When lead announces base heading, at what KIAS should he initiate climb?

The correct answer is based on the typical operational procedures for multi-engine aircraft during a climb phase following lead's base heading announcement. Initiating a climb at a speed within the range of 220-250 KIAS (Knots Indicated Airspeed) is considered appropriate because it allows for effective handling, optimal climb performance, and adherence to the aircraft's operating limits.

This speed range provides a sufficient margin above stall speed while ensuring that the aircraft maintains adequate control and responsiveness during the transition from level flight to a climb. It also accounts for the need to achieve a balance between thrust and drag, as well as ensuring that the aircraft can gain altitude effectively while maintaining speed.

Climbing at speeds below 220 KIAS could compromise climb performance and safety, while speeds greater than 250 KIAS may exceed airspeed restrictions for certain airspace types, and could lead to increased drag and decreased climb performance. Therefore, initiating a climb within this specified speed range promotes a smoother transition into the climb maneuver while keeping within the safety and operational parameters.