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# Buoyancy and resistance on the wing profile

The following animation illustrates the principle of dynamic buoyancy.

Note: You can enlarge or reduce the four sections by using your mouse.

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

After the download, the animation can be shown in full screen mode. Integration into PowerPoint is also possible.

## Description

The animation contains four segments with the following content:

Top left A wing profile (Clark-Y) showing the buoyancy, resistance and total force. In addition, it depicts the force of the weight. Diagram showing the buoyancy and resistance coefficient in dependency to the setting angle. Formulas for the calculation of the buoyancy and resistance force Polar diagram as a representation of the buoyancy coefficient in dependency to the resistance coefficient.

The animation demonstrates that even with a flat angle of 0 degrees a high buoyancy still occurs. This fact cannot 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). Actually is the resistance smaller than in the animation. To illustrate the resistance better and make it more apparent, it was multiplied by a factor of 10.

## General information

Title: Buoyancy and resistance on the wing profile Teachers and lecturersIndependent learners Microsoft® Windows®Microsoft® PowerPoint®Apple® Macintosh® Resizable without the loss of visual clarityNo installation required Licensing Information About Flash Player security

## Sources

• Idea and initial concept: Tamara Riehle
• Idea and initial concept: Tamara Riehle

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