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Hunting
trucks underneath rail cars can violently oscillate from
one rail to the other as they traverse along tangent track,
inducing excessive lateral forces that significantly contribute
to the rapid wear of rail and rail cars in a relatively
short time. This particular type of degraded vehicle performance
is a leading cause of damage to delicate lading. At a minimum,
hunting trucks cause increased fuel consumption. Unchecked,
severe damage to truck components and derailment can result.
More than 10% of the equipment-related derailments each
year could be avoided through greater Hunting Truck Detector
(HTD) network coverage.
Similar in design to the wayside Wheel Impact Load Detector (WILD), this add-on capability measures the array of lateral forces exerted by a hunting truck on a passing train. What's unique about the Salient design is that it takes into account the dynamic relationship between vertical and lateral loads; that is, the system compares simultaneous readings from a WILD and a HTD to identify critical instances where the wheel flange and rail gage face geometry may promote flange-climb derailments. These measurements are processed through a highly sophisticated proprietary algorithm and transformed into a Hunting Index to identify and alarm on vehicles that exhibit excessive side-to-side motion. If the forces exceed an acceptable threshold, an automatic report notifies the customer which truck requires action based on their tailored alarming requirements and long-term analytical needs.
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