Definition
A category of light-sport aircraft in which the pilot controls pitch and roll by physically shifting the aircraft's weight relative to a fixed wing, rather than by moving control surfaces such as ailerons or elevators. The wing is typically a flexible delta-shaped fabric wing mounted above a small powered carriage (trike), and the pilot pushes or pulls a control bar to change the wing's angle relative to the carriage.
Plain English
An aircraft that you steer by leaning and pushing a bar to shift your weight under the wing, instead of using a yoke or stick connected to flaps on the wings and tail.
Context Anchor
Seen in light-sport aircraft discussions, especially when describing trike-style aircraft with a wing above a suspended carriage.
Derivation
The name describes exactly how the aircraft is flown: control is achieved by shifting weight. The term was adopted by the FAA when light-sport aircraft categories were created in 2004 to formally recognize this distinct type of flying machine, which had previously existed mainly as ultralight hang gliders with engines.
Why Pilots Care
It provides simple, direct control in weight-shift-control aircraft without complex mechanical linkages, but requires the pilot to understand its unique handling characteristics for safe operation.
Grounding Statement
Picture the wing overhead and the pilot’s carriage hanging below it; moving the carriage changes the balance under the wing, and the aircraft responds.
Intuition Check
Do not assume weight-shift-control means simply leaning your body inside a normal airplane. Here it means the aircraft is designed so its balance point moves relative to the wing as the primary way to control it.
Example Sentence 1
The student trained in airplanes, so she needed additional instruction before she could solo a weight-shift-control aircraft.
Example Sentence 2
In weight-shift-control aircraft, pushing the control bar forward lowers the nose by shifting the pilot's weight aft relative to the wing.