Open AccessEmulation of Radius-to-Fix legs in Departure Routes via Fly-By Turns
Author(s) -
Carlos Gonzaga-López,
Florian Michael Buchmann,
Henrik Ekstrand,
Andreas Linnér,
Philipp Daniel Schaad
Publication year - 2019
Publication title -
incas buletin
Language(s) - English
Resource type - Journals
eISSN - 2247-4528
pISSN - 2066-8201
DOI - 10.13111/2066-8201.2019.11.4.9
Subject(s) - emulation , track (disk drive) , radius , turning radius , range (aeronautics) , simulation , takeoff , aeronautics , aerospace engineering , computer science , path (computing) , flight test , engineering , computer security , economics , programming language , economic growth , operating system
The results of a preliminary study on the emulation of radius-to-fix legs in turning departures by means of standard track-to-fix legs are presented in this technical note. While radius-to-fix equipage rates keep gradually increasing over time, a traffic mix containing aircraft with and without this navigation capability can impede an optimal management of the traffic flows whenever precise and repeatable curved flight paths are required. After test-flying various sequences of track-to-fix segments to emulate a reference constant-radius arc in a typical departure environment, the deviations to the desired flight path and the flyability aspects were assessed. The first results for a given scenario and aircraft type show an adequate path conformance for a navigation specification RNAV/RNP 1 within a certain range of aircraft performances and weather conditions. However, the reduced predictability of the roll steering when transitioning between track-to-fix segments and the high frequency in the oscillations of the bank angle may pose a problem to flight crews and passengers, respectively.