Patent ID: 7139645

Claim:
A process for aiding the driving of an aircraft running over a runway in an acceleration phase with a view to takeoff, which allows the pilot to ascertain up to what moment the takeoff can be interrupted without risk of overshooting the end of the runway, wherein the following successive operations are carried out repetitively: a) determining a current speed v 0 of the aircraft and a value acc corresponding to a deceleration of said aircraft, wherein said value acc is a predetermined deceleration value which corresponds to the deceleration undergone by the aircraft during emergency braking; b) with the aid of the values v 0 and acc, calculating a distance df to be traveled on the ground by the aircraft in order to stop, using the following expression: df =( v 0) 2 /2 acc and calculating a stopping position of the aircraft from said distance df and a current position of said aircraft; and c) presenting the distance df and the stopping position to a driver of the aircraft with the aid of a heads-up display, wherein: the heads-up display displays a symbol on the windscreen of the aircraft such that the symbol is visually projected at the calculated stopping position of the aircraft in the pilot's view of the runway and of its end for use by the pilot to determine up to what moment the takeoff may be interrupted without risk of overshooting the runway.