During aerobatic flight, what should the oil pressure be maintained at or above?

In aerobatic flight, it is crucial to maintain the oil pressure at a level that ensures adequate lubrication and cooling for the engine, which experiences dynamic changes in load and orientation during maneuvers. The specified level of 40 psi is critical as it indicates the minimum pressure required to ensure that the oil system is functioning properly, providing sufficient flow to lubricate engine components effectively.

Operating below this pressure could lead to insufficient lubrication, increasing wear on engine parts, and potentially causing a reduction in engine performance or even damage. The 40 psi threshold is based on testing and operational experience, which ensures the T-6 aircraft can perform safely and efficiently during aerobatics. Therefore, maintaining the oil pressure at or above 40 psi supports the longevity and safety of the engine, ensuring its reliability during varied flight maneuvers.