In flight mechanics, takeoff distance refers to the distance an aircraft requires to accelerate from a standstill on the runway, become airborne, and achieve a specified height above the ground during the takeoff phase of flight. It is a critical performance parameter that determines the minimum length of the runway needed for a safe takeoff.
s=s1+s2+s3
s = Total distance covered by the aircraft s1 = Distance covered during the first segment of the flight s2 = Distance covered during the second segment of the flight s3 = Distance covered during the third segment of the flight
The segments (s1, s2, and s3) can represent different phases of flight, such as taxiing on the ground (s1), takeoff and climb (s2), and cruise or descent (s3).