Definition 1 of 2
Definition
A rigid tubular shaft that transmits twisting (rotational) force from one point to another within an aircraft system. In landing gear, a torque tube transfers the rotational motion of an actuator or linkage to raise, lower, or steer the gear, and resists twisting loads during operation.
Plain English
A strong hollow tube used to pass a turning or twisting force from one place to another. In the landing gear, it carries the push or pull from a moving part to make the wheels go up, come down, or turn.
Context Anchor
Seen in landing gear system descriptions, especially where one moving part must mechanically move or coordinate with another part.
Derivation
Torque comes from the Latin torquere, meaning 'to twist.' A torque tube is literally a tube that handles twisting force — that is its job.
Why Pilots Care
A damaged or binding torque tube can prevent the landing gear from retracting or extending fully, creating a safety issue on takeoff or landing.
Analogy
Think of turning a long screwdriver: when you twist the handle, the shaft carries that twist to the tip. A torque tube does a similar job inside an aircraft system.
Intuition Check
Do not read “tube” here as a pipe meant to carry fluid. A torque tube’s job is to carry twisting force and motion.
Example Sentence 1
When the gear handle is moved down, hydraulic pressure rotates the torque tube, which lowers the main landing gear into position.
Example Sentence 2
The hydraulic actuator turned the torque tube to raise the main landing gear after takeoff.