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美国Norfolk和western铁路正在探索整編列車中使用136.36吨(150美吨)漏斗車的潜力。在用試驗車作載荷試运时,除由其过大尺寸和过高的总載荷所引起的問题外,并沒有发現任何限制。試車是从一个特定的起点到一个特定的終点间进行的,該車軌面总重达179.31吨,对于許多綫路来說是太高了,因此,不能作为一般联运用。事实上,軌面总重决定于165×305毫米的滾柱軸承,这种軸承的尤許軌面載荷每辆为29.89吨或对两个二軸轉向架为119.56吨,对两个三軸轉向架为179.32吨。在試驗車上,該铁路使用了旧的三軸蒸汽机車煤水車轉向架,使自重增加到49.68吨,这意味着最大載荷为133.18吨,但該铁路相信采用合适的轉向架自重能控制到42.95吨,使載荷达136.36吨。虽然滿意的轉向架尚未生产,但三軸轉向架的設計是存在的,也是滿意的。
The U.S. Norfolk and western railroads are exploring the potential of using a 136.36 tonne (150 US tonne) hopper car in the integrated train. During the test run with a test car, no restrictions were found except for the problems caused by its excessive size and excessive total load. The test run was carried out from a specific starting point to a specific end point, totaling 179.31 tonnes, which was too high for many routes and therefore not to be used as a general purpose connection. In fact, the total weight of the rail surface is determined by a roller bearing of 165 x 305 mm, with an allowable orbital load of 29.89 tons per vehicle or 119.56 tons for two biaxial bogies, Stand for 179.32 tons. In the test car, which used the old tri-axial steam locomotive semitrailer, increased its weight to 49.68 tons, which means the maximum load was 133.18 tons, but the railway believed its weight could be controlled to 42.95 by a suitable bogie Ton, so that the load reached 136.36 tons. Although satisfactory bogies have not yet been produced, the design of triaxial bogies is present and satisfactory.