The Re 6/6 of the Swiss state railroads SBB is still today with its power
of 7900 kW the strongest locomotive in the world (and Switzerland). It has
6 axels in the somewhat rare BoŽBoŽBoŽ order. The first 4 prototypes built
in 1972 had an articulated joint for improved bending in tight curves, but
this was omitted as unnecessary in the series of 1975 (shown). 

Photo of unidentified Re 6/6 at Basel station in May 1999 by Ilkka Siissalo (ilkka@smile.ch)