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A turbine engine may have as few as one moving part that rotates in the same direction at all times, and generally, it is content to remain inside the engine housing. A piston engine (internal combustion engine - ICE) is not so inclined. Piston engines have more moving parts, most of which are trying to exit the engine block, and, under certain circumstances, actually DO leave the engine block. The high part count, high pressure, and tendency to tear itself apart give the ICE increased loads and lubrication challenges that require increased attention and lower TBO times that a turbine doesn't require.

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