What altitude is considered a prohibited threshold for spins in the T-6?

In the T-6A, spins are prohibited above an altitude of 22,000 feet. This prohibition exists because at higher altitudes, the air density is lower, which can significantly affect the aircraft's performance and control during spin recovery. The reduced effectiveness of aerodynamic surfaces and the potential for not being able to recover from a spin safely make it critical to stay below this threshold.

Operating above this altitude during spin maneuvers poses a significant risk, as there may not be enough altitude to recover effectively from the spin and potentially leads to dangerous situations. The specified altitude limit helps ensure pilot safety and aircraft integrity by establishing a clear operational boundary for performing spins.