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Aeroelasticity in Sailplane Design

Schwochow, Jan (2004) Aeroelasticity in Sailplane Design. Motorless Flight Symposium, 08.-10. October 2004, Varese. (Unpublished)

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One of many problems in the field of sailplane design is that of aeroelastic stability. Practicing designers of gliders and light aircraft seldom have the opportunity to spend a great deal of time studying the difficult background of flutter. Therefore, the flutter engineers at the Institute of Aeroelasticity are traditionally consulted to test and to certify light aircrafts and gliders for flutter stability. In the following the basics for the mechanism of flutter are presented and the certification process is explained for a representative modern sailplane of the 18m-class starting with the requirements of the Joint Aviation Authorities (JAA). The objectives and methods of the ground vibration test are introduced to measure the vibration properties of the aircraft structure. These data are used to perform the flutter analysis in order to find possible flutter instabilities in the flight envelope. As the maximum flight speed of modern high performance sailplanes is further increased, costly modifications of the prototype are often necessary to satisfy a safe design. Therefore, a method is presented to estimate the flutter behavior during the design process.

Item URL in elib:https://elib.dlr.de/84246/
Document Type:Conference or Workshop Item (Speech)
Title:Aeroelasticity in Sailplane Design
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:8 October 2004
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:flutter ground vibration test
Event Title:Motorless Flight Symposium
Event Location:Varese
Event Type:international Conference
Event Dates:08.-10. October 2004
Organizer:Associazione Italiana di Aeronautica e Astronautica
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 - Flexible Aircraft (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Simulations
Deposited By: Schwochow, Jan
Deposited On:25 Sep 2013 11:23
Last Modified:25 Sep 2013 11:38

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