Science: Pilot's Helper

When a single-engine airplane loses its power, the pilot has always had a problem. Unless he bails out and abandons his air, he must search for an emergency anding place. This is a perilous business, but until the development of modern jet planes, the pilot at least retained control.

The pilot of a jet plane lacks this advantage. Jets move so fast that their controls are too stiff to be moved entirely by hand power. Instead they are "boosted" by strong-armed hydraulic devices that get their energy from the engine. When the engine stops...

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