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schéma de principe du ballon The mathematical model of the solar balloon is based on 2 characteristics :
· the top is an half sphere diameter D.
· the bottom is a cone.
The semi angle of the cone is around 40°.
It can be changed . If the angle is increased , the load on balloon bottom will increase...
Those angles should be expressed in radians in order to use the Excel 97's trigonometric functions.
360° = 2 X Pi radians.
Many characteristics can be modified in the modified in the xls files.


Solar balloon Formulas


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