What is a recommended procedure for taking off in wind shear?

Using the longest runway and increasing the rotation speed by up to 10 knots during takeoff in wind shear conditions is a recommended procedure because it optimizes safety and performance in an environment where wind conditions can change drastically and suddenly.

Wind shear can create turbulence and varying airspeeds that affect the aircraft's lift and stability during takeoff. Employing the longest runway provides additional distance for the aircraft to accelerate to a safer speed, allowing for better handling and control, especially when encountering unexpected changes in wind velocity. Increasing the rotation speed helps ensure that the aircraft achieves adequate lift more rapidly, thereby reducing the risk of stalling or losing control if wind shear affects the lift during the critical takeoff phase.

Adhering to this procedure helps to account for the dynamic nature of wind shear and enhances the aircraft's performance margins during the early stages of flight, contributing to a safer takeoff experience.