What is the idle oil pressure during aerobatics/spins and for how long can it stay in that range?

The idle oil pressure during aerobatics and spins is correctly noted as ranging from 15 to 40 PSI, and this condition can be maintained for up to 5 seconds. Maintaining oil pressure within this acceptable range is crucial because it ensures proper lubrication of the engine components even during dynamic flight maneuvers.

Understanding the limits for oil pressure is vital for flight safety and engine health. When operating in aerobatic situations, which can cause fluctuations in oil pressure due to changes in position and orientation, knowing the specific thresholds helps pilots manage their performance without risking damage to the engine or subsystems. Staying within the specified range for a limited duration (in this case, 5 seconds) allows pilots to safely execute aerobatic maneuvers while ensuring that the engine continues to receive adequate lubrication.

In contrast, the other options either present incorrect pressure ranges or exceed the safe limits, which may lead to concerns about engine performance and reliability during those critical flight phases. Thus, the choice of 15 to 40 PSI is not only accurate but also aligns with operational guidelines for safely conducting aerobatic flight.