Definition
G force is the load felt by the airplane and its occupants expressed as a multiple of normal Earth gravity. One G equals the weight you feel sitting still on the ground. In a maneuver, G force rises above 1 G when the wings produce more lift than the airplane's weight (such as in a turn or pull-up), and can fall below 1 G or become negative when lift is reduced or reversed (such as in a pushover).
Plain English
It is how heavy you and the airplane feel during a maneuver, compared to how heavy you feel just standing on the ground. Pulling up sharply makes you feel heavier than normal; pushing the nose down quickly makes you feel lighter or even briefly weightless.
Context Anchor
You encounter G force when learning how the airplane feels in turns, pull-ups, turbulence, and other maneuvers that change the airplane’s direction or speed.
Derivation
The 'G' stands for gravity. Engineers and pilots measure maneuvering loads in multiples of normal gravity because that is the load every pilot already knows by feel — their own body weight at rest.
Why Pilots Care
Exceeding design or personal G limits can damage the aircraft or cause loss of consciousness, so pilots must anticipate and manage these forces during maneuvering.
Analogy
It is the same sensation as a fast elevator or a roller coaster — pressed into the seat going up, light in the seat going over the top.
Grounding Statement
When you pull back in a turn or recovery and feel pressed down into the seat, you are feeling increased G force.
Intuition Check
G force does not mean the airplane is necessarily going faster. It means the airplane and pilot are feeling more or less than normal weight because the airplane is accelerating or changing direction.
Example Sentence 1
During the steep turn, the student felt the increased G force pressing them into the seat as the airplane held its bank.
Example Sentence 2
The pilot eased the back pressure to reduce G force and keep the airplane within its certified load limits.