Powered Rail Car Train Pioneer. In 1914, the KPEV purchased a total of 6 three-unit powered rail car trains for the route in Silesia between Nieder Salzbrunn and Halbstadt with its many grades. These 6 trains were acquired to better manage the constantly increasing passenger volumes in this region. These rail car trains were initially designated as the E.T. 501-506, and they had a visually striking design that was based in part on the express train passenger cars commonly in use at that time with their clerestories, truss rods, and inset doors. The paint scheme in green/beige followed KPEV practice. The motor car located between the two cab control cars ensured good running characteristics on routes with curves. Since the passenger volumes into what was now Czechoslovakian Halbstadt almost died off after World War I, these rail car trains were used on other routes. These trains were subsequently taken into the DRG roster and painted in the cream/red scheme for powered rail cars at that time. After World War II, three of these trains came to Bavaria and were used there until 1959. The long years of service are proof of the successful and durable design from the pioneer days of rail car trains.