Next Article in Journal
Effect of Local Grid Refinement on Performance of Scale-Resolving Models for Simulation of Complex External Flows
Previous Article in Journal
Special Issue “8th EASN–CEAS Workshop on Manufacturing for Growth and Innovation”
Open AccessArticle

Investigation of a Morphing Wing Capable of Airfoil and Span Adjustment Using a Retractable Folding Mechanism

Faculty of Aerospace Engineering, Technion, Israel Institute of Technology, Haifa 32000, Israel
Author to whom correspondence should be addressed.
Aerospace 2019, 6(8), 85;
Received: 18 January 2019 / Revised: 23 July 2019 / Accepted: 24 July 2019 / Published: 31 July 2019
The presented aircraft is capable of alternating between two singular working points by folding the exterior surfaces of the wing underneath the interior surfaces. This allows for a significant change in wingspan, lift surfaces, aspect ratio and airfoil (camber and thickness). The motivation for this type of morphing is twofold: The increase in wingspan due to unfolding, results in an increased endurance of the aircraft, while the opposite process, which eliminates the camber of the airfoil and reduces the moment of inertia, is translated into improved manoeuvre capabilities. An analysis was performed to assess the additional endurance gained by the morphing capabilities, factoring in a spectrum of aircraft geometries and flight missions. It was concluded that this morphing concept can, in theory, improve the endurance up to 50% compared to the standard counterparts. The penalty due to the additional weight of the morphing mechanism was factored in, which had an adverse effect on the endurance improvement. The concept also calls for unique airfoil selection process. Selecting a proper airfoil for either working point, results in irregular airfoil geometry upon morphing. The two possibilities were subjected to analysis and wind tunnel testing. View Full-Text
Keywords: morphing; adaptive; folding; performance; wind tunnel test morphing; adaptive; folding; performance; wind tunnel test
Show Figures

Figure 1

MDPI and ACS Style

Geva, A.; Abramovich, H.; Arieli, R. Investigation of a Morphing Wing Capable of Airfoil and Span Adjustment Using a Retractable Folding Mechanism. Aerospace 2019, 6, 85.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop