Tangential entries cause the warm moist air to spin as it rises forming an anchored convective vortex.

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Any breeze would spin the trubine and draw air out of the natural cave and through the house.

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All that was needed to make a mechanical energy-storage system was a good enough rotational seal, so the flywheel could spin freely inside a vacuum chamber with no air resistance.

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Spin in the storm's updraft is enhanced when the air entering the base of the updraft is from the south, while the winds further aloft are flowing from west to east.

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There are so few air particles to create drag that a slow rotation can quickly accelerate into an uncontrollable spin.

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