Recip Engines Flashcards
What is the purpose of dynamic dampers on a crankshaft?
They reduce engine vibration
What types of bearings are generally found in reciprocating engines?
Plane, ball and roller bearings
Are the connecting rods used in each cylinder of a radial engine the same? Explain.
No. Radial engines use master and articulating rod assemblies.
Name the different types of piston rings.
Oil control, compression and oil scraper
Where should piston ring gaps be installed relative to each other and why?
Compression ring gaps should be staggered so they do not align. This prevents excessive blow by.
What could result from incorrectly installed piston rings?
Excessive oil consumption
What purpose do oil control rings serve?
They regulate the thickness of the oil film of the cylinder walls
What is used to help prevent valve, surge or floating in an aircraft engine?
Two or more springs are used on each valve
On engines equipped with hydraulic valve lifters what should the running valve clearance be?
Zero
What is the purpose of valve overlap?
It allows better volumetric efficiency and lowers cylinder operating temperatures.
