What is the transient oil pressure limit during aerobatics/spins?

The transient oil pressure limit during aerobatics and spins is defined as 40 to 130 PSI. This range is established to ensure that the oil system remains functional despite the increased demand placed on it during maneuvers that involve significant changes in orientation and fluid dynamics.

In aerobatic flight or spins, rapid changes in aircraft attitude can cause variations in oil pressure and oil pickup due to fluctuation in gravitational forces on the oil system. The specified limit accommodates these fluctuations while ensuring that the engine lubrication system continues to operate effectively and safely.

With a limit that extends to 130 PSI, this range provides sufficient margin for transient conditions without risking damage to the engine or insufficient lubrication. This is particularly critical for maintaining engine health and performance during demanding flight scenarios. The range below this limit, such as those listed in other answer choices, would not adequately cover the required pressures for safe operation during such maneuvers.