ASCI 309 2

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Embry-Riddle Aeronautical University *

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ASCI 309

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English

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Feb 20, 2024

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docx

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ASCI 309 2.2 Assignment - Lifts and Airfoils From your reading, it should have become clear that the main determinant for all lift production of an aircraft is the airfoil shape utilized in the construction of the wing. Therefore, the first item to determine is what airfoil is used on your selected aircraft. For this initial task, you can use any reliable source of information you may have access to; nevertheless, one good such resource is provided online by David Lednicer's (2010)  Incomplete Guide to Airfoil Usage. Main Airfoil (for your selected aircraft) :  To find the main airfoil, go to the Online Tools section of the Field Exercises and Presentation page. This is found in the Course Specific Information section. It will send you to the websites you need to go to for research on your aircraft wing- Airfoil Tools and The Incomplete Guide to Airfoil Usage . (Notice that for a variety of aircraft, the root and the tip of the wing may have different airfoil profiles, in which case it makes sense to pick the root airfoil for all our considerations here.) Once you have determined the type of airfoil that is used on your example aircraft, the next logical step is to determine its particular lift production behavior (i.e., its lift curve). Again, there may be various sources available, but one good tool that can be utilized for this task is the Airfoil Tools database. Start the search for your particular airfoil either by entering its name into the text search or utilize the library links in the menu on the left. Search results will display below the search window and contain a link to further details on their right. (See picture below.) From the airfoil details view, you can gather the main properties (e.g., thickness, camber, etc.) of your selected airfoil profile. College of Aeronautics | worldwide.erau.edu All rights are reserved. The material contained herein is the copyright property of Embry-Riddle Aeronautical University, Daytona Beach, Florida, 32114. No part of this material may be reproduced, stored in a retrieval system or transmitted in any form, electronic, mechanical, photocopying, recording or otherwise without the prior written consent of the University .
To retrieve the specific lift production properties (i.e., the lift curve) of your airfoil, select the second from the bottom plot from the list of available plots (see picture). This plot will be for a Reynolds number Re = 10 6 , which is a good estimate for most of our small GA aircraft in this project (for more on selecting an appropriate  Re , see the discussion below). Once the correct plot is selected, use the "Update plots" button to create your lift curve. College of Aeronautics | worldwide.erau.edu All rights are reserved. The material contained herein is the copyright property of Embry-Riddle Aeronautical University, Daytona Beach, Florida, 32114. No part of this material may be reproduced, stored in a retrieval system or transmitted in any form, electronic, mechanical, photocopying, recording or otherwise without the prior written consent of the University .
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