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10 Cards in this Set
- Front
- Back
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What is the purpose of dynamic dampers on crankshafts
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They reduce engine vibration
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What types of bearings are generally found in reciprocating engines
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1. Plain
2. Ball 3. Roller |
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Are the connecting rods used in each cylinder of a radial engine the same? Explain
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No. Radial engines use master and articulating rod assemblies
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Name the different types of piston rings
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1. Oil control
2. Compression 3. Oil scraper |
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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
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What could result from incorrectly installed piston rings
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Excessive oil consumption
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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
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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
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On engines equipped with hydraulic valve lifters, what should the running valve clearence be
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Zero
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What is the purpose of valve overlap
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1. It allows better volumetric efficiency
2. lowers cylinder operating temperatures |
