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UAS Airframe Design
Published in R. Kurt Barnhart, Douglas M. Marshall, Eric J. Shappee, Introduction to Unmanned Aircraft Systems, 2021
Michael T. Most, Michael Stroup
The purpose of the tail is to provide stability and the control moments needed to trim and maneuver the aircraft. Control (or maneuverability) and stability are antithetical design considerations, increasing one diminishes the other. To illustrate this point, it might be mentioned, parenthetically, that with the introduction of computer-assisted fly-by-wire systems, it became possible to destabilize fighter designs (i.e., to introduce negative static stability into the aircraft) to make them more maneuverable and reduce supersonic trim drag. The General Dynamics F-16 was the first aircraft intentionally designed to incorporate a slight aerodynamic instability, which is known as relaxed static stability (rss) (Figure 10.4).
UAS Airframe and Powerplant Design
Published in Douglas M. Marshall, R. Kurt Barnhart, Eric Shappee, Michael Most, Introduction to Unmanned Aircraft Systems, 2016
The purpose of the tail is to provide stability and the control moments needed to trim and maneuver the aircraft. Control (or maneuverability) and stability are antithetical design considerations—increasing one diminishes the other. To illustrate this point, it might be mentioned, parenthetically, that with the introduction of computer assisted fly-by-wire systems, it became possible to destabilize fighter designs (i.e., to introduce negative static stability into the aircraft) to make them more maneuverable. The General Dynamics F-16 was the first aircraft intentionally designed to incorporate a slight aerodynamic instability, known as relaxed static stability, or rss (Figure 10.3).
Canard Airplanes and Biplanes
Published in James DeLaurier, Aircraft Design Concepts, 2022
Canard airplanes are configured to have their horizontal tail forward of the wing, as shown in the picture of the 1908 Wright Model A. The horizontal tail itself is referred to as the “canard”. Such configurations have existed throughout the history of aviation, and designers have had various motivations for using these. In the Wrights’ case, they wanted the canard to provide protection in case of a crash (a “bumper”).
Real-Time Vision-Based Aircraft Vertical Tail Damage Detection and Parameter Estimation
Published in IETE Journal of Research, 2022
Kishan S. Chowhan, Hemendra Arya, Vijay V. Patel, Girish S. Deodhare
The physical implementation methods and real-time use were discussed and demonstrated for damage to the vertical tail of a fighter aircraft. It is noted that with an increase in damage to the vertical tail, i.e. from 25 to 75%, there is a reduction in directional stability. Though there is a reduction in directional stability, the aircraft can be made controllable by just increasing the Cnbeta gain. Overall damage to the vertical tail can result in degradation in stability and control of aircraft, which may in turn result in poor directional handling qualities, i.e. inability to maintain heading and large sideslip excursions. However, since the vertical tail is on the centerline of the aircraft, asymmetry complications induced due to damage will be quite minimal. However, the same may not be true in the case of wing damage, which may need to be augmented with a separate robust or nonlinear control strategy for reconfiguration, which can be looked upon as future scope of the work.
Optimal Wing and Horizontal Tail Plane Design for Maximizing the Aircraft Performance in Cruise Flight
Published in Cybernetics and Systems, 2023
Rubén Ferrero-Guillén, Javier Díez-González, José Manuel Alija, Alberto Martínez-Gutiérrez, Paula Verde, Hilde Perez
The HTP and Vertical-Tail-Plane (VTP) are, beside the wings, the main lifting surfaces of every aircraft. However, the primary function of these devices differs from that of the wing. While the wing is designed to produce the lift force that pushes the aircraft upwards, the main function of the tail is to provide trim, stability and direction control.