The Sensory Experience of Launch. 5-6 g Greyout (loss of peripheral vision); consciousness maintained only with intense effort.
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This is why g force tolerance is a critical factor in the design of both the spacecraft and the training regimen for its crew. For example, a 100-kilogram person experiencing 3 g would feel as if they weigh 300 kilograms.
The vehicle’s shape, or ballistic coefficient, is optimized to cut through the atmosphere with minimal drag, reducing the time spent in the high-dense lower atmosphere where g forces are most punishing. The Space Shuttle, for instance, was engineered to limit crew g forces to around 3 g during the majority of its ascent to ensure safety and comfort.
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This sensation is not merely a byproduct of speed; it is the direct result of acceleration, a physics principle quantified in units of gravitational force, or g. The g force rocket launch represents one of the most intense physical experiences a human can endure, marking the violent transition from Earth’s gravity to the vacuum of space.
More About G force rocket launch
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