| 11. | The engine cooling is via liquid in a water jacket.
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| 12. | Water jacket cooling systems were largely abandoned as unnecessary.
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| 13. | The inner and outer pairs of tubes were joined to form two double-walled water jackets.
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| 14. | The water-cooled M1917 was inappropriate due to weight and the vulnerability of the water jacket.
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| 15. | The machine that Wilkinson showed to him was cooled by air, instead of a water jacket.
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| 16. | It was difficult to cool this plug, as the water jacket didn't extend into the plug.
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| 17. | The cylinder was horizontal, pointing rearward, and was cast from iron with a copper water jacket.
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| 18. | Individual cylinders with sheet metal water jackets shared the aluminium alloy heads, four to a bank.
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| 19. | From here the hot gases travelled up through the boiler tubes which pass through the water jacket.
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| 20. | Otto engines use a flowing water jacket around the cylinder wall, similar to modern engine cooling systems.
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