Volume 3, 2012Progress in Flight Physics
|Page(s)||53 - 62|
|Section||Chapter One. Aerodynamics|
|Published online||29 January 2013|
Aircraft dynamic lateral stability analytic formulation for dutch roll mode stability prediction
AIRBUS, Route de bayonne 316, Toulouse 3100, France
Currently, the civil aircraft manufacturers during the development have strong will to relax the natural aircraft stability, in order to optimize mainly performances in term of fuel consumption, by reducing lifting control surfaces, which is not without consequences on aircraft stability. The study of new innovating configurations, as the flying wing aircraft with the engines in rear position, requires a deepening of the predictive methods of static and dynamic stability linked with the new aerodynamic aspects. On the topic of dynamic stability, the first presentation was made with conference EUCASS 2007 in Brussels. This presentation focused on the longitudinal aspect that highlighted new analytical expressions of the manoeuvre point, likely to improve the prediction of the dynamic margin at the stage of future project studies. In the same spirit, this paper describes a similar work that investigated the study of lateral dynamic stability. This work studied dynamic lateral stability according to the center of gravity location and allowed to determine on the Dutch roll damping curve a point beyond which the lateral model is instable. The first part of this study presents considerations on Dutch roll damping mode leading to analytic resolution. The second part will propose examples of this method applied to A/C design phase and perspectives of this method for new A/C concepts.
© Owned by the authors, published by EDP Sciences, 2012