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Buoyancy and resistance on the wing profile

The following animation illustrates the principle of dynamic buoyancy.

Note: You can enlarge and reduce the four areas by mouse click.

The animation was developed as a offline application for Windows and Macintosh systems and for integration into Microsoft PowerPoint slides. The online version presented here serves as a preview. The exe or app file can be downloaded free of charge in the member area.

Vollbild

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Nach dem Download kann die Animation im Vollbildmodus angezeigt werden. Auch die Einbindung in PowerPoint ist möglich.

Description

The animation contains four areas with the following content:

Top leftA wing profile (Clark-Y) showing the buoyancy, resistance and total force. In addition, the weight force is shown.
Top rightDiagram showing the buoyancy and resistance coefficient as a function of the angle of attack
Bottom leftFormulas for the calculation of the buoyancy and resistance force
Bottom rightPolardial diagram for the representation of the buoyancy coefficient as a function of the resistance coefficient

The animation makes it clear that even with an blade angle of 0 degrees still a buoyancy occurs. This fact can not be explained mechanically (Bernoulli principle).

The animation is based on measured values that have been determined in a wind tunnel with a Clark-Y profile (see source information). The resistance was smaller than in the animation. In order to make the resistance more apparent, it was multiplied by a factor of 10.

General

Title:Buoyancy and resistance on the wing profile
Target group:
  • Teachers and lecturers
  • Self-learners
Platforms (primary):
  • Microsoft® Windows®
  • Microsoft® PowerPoint®
  • Apple® Macintosh®
Features
  • Enlargeable without loss
  • No installation required
DocumentsLicense Information
About the security of the Flash Player

Sources

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