Russian locomotive class VM

VM or BM

VM or BM class diesel-electric locomotive
Type and origin
Power type Diesel-electric
Build date 1934
Specifications
UIC class 2-Do-1+1-Do-2
Loco weight 2 x 123 tons
Prime mover Two Soviet-built diesel engines
MAN design
RPM range Max. 400 rpm
Transmission Diesel-electric
8 x 154 kW traction motors
Performance figures
Power output 2 x 1,050 hp (diesel)
Career
Number in class 1 pair

The VM or BM (Cyrillic script) was an experimental Soviet diesel-electric locomotive named after Vyacheslav Molotov (Russian: Вячеслав Молотов). It was a two-unit machine of 2-Do-1+1-Do-2 wheel arrangement and only one pair of locomotives was built.[1]

Powertrain

The two diesel engines were of the six cylinder, four stroke type. They were Soviet-built and based on the MAN engine used in the Soviet E el-5 locomotive. The MAN engine was rated at 1,200 hp at 450 rpm but the Soviet engines were de-rated to 1,050 hp at 400 rpm. The traction motors were similar to those used in the Soviet E el-12 locomotive but the rating of each motor was increased from 140 kW to 154 kW.

References

  1. ↑ Westwood, J.N. (1963). Soviet Railways Today. London: Ian Allan. page 69


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