Aerodynamic investigation on the artefact “bird of Saqqara”

• Autorzy: Zierow Michel , Lesemann Leon

Identyfikatory

DOI

10.2478/ama-2023-0046

• Języki publikacji: EN

Abstrakty

EN

Lost, technical knowledge of ancient cultures is being rediscovered in modern times during archaeological excavations. A presumed example of the innovative power of ancient cultures is the artefact “Bird of Saqqara”. In the context of this paper, the aerodynamic characteristics of the artefact are to be determined by a computational fluid simulation, in order to be able to make a statement about the actual flight suitability and to examine the theses of the pre-astronautics critically. Based on a 3D scan, a CAD model of the artefact is created and then a numerical flow simulation is performed. By varying the angle of attack, the dimensionless coefficients can be represented in corresponding polars. The results show that the artefact has a low maximum glide ratio and thus the glide properties are not sufficient for use as a handglider. The centre of gravity of the artefact is located at the trailing edge of the wing and behind the neutral point. The resulting longitudinal stability does not meet modern specifications. Asymmetric lift distribution in the spanwise direction results in uncontrolled roll. Consequently, the artefact cannot fly a straight path. Within the scope of this work, the connection between the “Bird of Saqqara” and an alleged knowledge of aerodynamics in ancient Egypt could not be confirmed.

Słowa kluczowe

EN

Saqqara; bird; aerodynamics; archaeology; CFD; flight mechanics; Paleo-SETI; Egypt; Ancient Aliens

• Wydawca: Oficyna Wydawnicza Politechniki Białostockiej
• Czasopismo: Acta Mechanica et Automatica
• Rocznik: 2023
• Tom: Vol. 17, no. 3
• Strony: 405--409
• Opis fizyczny: Bibliogr. 6 poz., rys., tab., wykr.

Twórcy

autor

Zierow Michel

• City University of Applied Sciences, Faculty of Nature and Engineering, Institute of Aerospace Technology, Flughafenallee 10, 28199 Bremen, Germany

• https://orcid.org/0000-0001-8724-972X

autor

Lesemann Leon

• City University of Applied Sciences, Faculty of Nature and Engineering, Institute of Aerospace Technology, Flughafenallee 10, 28199 Bremen, Germany

• https://orcid.org/0000-0002-2119-3134

Bibliografia

• 1. Messiha K. African Experimental Aeronautics: A 2,000-Year-old model glider. Blacks in Science - Ancient and Modern. Ivan Van Sertima. 1991;92-97.
• 2. Schwarze R. CFD-Modellierung - Grundlagen und Anwendungen bei. Berlin Heidelberg New York. Springer-Verlag. 2012.
• 3. Abbott IH. Theory of Wing Sections. New York. Dover Publ. 1959.
• 4. Raymer DP. Aircraft Design - A Conceptual Approach. Stanford. Stanford University. American Institute of Aeronautics und Astronautics. 1989.
• 5. Sachs X, Hafer G. Flugmechanik - Moderne Flugzeugentwurfsund Steuerungskonzepte. Berlin Heidelberg New York. Springer-Verlag. 1993.
• 6. Hünecke K. Die Technik des modernen Verkehrsflugzeuges. Stuttgart. Motorbuch Verlag. 2017.

Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).