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Letters
Friday, January 5, 2007 12:00 AM

Ask the pilot

What does it take to make a plane fly? Can it take off from a conveyor belt? The pilot weighs in on an old brainteaser.
By Patrick Smith

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  • Thursday, January 4, 2007 09:04 PM

    Now a car, on the other hand...

    You could indeed create a treadmill that would keep a car in the same place. The car's thrust is applied through its tires. That's probably what people can't get past.

    —alden Read alden's other letters

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