Czech Railways class 842
originally M 274.2
The class 842 is a four-axle diesel railcar built for regional service on non-electrified mainlines. It is being powered by two six-cylinder diesel engines which drive the inner axle of each bogie. Two prototypes were built in 1989 which were designated M 274.2. After the collapse of Czechoslovakia, a revised variant was placed into production at Vagonka Tatra Studénka in what was now the Czech Republic. This was now designated class 842 according to the new scheme.
The production variant still had the same LIAZ engines, but the transmissions now came from Allison instead of Praga. Production switched to the more modern class 843 after 35 had been produced. They are being used together with driving trailers and various older trailer cars. In 2012, they were modernized with more powerful Tedom engines and five-speed ZF gearboxes.
Technical data
General
- Built
- 1989-1994
- Manufacturers
- Vagonka Tatra Studénka
- Wheel arrangement
- 1A-A1
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Length
- 25.20 m
- Wheelbase
- 19.60 m
- Service mass
- 46 t
- Adhesion mass
- 23 t
- Rigid wheelbase
- 2.30 m
- Axle load
- 11.5 t
Power plant
- Engine
- LIAZ M 1.2B ML 640 F
- Engine type
- 2x 6-cyl. diese1
Power
- Power source
- diesel-hydraulic
- Indicated power
- 424 kW (576 PS)
- Top speed
- 100 km/h
- Starting effort
- 60.0 kN
Calculated values
- Factor of adhesion
- 1 : 3.76
- Power-to-weight ratio
- 9.2 kW/t
- Adhesive weight/Total
- 1 : 2.00
