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Reduction of Vertical Tail Using Differential Thrust: Influence on Flight Control and Certification

Nguyen Van, Eric and Troillard, Pierre and Jezegou, Joël and Alazard, Daniel and Pastor, Philippe and Döll, Carsten Reduction of Vertical Tail Using Differential Thrust: Influence on Flight Control and Certification. (2018) In: Advanced Aircraft Efficiency in a Global Air Transport System (AEGATS'18), 23 October 2018 - 25 October 2018 (Toulouse, France).

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Abstract

The flight control characteristics and certification compliance of a Distributed Electric Propulsion (DEP) aircraft using differential thrust is studied through exploration of flight envelops. Identification of critical flight phases specific to the use of propulsion systems as actuators for flight control is performed. In particular the influence of engine failures on the flight envelop and means of mitigation are given. It is concluded that an aircraft using differential thrust has a most advantageous flight envelop at the point of neutral directional static stability allowing a reduction of 45% of the vertical tail surface area. Additionally, the directional control could be entirely provided by differential thrust, eliminating the need for a rudder. Study of this type of aircraft showed specific failure modes that differ from the actual certification prescriptions. New more relevant definitions and parameters are proposed as basis to demonstrate compliance with high level certification objectives.

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference without published proceedings
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
French research institutions > Office National d'Etudes et Recherches Aérospatiales - ONERA (FRANCE)
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Deposited By: Eric Nguyen Van
Deposited On:09 Apr 2019 14:01

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