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Putt-Putt: The wonderful world of heat engines
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How does it work?
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The Question How does the length of the exhaust tube correlate with the strength of the engine? How does the size of the boiler affect engine performance?
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The Procedure Build a multitude of engines, each with a varying boiler length and long exhaust pipes. Test the engines in a boat and a known length of water. Record the time it takes the engine to complete the route. Cut off a section of exhaust pipe and go to step two.
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Bad The Reality In order to seal the engines, epoxy was used
Epoxy burns Three of the engines lost their seals Bad
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The Results The shorter the exhaust tube the lower the performance.
Perhaps the shorter the boiler, the better the performance.
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