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Tokyo Measurement Flaws Case Study

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Article Three: Disneyland Tokyo Measurement Flaw It is often misinterpreted how one crucial unit can result in what could have been a catastrophic event. For example, on December 5 in the year of 2003, Tokyo Disneyland’s Space Mountain roller coaster stopped abruptly before the end of the ride all because of a single measurement error. Before the ride has finished, one of the axles broke due to the inaccurate measurement of its design requirement. According to Case Studies: Metric/English Conversion Errors, “the gap between the bearing and the axle was over 1 mm – when it should have been a mere 0.2 mm”. Before 1995 Tokyo was still using English units for measurement but, they changed to metric units afterwards. Therefore, “44.14 mm axles”

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