What effect does the acceleration of an aircraft during climb have on altitude perception for the pilot?

When an aircraft accelerates during a climb, the pilot may experience a phenomenon known as "G forces." As the aircraft accelerates, the additional thrust generates a higher load factor, which can lead to sensations that may affect altitude perception. Specifically, during an acceleration climb, the pilot may feel a pressing sensation pushing them into their seat, which can create an illusion of a decreased climb rate or even horizontal flight instead of climbing. This is primarily due to the fact that physical sensation can influence the pilot's judgment of vertical speed.

Understanding this effect is critical for pilots, as it emphasizes the need to rely on instruments, particularly the vertical speed indicator, to ensure accurate altitude awareness rather than solely on physical sensations or perceptions during various phases of flight. The pilot must remain vigilant in their instrument scan to avoid misjudgment, as this misperception can lead to inappropriate control inputs or altitude management.