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What is a “chassis” Dynamometer, or “rolling road” Dynamometer?

April 26, 2017Automotive chassis dynamometer dyno rollers Testing

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What is a “chassis” Dynamometer, or “rolling road” Dynamometer?

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Pretty simple really! Its a dynamometer that can measure power while the engine is still in the chassis. By running the wheels on a rolling road or roller, or “drum” as shown here! Most vehicles are tested using these. Car ones are the same, but use a wider drum, or a pair of drums. 4X4 versions are also becoming more popular.