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Preliminary investigation of use of flexible folding wing tips for static and dynamic load alleviation

Research output: Contribution to journalArticle

  • Andrea Castrichini
  • Vijaya Hodigere Siddaramaiah
  • Dario Calderon
  • Jonathan Cooper
  • T Wilson
  • Y Lemmens
Original languageEnglish
Pages (from-to)73-94
Number of pages23
JournalAeronautical Journal
Issue number1235
Early online date21 Nov 2016
DateAccepted/In press - 9 Sep 2016
DateE-pub ahead of print - 21 Nov 2016
DatePublished (current) - Jan 2017


A recent consideration in aircraft design is the use of folding wing-tips with the aim of enabling higher aspect ratio aircraft with less induced drag, but also meeting airport gate limitations. This study investigates the effect of exploiting folding wing-tips in-flight, as device to reduce both static and dynamic loads. A representative civil jet aircraft aeroelastic model was used to explore the effect of introducing a wing-tip device, connected to the wings with an elastic hinge, on the loads behavior. For the dynamic cases, vertical discrete gusts and continuous turbulence were considered. The effect of hinge orientation, stiffness, damping and wing-tip weight on the static and dynamic response was investigated. It was found that significant reductions in both the static and dynamic loads were possible. For the case considered, a 25% increase in span using folding wing-tips resulted in almost no increase in loads.

    Research areas

  • Aeroelasticity, Aircraft design, Gust, load alleviation, Folding wing-tip

    Structured keywords


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    Rights statement: This is the author accepted manuscript (AAM). The final published version (version of record) is available online via Cambridge Unversity Press at Please refer to any applicable terms of use of the publisher.

    Accepted author manuscript, 1.86 MB, PDF document


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