Definition
The push or pull pressure a pilot feels on the control stick or yoke along its fore-and-aft axis, which controls the airplane's pitch attitude. These forces change with airspeed, power setting, trim, center of gravity, and flight configuration, and must be managed during climbs, descents, and trim changes.
Plain English
How hard the pilot has to push or pull the stick forward or backward to keep the nose where they want it.
Context Anchor
Seen during takeoff and initial climb, especially when the pilot is holding climb speed, adjusting nose position, or relieving control pressure with trim.
Derivation
Longitudinal comes from the Latin longitudo, meaning 'length.' In aviation, the longitudinal axis runs nose-to-tail, so longitudinal stick forces are the forward-and-back pressures on the stick that pitch the nose up or down along that axis.
Why Pilots Care
Untrimmed longitudinal stick forces increase pilot workload and can mask airspeed changes during the critical climb phase.
Intuition Check
Do not read longitudinal as meaning “for a long time.” Here it means the airplane’s nose-to-tail direction, which is tied to nose-up and nose-down control. Do not read stick as only a literal stick; it can also mean the yoke or other pitch control the pilot moves by hand.
Example Sentence 1
As the airplane accelerated through rotation speed, the pilot anticipated the increasing longitudinal stick forces and trimmed nose-up to relieve them.
Example Sentence 2
A sudden increase in longitudinal stick forces during climb may indicate icing or a change in power setting.