What is the clean acceleration limit when the T-6A is in a symmetric configuration?

The clean acceleration limit when the T-6A is configured symmetrically, meaning no external stores or configurations that would create drag, is indeed -1.0 g. This limit indicates the minimum amount of acceleration that can be experienced in a symmetric configuration while maintaining structural integrity. Negative g-forces in this context refer to the forces experienced in flight when the aircraft is subjected to maneuvers that could create an upward vector relative to the normal load factor.

In a clean configuration, the aircraft is capable of maneuvering without added drag from external stores, allowing for a range of operational limits. The negative limit reflects the capability of the aircraft to handle situations where the lift vector may momentarily drop below the weight of the aircraft. Understanding these limits is crucial for safe aircraft operation, especially in the context of acrobatic maneuvers or when encountering turbulence.

The other options are not reflective of the T-6A's performance characteristics. A limit of 0 would imply no change in acceleration, while 1.0 and 7.0 g limits would suggest a capability for higher positive accelerations than what is safe or structural for the maneuvering capabilities of the T-6A in symmetric flight.