DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Aeroelastic mysteries in avian flight

Försching, Hans and Hennings, Holger (2012) Aeroelastic mysteries in avian flight. CEAS Aeronautical Journal (13272), pp. 135-143. Springer. DOI: 10.1007/s13272-012-0048-6 ISSN 1869-5582 (print version) / 1869-5590 (electronic version)

Full text not available from this repository.


Avian flight is one of the remarkable achievements of vertebrate evolution. Thereby, the birds encountered, in principle, the same flight-technical problems and challenges as the human aircraft designers. From an aeronautical point of view, and with the knowledge and experience of modern aircraft design, the present study demonstrates that concealed aeroelastic effects and phenomena are also of basic importance in avian flight. Structural wing asymmetries play a fundamental role. First, as basis for the aeroelastic investigations, significant flight relevant anatomical and structural characteristics of the complex biotechnical architecture of avian wings are exposed. The further considerations are then focussed on two conspicuous asymmetric structural particularities of the wing, which contribute essentially to active flight ability of birds—an asymmetric positioning of the shaft in the vane of the primary flight feathers, and just so the eccentric location of the bony skeleton in the wing profile close to the leading edge. Ornithologists consider the asymmetry of the flight feathers as a diagnostic tool for aerial capability. However, this thesis still remains a topic of controversial debates. The study shows evidently that the magic structural wing asymmetries are imperative aeroelastic requirements for efficient flight, in particular to ensure structural strength and stability of the wing, as well as aerodynamic integrity. But these asymmetries are also fundamental to active aerodynamic generation of lift and thrust in wing flapping.

Item URL in elib:https://elib.dlr.de/79958/
Document Type:Article
Title:Aeroelastic mysteries in avian flight
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hennings, Holgerholger.hennings (at) dlr.deUNSPECIFIED
Date:2 November 2012
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :10.1007/s13272-012-0048-6
Page Range:pp. 135-143
ISSN:1869-5582 (print version) / 1869-5590 (electronic version)
Keywords:avian flight, structural wing asymmetries, aeroelastic phenomena
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: Erdmann, Daniela
Deposited On:19 Dec 2012 17:24
Last Modified:06 Sep 2019 15:24

Repository Staff Only: item control page

Help & Contact
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.