Aerodynamic Efficiency of Longitudinally Unstable Tailless Aircraft
Stefan RIETHAUSEN, David LUNDSTRÖM, Petter KRUS
Abstract. A tailless unmanned aerial vehicle (UAV) to measure the efficiency difference of stable and augmented unstable flight was developed, built and flown. An overview of the UAV and its systems is given along with the test flight procedure. The measurements are then compared between stable and augmented unstable configuration to draw conclusions.
Keywords
Tailless Aircraft, Stability Augmentation, Unmanned Aerial Vehicle, Aerodynamic Efficiency, Flight Testing
Published online 7/20/2026, 6 pages
Copyright © 2026 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Stefan RIETHAUSEN, David LUNDSTRÖM, Petter KRUS, Aerodynamic Efficiency of Longitudinally Unstable Tailless Aircraft, Materials Research Proceedings, Vol. 69, pp 475-480, 2026
DOI: https://doi.org/10.21741/9781644904251-86
The article was published as article 86 of the book CEAS – AIDAA Conference 2025
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
References
[1] Unstable Tailless Demonstrator, https://www.youtube.com/watch?v=JfKrUbJYk74, retrieved 2025.11.10
[2] S.J. Morris, Integrated Aerodynamics and Control System Design for Tailless Aircraft, AIAA Guidance, Navigation and Control Conference, Hilton Head Island, South Carolina, 1992, p. 4604. https://doi.org/10.2514/6.1992-4604
[3] I. L. Ashkenas, D. H. Klyde, Tailless aircraft performance improvements with relaxed static stability, NASA-CR-181806, 1989
[4] Reflex Airfoil Database, https://www.aerodesign.de/profile/profile_sp.htm, retrieved 2025.11.10
[5] UIUC Airfoil Database, https://m-selig.ae.illinois.edu/ads/coord\_database.html, retrieved 2025.11.10
[6] D. Lundström, K. Amadori, P. Krus, Validation of Models for Small Scale Electric Propulsion Systems, 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, 2010, p. 483. https://doi.org/10.2514/6.2010-483
