What is the expected minimum amount of battery power available for the battery bus items when the bus tie is open?

The expected minimum amount of battery power available for the battery bus items when the bus tie is open is 30 minutes. This duration is based on the T-6A's design and systems, which ensure that even when the bus tie, that connects the battery and generator bus, is open, there is sufficient power reserve for essential systems.

The 30-minute expectation is critical for flight safety; it provides enough time for pilots to handle emergencies, such as a generator failure, by allowing them to operate vital instruments and communication equipment. This design consideration takes into account the operational needs and potential contingencies that might arise during flight.

This value is established through testing and operational performance assessments, ensuring that the battery can adequately support the necessary electrical loads under these conditions. Therefore, knowing that the battery will provide this minimal runtime is crucial for pilots when making flight plans or assessing electrical system integrity in real-time scenarios.