On the last day of the 2020 season, heavy cogwheel steam locomotive HG 4/4 number 704 (built by SLM in 1923) pulls Train 133 from Realp over the Furka pass to Oberwald approaching the Reussbrücke. As the train entered the 11 percent rack section the engineer opened the throttle wide and a large cloud of steam filled the sky. The temperature was slightly below 0 degrees Celsius (32 F). The consist weighed about 63 tons which is slightly more then what a standard HG 3/4 locomotive is allowed to pull - 27 Sep 2020 Georg Trüb.