Longitudinal static stability requirements for wing in ground effect vehicle

• Main Authors: Wei Yang, Zhigang Yang, Maurizio Collu
• Format: Article
• Language: English
• Published: Elsevier 2015-03-01
• Series: International Journal of Naval Architecture and Ocean Engineering
• Subjects: Ground effect; Longitudinal stability; Aerodynamics; Hydrodynamics; Hydrofoil; Vehicle dynamics
• Online Access: http://www.sciencedirect.com/science/article/pii/S2092678216300784

The issue of the longitudinal stability of a WIG vehicle has been a very critical design factor since the first experimental WIG vehicle has been built. A series of studies had been performed and focused on the longitudinal stability analysis. However, most studies focused on the longitudinal stability of WIG vehicle in cruise phase, and less is available on the longitudinal static stability requirement of WIG vehicle when hydrodynamics are considered: WIG vehicle usually take off from water. The present work focuses on stability requirement for longitudinal motion from taking off to landing. The model of dynamics for a WIG vehicle was developed taking into account the aerodynamic, hydrostatic and hydrodynamic forces, and then was analyzed. Following with the longitudinal static stability analysis, effect of hydrofoil was discussed. Locations of CG, aerodynamic center in pitch, aerodynamic center in height and hydrodynamic center in heave were illustrated for a stabilized WIG vehicle. The present work will further improve the longitudinal static stability theory for WIG vehicle.