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Testing tank question

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Saw a TV program where they were testing scale models of a pickup truck in water to see if tailgate up or down gave less drag and better gas mileage. (tailgate UP is best). They used a jet pump in a circular tank - sort of a race track design. When I saw it, I thought of crank testing. However, if you want something that takes up minimal floor space, it needs to be a test chamber on top with the pump, return plumbing and other hardware underneath. As much of a pain in the neck as it is, I just save my cranks until I can tune them on the lake. The optimum scenario is a swimming pool where the lanes make it easy to see if they run straight and the depth markers make it easy to evaluate their dive characteristics. Hey, maybe the local YMCA needs a night watchman!

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