O & P Powerplant Ch1 Recirocating Engines – Flashcards
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The body's response to injury or disease
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Inflamation
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What is the purpose of dynamic dampers on crankshafts?
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They reduce engine vibration. JSPT 1-9
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What types of bearings are generally found in reciprocating engines?
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Plain, ball and roller bearings. JSPT 1-11
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Are the connecting rods used in each cylinder of radial engine the same? Explain.
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No. Radial engines use master and articulation rod assemblies. JSPT 1-13
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Name the different types of piston rings.
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Oil control., compression and oil scraper. JSPT 1-16
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Where should piston ring gaps be installed relative to each other, and why?
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Compression ring gaps should be staggered so that they do not align. This prevents excessive blow-by. JSPT 1-16
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What could result from incorrectly installed piston rings?
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Excessive oil consumption. JSPT 1-16
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What purpose do oil control rings serve?
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They regulate the thickness of the oil film on the cylinder walls. JSPT 1-17
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What is used to help prevent valve surge or floating in an aircraft engine?
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Two or more springs are used on each valve. JSPT 1-24
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On engines equipped with hydraulic valve lifters, what should the running valve clearance be?
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Zero. JSPT 1-29
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What is the purpose of valve overlap?
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It allows better volumetric efficiency and lowers cylinder operating temperatures. JSPT 1-36
