Where does the oil for hydraulic lifters in a turbine engine typically come from?

The oil for hydraulic lifters in a turbine engine typically comes from the engine oil system. This is because hydraulic lifters rely on pressurized oil to operate effectively, utilizing it to adjust valve timing and actuation. The engine oil system is designed to provide continuous lubrication and to maintain the appropriate pressure of the oil throughout the engine, including delivering it to components like hydraulic lifters.

Having an adequate supply of oil not only lubricates various engine components but also helps ensure that hydraulic systems within the engine function correctly. The oil system is integral to the overall operation of the engine, offering essential properties such as cooling, cleaning, and sealing.

Other systems, such as the fuel system and coolant system, do not supply the necessary hydraulic fluid for lifters. The hydraulic fluid reservoir is not the correct source in this context as it typically relates to different hydraulic applications that might not involve the engine's oil system directly. Thus, the primary source of hydraulic lifter operation in turbine engines remains the engine oil system, which is specifically designed for this purpose.