Under what condition is an erect spin permitted with landing gear and flaps retracted?

An erect spin is permitted with landing gear and flaps retracted specifically when power is at idle. In this scenario, the reduced power setting allows for more predictable and manageable flight characteristics during the spin. When the engine is at idle, the aircraft is less likely to experience excessive torque or yaw that could complicate recovery efforts.

Allowing the spin to occur under this condition minimizes the chance of power-induced stall situations and makes it easier for the pilot to perform recovery maneuvers. Keeping the landing gear and flaps retracted also ensures that the drag is minimized, which is crucial for maintaining control of the aircraft during a spin.

In contrast, other choices introduce variables that would generally make a spin more dangerous. For example, deploying speed brakes or attempting spins during high power settings can lead to unfamiliar behaviors in the aircraft, exacerbating recovery difficulties. Similarly, leveling the aircraft while in a spin might not position the pilot to recover efficiently and effectively from the situation.