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Archive for the ‘Linear Motor’ tag

May 23, 2014

The Navy’s Rail Gun Hides a Secret

Posted by in categories: business, counterterrorism, defense, disruptive technology, engineering, innovation, physics, science, space

The Navy’s Rail Gun technology hides a secret, that the Navy’s projectile accuracy has been substantially increased by about 45x.
But first some history.

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Sep 22, 2012

Debunking Laithwaite’s Critics

Posted by in category: physics

Pervious blog post in this debunking series

Recently I had an interesting discussion about Laithwaite’s Big Wheel demonstration.

Note that the late Professor Eric Laithwaite was Professor of Heavy Electrical Engineering at Imperial College, and inventor of the linear motor, and the maglev train technology which Germany and China have taken the lead. The poor Brits they missed out on their own invention.

The Big Wheel experiment is basically this. Attach a wheel to the end of a 3-ft (1 m) rod. Spin this wheel to 3,000 rpm or more. Then rotate this rod with the spinning wheel at the other end. The technical description is, rotate the spin vector.

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