Science: Trial by G

The modern military airplane carries a frightening passenger. The name is G.* During steady, level flights, G keeps still as a mouse, but when the plane makes a turn or pulls out of a dive, G takes charge. Every part of the pilot's body grows unnaturally heavy. His cheeks sag; his jaw drops open; the blood rushes out of his brain; his guts crowd into his belly. Too many Gs can black a man out, cripple him or even kill him. Air battles of the future, fought above the speed of sound, will be...

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