System and Method for Modification of a Baseline Ballast Arrangement of a Locomotive

A system for modification of a baseline ballast arrangement of a locomotive having an overall tractive effort rating based on symmetrical distribution of weight and driving torque applied by the locomotive to the respective axles of the locomotive, the system comprising:

• a locomotive truck comprising a first axle, a second axle, and a third axle, the first axle of the truck uncoupled from a traction system of the locomotive, and the second axle and the third axle of the truck coupled to the traction system of the locomotive;
• a first suspension assembly coupling the first axle to the truck configured to apply to the first axle a first portion of a locomotive weight;
• a second suspension assembly coupling the second axle to the truck configured to apply to the second axle a second portion of the locomotive weight;
• a third axle of the locomotive truck coupled to the traction system of the locomotive;
• and
• a third suspension assembly coupling the third axle to the truck configured to apply to the third axle a third portion of the locomotive weight;
• the second portion of the locomotive weight and the third portion of the locomotive weight applied to the respective second axle and third axle different from the first portion of the locomotive weight applied to the first axle so that the locomotive weight is asymmetrically distributed to the first axle, the second axle, and the third axle, wherein the asymmetrical distribution is configured to allocate more weight to the second axle and the third axle to transmit corresponding incremental amounts of tractive effort for a given amount of a driving torque applied to the second axle and the third axle via the traction system of the locomotive, and further wherein an amount of locomotive weight allocated from the first axle to the second axle and the third axle allows modification of a baseline ballast arrangement by reducing an amount of ballast in the baseline ballast arrangement corresponding to the amount of locomotive weight allocated from the first axle to the second axle and the third axle.

A method for modification of a baseline ballast arrangement of a locomotive having an overall tractive effort rating based on symmetrical distribution of weight and driving torque applied by the locomotive to the respective axles of the locomotive, the method comprising:

• providing a locomotive truck comprising a first axle and a second axle, the first axle of the truck uncoupled from a traction system of the locomotive, and the second axle of the truck coupled to the traction system of the locomotive;
• coupling the first axle to the truck with a first suspension assembly configured to apply to the first axle a first portion of a locomotive weight;
• coupling the second axle to the truck with a second suspension assembly configured to apply to the second axle a second portion of the locomotive weight different from the first portion of the locomotive weight being applied to the first axle, so that the locomotive weight is asymmetrically distributed to the first axle and the second axle, wherein the asymmetrical distribution is configured to allocate more weight to the second axle to transmit a corresponding incremental amount of tractive effort for a given amount of a driving torque applied to the second axle via the traction system of the locomotive, and
• modifying a baseline ballast arrangement of the locomotive by reducing an amount of ballast in the baseline ballast arrangement corresponding to an amount of weight allocated from the first axle to the second axle.