Sketch of the Tupelo Storm Shelters
A sketch of the storm shelter design in Tupelo, Mississippi, shows the elliptical stem wall and elliptical dome inflated on top. Note how the overall prolate shape extends below the dome. Try this shape on the MDI Horizontal Ellipsoid Calculator
Image by Dave South
Sourced from Monolithic Commons
Posted to Hard Math, Made Easy, When Calculating a Horizontal Ellipsoid
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Image by Dave South from Monolithic Commons via Monolithic Dome Institute (CC BY-SA 4.0)