In flight mechanics, the “time taken in climb phase” refers to the duration or elapsed time required for an aircraft to ascend from a specific initial altitude to a designated higher altitude during the climb phase of the flight. The climb phase is a critical part of a flight, where the aircraft gains altitude and reaches its cruising or desired flight level.
t3 = screen height / (v2 * sin(γ))
Where: t3 = Time taken to reach the screen height screen height = The height or altitude at which the object needs to reach v2 = Vertical speed (rate of climb or descent) of the object γ = Climb angle or descent angle (flight path angle) of the object with respect to the horizontal plane