Locomotive for freight trains. This was one of the last attempts to
increase the number of axles for locomotive rigid. Indeed the needs of
power previously required to use multiple units ie several locomotives
simultaneously for a convoy of which the quest for power to be replaced
by this model and after that to have articulated locomotive to limit
costs.
These are three-cylinder engines with the third attack the
second axle from which the largest gap between the first two axles and
thereafter. This also allowed not to have a first drive axle elbow that
was more fragile (having a bent axle or not remains debated).
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