In Inversion Illusion, leveling off after a climb produces which sensation?

In Inversion Illusion, leveling off after a climb produces which sensation?

• A. A strong positive Gs sensation.
• B. A slight negative Gs sensation.
• C. No Gs sensation.
• D. A strong lateral acceleration.

Answer: (B)

Inversion illusion is a vestibular illusion that happens when you level off after a climb. While climbing you’re experiencing positive Gs from the nose-up attitude and the increased load on the airstream. When you transition to level flight, the aircraft’s pitch changes and the load factor drops back toward 1 G. Your inner ear’s semicircular canals, which sense angular motion, don’t react instantly; they lag behind the actual movement. This mismatch between what your eyes and body feel and what your instruments show can make you feel as though you’re inverted or tumbling, and you may briefly sense a slight negative Gs—felt as being lighter than normal or momentarily pushed away from the seat. So the best match is a slight negative Gs sensation. The other options don’t fit because the climb produces positive Gs, there isn’t a true no-G sensation, and a strong lateral acceleration would come from a turn, not the level-off from a climb.

Inversion illusion is a vestibular illusion that happens when you level off after a climb. While climbing you’re experiencing positive Gs from the nose-up attitude and the increased load on the airstream. When you transition to level flight, the aircraft’s pitch changes and the load factor drops back toward 1 G. Your inner ear’s semicircular canals, which sense angular motion, don’t react instantly; they lag behind the actual movement. This mismatch between what your eyes and body feel and what your instruments show can make you feel as though you’re inverted or tumbling, and you may briefly sense a slight negative Gs—felt as being lighter than normal or momentarily pushed away from the seat. So the best match is a slight negative Gs sensation. The other options don’t fit because the climb produces positive Gs, there isn’t a true no-G sensation, and a strong lateral acceleration would come from a turn, not the level-off from a climb.