Class
BB1 4-Cylinder Compound Mallet Tank Locomotive
Designed
by Karel Belčamin
Built
in 1902 by Maschinenfabrik Esslingen, Esslingen, Germany
The
docks at Bevice-Pofedra have always presented a challenge to the RSR's
engineers, who were repeatedly called upon to provide shunting
locomotives for the extensive network of connecting lines and sidings
there. The class O 0-8-0s had acquitted themselves very well but were
showing their age (having been introduced in 1878) and an annoying
tendency to derail on the particularly sharp curves around the South
Basin. The Mallet type, although not new, seemed ideally suited to the
task and Belčamin ordered twelve of these elegant tank engines from
Esslingen in 1902. Their flexible wheelbase allowed them
to run anywhere without the slightest difficulty and four axles
afforded sufficient adhesion. As is often the case with "niche"
designs, the BB1s were protected from usurping successors for many
years, effortlessly seeing off the D6 4-8-0s. After being joined by Bela
Šahlmeti's 0-6-0s of 1920 they
were finally supplanted by that engineer's 0-8-0s of 1928. Owing to
their ability to negotiate awkward sidings, seven of the class were
sold to industrial concerns, three of them to the Amšunt Chemical Works in
Kalmorska. One of these is preserved in working order and kept at
Plizif RK shed.
Text and graphics © Norman Clubb 2012