Calculating the Wing Lift Distribution with the Diederich Method in Microsoft Excel
Project
Autor: Suna Arslan
Date: 2023-04-13
Supervisor: Dieter Scholz
Abstract
Aim of this project is to provide the Diederich Method for calculating the lift distribution of a wing in a Microsoft Excel spreadsheet based on didactic considerations. The Diederich Method is described based on primary and secondary literature. Diagrams are digitized so that the method can run automatically. To optimize the lift distribution of the wing, the elliptical and triangular lift distribution as well as Mason's lift distribution are offered for comparison. A method for calculating the maximum lift coefficient of the wing is integrated into the Diederich Method. To do this, the maximum lift coefficients of the airfoils at the wing root and at the wing tip must be entered in the program. The calculation assumes a trapezoidal wing. Both wing sweep and linear wing twist can be taken into account. The aspect ratio must not assume values that are too small. Subsonic flow and unseparated flow are assumed. Since only the wing is described, all other influences such as from the fuselage or from the engines are not taken into account. The Excel workbook was created for teaching in aircraft preliminary design. At the moment, the Diederich Method is apparently nowhere offered as a spreadsheet. With this work, this gap can be closed.
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TextArslan.pdf
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URN, the Persistent Identifier (from the German National Library) to quote this Landing Page:
https://nbn-resolving.org/urn:nbn:de:gbv:18302-aero2023-04-13.012 
Entries into
- the German National Library (https://www.dnb.de),
- the Repository of Leibniz University Hannover (https://www.repo.uni-hannover.de) for the DOI,
- and the Internet Archive
will come later.
The original text in German
https://nbn-resolving.org/urn:nbn:de:gbv:18302-aero2021-03-30.017
The project page
http://diederich.ProfScholz.de
Associated research data: https://doi.org/10.7910/DVN/UK2SIV
User interface of the Excel workbook (upper part)
LAST UPDATE: 05 November 2023
AUTHOR: Prof. Dr. Scholz
IMPRESSUM (PDF)
Prof. Dr. Scholz
Aircraft Design and Systems Group (AERO)
Aeronautical Engineering
Department of Automotive and Aeronautical Engineering
Faculty of Engineering and Computer Science
Hamburg University of Applied Sciences