Stability and Control of Ground Effect Aircraft in Longitudinal Motion (Flugeigenschaften in der Laengsbewegung von Bodeneffekt-Fluggeraeten),
Abstract
Following experimental demonstration of the feasibility of ground effect aircraft (GEA's) interests has increased in their economic aspects. The stability and control characteristics of such vehicles near ground were subject to detailed investigations in order to provide design guidelines. For longitudinal motion, it could be shown that when a GEA approaches the ground, a short-period rotation (alpha-mode) and a vertical translation (B-mode) result from the known modes of the free space; these are sufficiently stable in the case of an appropriate design of such flying machines. The B-mode is particularly important for safe flight near ground. That mode is governed by a new stability measure, the so-called static altitude stability, which becomes evident by an appropriate formulation of the general static stability of the free space. The effects of design parameters, state variables, and aerodynamic derivatives on longitudinal stability near ground are discussed by means of analytical approximations and numerical calculations. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1977
- Accession Number
- ADA042005
Entities
People
- Bao-tzang Yeh
- David W Taylor
- Rolf Staufenbiel