DLR Tests Flexible And Actively Controlled Wing Designs | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

Airborne Unlimited -- Recent Daily Episodes

Episode Date

Airborne Unlimited-

Airborne-Unmanned w/AUVSI-

Airborne Unlimited-

AMA Drone Report-

Airborne Unlimited-

Airborne On ANN

Airborne Unlimited-07.15.19

Airborne UnManned-07.16.19

Airborne Unlimited-07.17.19

AMA Drone Report-07.18.19

Airborne Unlimited-07.19.19


Airborne Unlimited-07.15.19

Airborne UnManned-07.16.19

Airborne Unlimited-07.17.19

AMA Drone Report-07.18.19

Airborne Unlimited-07.19.19

Fri, Jul 12, 2019

DLR Tests Flexible And Actively Controlled Wing Designs

Innovative Wings For More Fuel-Efficient Aircraft

Future aircraft need to be lighter to help them be more fuel-efficient. For this reason, the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt; DLR) in Göttingen has tested two wing designs as part of an EU project. These types of wings have been impossible to manufacture until now.

Alongside more fuel-efficient engines and higher-aspect-ratio wings, weight reduction is regarded as the most important way to reduce fuel consumption in the air transport sector. In the case of aircraft wings, the possibilities for reducing weight while using conventional manufacturing techniques have been almost fully exploited. Since aircraft wings have to withstand high loads, they are built to be particularly mechanically stable. In the past, they were made of the lightweight metal aluminium; today, they are increasingly being manufactured using carbon-fiber reinforced composites. The EU FLEXOP project, in which research institutions from six nations have joined forces, has set itself the goal of investigating new possibilities in wing design. The researchers designed two different variants that promise weight reduction and built them together with a standard wing to use for comparison purposes. In order to investigate the effectiveness of the new wing designs, they have now been tested in what are referred to as ground vibration tests at the DLR Institute of Aeroelasticity in Göttingen.

The standard wing model was made using carbon-fiber reinforced composites and is based on the wing of a conventional commercial aircraft. The first innovative wing design is the 'flutter wing', designed by the Technical University of Munich. This wing is made of glass-fiber reinforced composites and is deliberately designed in such a way that it can enter the dangerous state of 'fluttering'. During aerodynamic flutter, in a behaviour similar to a flag flying in the wind, the oscillations caused by the airflow over the wing become stronger and stronger until a mechanical failure occurs. An innovative flight control system developed and designed by the DLR Institute of System Dynamics and Control in Oberpfaffenhofen is to prevent such a critical condition from occurring. The outermost flaps on the trailing edge of the wing are controlled in such a way that they act as dampers. This allows the wing to be much lighter and to have a higher aspect ratio. "Active control significantly increases the possibilities for a much lighter design," says Gertjan Looye, coordinator of DLR's involvement in the project. A second flight control system is being developed by the Hungarian Academy of Sciences Institute of Computer Science and Control (MTA SZTAKI).  

"Such a wing could make it possible to transport 20 percent more freight or use seven percent less fuel," said Project Manager Bálint Vanek of MTA SZTAKI.

The other wing design under test, the 'aeroelastic wing', was developed by the DLR Institute of Aeroelasticity together with the University of Delft. Although it is also constructed using carbon-fiber reinforced composites, it has special properties. "Under load, the new wing not only bends, it also twists much more extensively than today’s wings," says Yves Govers, DLR's Test Manager in Göttingen. As a result, the aeroelastic wing is able to avoid being subjected to the heaviest loads in flight and is as stable as the standard wing – although it is 20 percent lighter. This is made possible by a specially optimized and unconventional layer structure in the materials from which it is manufactured.

Ground vibration tests are an important part of the test program for aircraft prototypes. For each new aircraft type, its flutter safety must be proven. The DLR Institute of Aeroelasticity is a leader in the field of ground vibration tests and has already measured the vibration characteristics of prototypes of large commercial aircraft such as the Airbus A380, the Airbus A350 and, most recently, the Beluga XL.

In the second half of 2019, the wing models will also be flight tested in Oberpfaffenhofen.

The partners in the EU FLEXOP project are: the Hungarian Academy of Sciences Institute of Computer Science and Control (Magyar Tudományos Akadémia Számítástechnikai és Automatizálási Kutatóintézet; SZTAKI); Airbus Defence and Space GmbH, Airbus Group Innovations; Airbus Group Ltd; FACC Operations GmbH; Integrated Aerospace Sciences Corporation (INASCO); Technische Universiteit Delft (Delft University of Technology); Technische Universität München (Technical University of Munich); University of Bristol and the Rheinisch-Westfälische Technische Hochschule Aachen (RWTH Aachen University).

(Image provided with DLR news release)

FMI: www.dlr.de


More News

Garmin TeamX Brings New Features To The G5, G3X Touch

Updates Instruments For Both Experimental And Certified Aircraft Garmin has added new features and enhancements to the G5 electronic flight instrument for certified and experimenta>[...]

Pipistrel Aircraft 'Electri-Flies' Oshkosh -- Again!!!

Pipistrel Is Displaying Their Extensive Aircraft Line... Including Production Electric Training Aircraft International aircraft designers and manufacturer Pipistrel, is set to (onc>[...]

It's On--Again! EAA/ANN Announce 2019 AirVenture Innovation Preview!

Get The Inside Details On THE Most Exciting NEW Innovations And Product Announcements From OSHKOSH 2019... The staff of EAA and the Aero-News Network were pleased to release the la>[...]

DeltaHawk Provides Powerful Special Event Coverage From AirVenture 2019!

DeltaHawk Readies for Oshkosh 2019 and the Start Of Engine Production! It’s the start of an incredible new era at DeltaHawk Engines. We’ve reimagined powerful jet fuel >[...]

Waco Classic Aircraft Brings You Oshkosh 2019... By Land, Sea, and Air!

Waco, Great Lakes... Two Amazing Classic Biplanes Made by THE Classic Biplane Experts! WACO Classic Aircraft of Battle Creek, MI, is the world's only manufacturer of a brand new 19>[...]

blog comments powered by Disqus





© 2007 - 2019 Web Development & Design by Pauli Systems, LC