Putting A New Spin On The Gyroscope

Gyroscopes have long been used in such navigational instruments as aircraft-and missile-guidance systems. But their cost, weight, and power consumption have limited their uses. Now, a Silicon Valley startup has developed what it says is the world's smallest and lightest gyroscope--about the size of a 35mm film cartridge and weighing only 2 ounces. Ordinary gyroscopes range in size from a soup can to a bread box and weigh from 1 to 35 pounds.

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