New method for aircraft fuel saving using Flight Management System and its validation on the L-1011 aircraft

In order to reduce fuel savings in a given flight the vertical navigation profile in terms of speed and altitude that provides the most economical flight has to be found. An algorithm was developed using an aircraft performance database to determine the optimal vertical flight profile considering a take-off weight, flight distance, step climb and weather conditions. This algorithm is based on linear interpolations of the performance tables using the Lagrange method. The algorithm according to departure date and coordinates, download the latest available forecast from environment Canada website and calculate the optimal taking into account the effects of wind, pressure and temperature.