United Wagon Company received from Russian Federal Budgetary Organization “Register of Certification on the Federal Railway Transport” the certificates for two models of 6-axle articulated gondola car running on bogies with a 25 tonne axle load.
The increased load per unit length capacity makes it possible to raise the network carrying capacity and speed up the freight car turnover time.
The two articulated gondola cars, which were rolled out onto the market, have a capacity of 117 tonnes (the 12-6877 model) and 114.5 tonnes (the 12-6877-02 model). The articulated design increases the freight car loading capacity by 52–56%, while its load per unit length is 23% higher, allowing for a significant boost to the efficiency of freight transport, as it raises the network carrying capacity by 40%. Train mass can therefore be increased without any change in its length.
The gondola cars are equipped with an articulated joint, which combines two sections of the railcar and ensures unhindered passage through curved sections of track, including curves with small radii. The railcars are also equipped with three 18-9855 bogies with a 25-t axle load each. The braking system, which has a separate bogie brake, increases the efficiency and reliability of the braking process compared with traditional brake systems. The operating mechanism of the brake system in the model 12-6877-02 gondola car is integrated into the bogie design, reducing the tare weight of the build as well as the incidence of brake adjustment during operation.