G-force limits in design
Designers cap sustained positive G — your body tolerates brief spikes differently than long presses.
Amusement rides target safe, tolerable force envelopes — not maximum possible G for thrills alone.
Positive G is tolerated differently depending on duration and direction. A brief spike in a drop bottom differs from sustained helical pressing.
Greyout (vision narrowing) can occur with extreme positive G — rare on well-designed public coasters but discussed in fighter jet terms enthusiasts borrow.
Engineers use simulation and prototyping; parks follow manufacturer inspection schedules so forces stay within spec as components wear.