In this lecture Dr. Ir. M. Voskuijl starts with a recap of the previous lecture, and finishes where had had left off talking about turning performance, advanced manoeuvres and altitude effects. Continuing with the actual topic of the lecture, the takeoff performance of aircraft is discussed and the equations of motions are derived. Next the takeoff distance of aircraft is derived from these equations of motion, resulting is certain critical parameters such as the decision speed, rotation speed and safety speed. Finally the effect of the environment on a takeoff is discussed.