In order to achieve a larger loading space of 40 m3, the undercarriage and the wheel base of the previous Otmm Cars were extended by 500 mm. The first of these Cars with a capacity of 40 m3 was built by the Paderborn railway repair shop on a trial basis in 1961. The design stood the test, and so the railway repair shops of Kaiserslautern and Weiden built more than 16, 000 Otmm 70/Ed 090 Cars between 1961 and 1970, also using profiles of old but usable Omm 37 Cars. The Cars - referred to as Fc 090 from 1980 onwards - ran as single Cars and in block trains with bulk goods of all kinds. A shortage of hinged roof Cars led to the fact that they were also covered with tarpaulins and used for the transport of cereals. Consequently, 1, 500 Cars were equipped with hinged roofs in 1978/79 and referred to as Tdgs-z 932. Many other Cars received a load alteration switchover and were referred to as Fcs 090 or, after being adapted for further operation from 1991 onwards, as Fcs 092. In 1994, the DB AG took over even more than 8, 500 Fc (s) 090 Cars which were decommissioned until 2007. In 2012, around 2, 600 of the Fcs 092 Cars were still in service, another 786 Cars were used as Fcs-x 092 in coal transport.
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