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Rocket power is old hat A BIZARRE kind of propulsion system, based on thousands of flying ball bearings, has been proposed as a means of manoeuvring satellites or sending space probes to distant planets. It works like this: an orbiting base fires ball bearings at the payload from an electromagnetic centrifuge. A second centrifuge on the payload receives the ball bearings and throws them back again. They transfer momentum to the payload and increase its velocity through space. Top of page | Home Page | News | BT Money | Survey | Companies | People | Appointments | World | Markets | Trends | Columns | News Maker | Money Guides | Labour Guides | Calculators | Search | Archive | E-Mail us |