Surprisingly, in the eighteenth century, horologists were already using air friction to regulate the speed of minute repeaters.

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Taking this traditional idea of using air friction and refining it to control the speed of automatic winding, Urwerk has replaced the traditional rotating mechanisms of the past with miniature twin turbines that can be seen spinning on the back of the watch and are connected to the rotor.

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Traveling through the sky at a few kilometers per second, friction with the air can cause the meteor to break up into several pieces.

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The heat from the friction of its descent into the denser air can ignite the dust and debris in a display of astronomical fireworks.

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He had complained frequently that the Air Force was not getting ground forces the reconnaissance support they needed in overseas conflicts, and there was continuous friction over modernization priorities (Gates eventually terminated a fighter program championed by the purged Air Force leaders).

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And, as well as all the environmental benefits of eliminating paint, the film-coating has the added advantage that it can save fuel by reducing the friction between the aircraft's skin and the air.

ECONOMIST: It’s a wrap | The

After turning off the jet and rocket he will deploy an air brake at 800mph, parachutes at 600mph and finally put his foot on a car-type friction brake at 250mph any faster and the brakes could explode.

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