How does the oil system accommodate inverted flight?

To accommodate inverted flight, an oil system is designed to ensure that the engine receives a continuous supply of lubricating oil even when the aircraft is in an inverted position. The correct answer involves using two oil pickup elements, which are strategically placed to operate effectively in different attitudes, including when the aircraft is inverted.

One pickup element typically remains submerged in oil during normal flight, while the second pickup element can maintain oil flow during inverted flight. This dual-pickup design ensures that oil is continuously available for lubrication, preventing engine damage or failure due to oil starvation.

The other options do not provide the reliability needed for inverted flight. Utilizing a single pickup element could lead to oil starvation when the aircraft is inverted, as the oil may not reach the single pickup point. Gravity drainage is not effective in maintaining lubrication during inverted flight since it relies on the orientation of the aircraft to direct oil to the engine. A vacuum system does not directly relate to the function of maintaining oil flow and would not be relevant for addressing the challenges posed by inverted flight in an oil system.