In flight mechanics, takeoff parameter is a term used to describe the factors that affect the takeoff of an aircraft. The takeoff parameter consists of three important factors: thrust, weight, and wing area1. The takeoff distance consists of two parts, the ground run, and the distance from where the vehicle leaves the ground to until it reaches 50 ft (or 15 m). The sum of these two distances is considered the takeoff distance2.
where,
(W/S) T0 = wing loading based on take-off weight.
(T/W) T0=Thrust loading in takeoff
σ = density ratio = ρ/ρ0
CLT0 = Lift coefficient in takeoff configuration (about 80% of CLmax in landing
configuration)