Aeronautics Notes, Jun. 6, 1927

"Outside Loop." Imagine sitting upright on top of an enormous flywheel, 2,000 feet in diameter. You are strapped to its outer rim. The wheel is in motion, whirling you forward and downward at a speed which increases from 150 miles per hour to 280 miles per hour when you are upside down, beneath it. Then you are carried upward to your original position and are safe, for this wheel will not torture you with another revolution.

Lieut. James ("Lucky Jimmy ) Doolittle performed a similar revolution in his...

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