| 11. | The plug looks similar to a poppet valve.
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| 12. | Tyres are examples of poppet valves.
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| 13. | The engine was a vertical one with horizontal, opposed poppet valves for inlet and exhaust.
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| 14. | External wastegates generally use a valve similar to the poppet valve found in the cylinder head.
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| 15. | Lubrication is done by a dry sump lubrication system, the compressor valves are poppet valves.
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| 16. | As poppet valves came into use, a simplified valve gear using a camshaft came into use.
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| 17. | Thirty engines, numbers 73125 to 73154, were built with Caprotti valve gear and poppet valves.
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| 18. | Poppet valves date from at least the 1770s, when James Watt used them on his steam engines.
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| 19. | The sidevalve's poppet valves are usually sited on one side of the cylinder ( s ).
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| 20. | The valves, like other poppet valve Daimlers, had wide clearances, in some cases more than.
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