The Dm6 and Dm7 were diesel multiple unit

Diesel multiple unit

A diesel multiple unit or DMU is a multiple unit train consisting of multiple carriages powered by one or more on-board diesel engines. They may also be referred to as a railcar or railmotor, depending on country.-Design:...

s built by Valmet

Valmet

' was a Finnish state-owned conglomerate. Valmet was formed in 1951, when the state of Finland decided to group their various factories working on war reparations to the Soviet Union under one company...

 in the 1950s and 1960s for Valtionrautatiet

VR Group

VR or VR Group is a state-owned railway company in Finland. Formerly known as Suomen Valtion Rautatiet until 1922 and Valtionrautatiet / Statsjärnvägarna until 1995...

. They are known by their nickname lättähattu (Finnish for "flat hat", the first widespread youth culture movement in Finland).

History

At the beginning of the 1950s it became clear that VR needed multiple units to compete with buses in short-distance traffic. In 1952, seven Dm6:s were ordered from Valmet, and eight more the next year.

After testing the Dm6:s and having noted that the new DMU:s worked well in Finnish conditions, VR ordered more units. In total, 197 Dm7 class multiple units were built with some modifications (a larger wheel size, for instance).

DmG7

Three Dm7:s (numbers 4145–4147) were transformed into goods transport vehicles. They were withdrawn in 1981.

Ttv

16 Dm7:s were transformed into electric maintenance vehicles.

Preservation

All Dm6:s have been withdrawn from service. 20 Dm7:s are preserved by Finnish museum railway associations.

External links