cars.

In the summer the train set on the basis of the now missing energy supply for the car heater two further means cars can be settled without that there is impairment of driving performance.

The vehicles sat in the suburbs quickly and formed the basis for further developments as the series railcars ДР1А developed from it. Similarly, the number ДР2 was developed from it. In this series, the drive motors were placed under the floor, which led to an increase in the space available.

From the literature it can be seen that the series ДР1А 2012 is still in use in the Baltics. There she is in transport, but also on long-haul routes, such as Tallinn - Saint Petersburg in use. In the future, they should be replaced by new vehicles from Stadler Rail ..

Technical descriptions

The trainset consists in the standard version of two motor cars at the top of the vehicle and two non-powered intermediate cars. The technical data given refers to the version with two intermediate cars.

The installed power can be economically exploited, they have laid great emphasis in the construction of vehicles on the lightweight. The car bodies are therefore a self-supporting structure made ​​of light metal profiles. The side plates are ribbed and have a speed of 1.4 - 2,5 mm. The forehead of the leading motor car was running with the prototypes as the SZD series ЭР1 in the series vehicles you have it more modern. Exist within the trainset transition possibilities between the individual vehicles that end cars do not have a transition opportunity. As a train and shock device, the vehicle has the usual SA-3 central buffer coupling.

The bogies are a special construction to save weight. The motor bogies are designed drehzapfenlos and via link to the main frame. They are connected through the coil springs to the main frame. In addition, rubber elements ensure a smoother running of the vehicle. The brakes are designed as disk brakes. On each axle shaft two cast-iron brake discs are arranged. The brake shoes are made of plastic.

The passenger compartments are designed as open seating with seats of the second class. Here, the railcar ten compartments, the middle car has twelve compartments. Two entry rooms are arranged per car. The seating configuration is 2 3. The passenger compartments are pressurized air heated and air-conditioned.

The machinery is self-contained and disposed respectively at the cab end of the machine carriage. The diesel engine and the hydraulic transmission is mounted on the main frame of the vehicle. The power is transmitted to the drive axles and auxiliary transmissions is performed by Joint waves. The train set is controlled by a multiple unit control. The usual monitoring and safety devices are present.