What must occur for the aircraft's pusher to activate under ice conditions?

The activation of the aircraft's pusher under ice conditions is governed by specific aerodynamic principles, particularly concerning the angle of attack. In scenarios where ice is present on the wings, there is a heightened risk of stall, and the pusher is engineered to activate as a precautionary measure when the aircraft approaches a stall condition.

For this safety feature to function correctly, it is necessary that all shaker and pusher activations happen at a decreased angle of attack. This is primarily because the pusher is designed to help the pilot recover from a stall situation, and preemptive activation can allow for better control of the aircraft by reducing the risk of stalling altogether.

By having the activations at a decreased angle of attack, the design aims to ensure that the pilot receives timely warnings and assistance, allowing for more effective corrective measures. The focus on maintaining control while compensating for the effects of ice ensures that the aircraft remains within safe operational parameters even under challenging conditions.