Definition
A metric unit of torque equal to the turning force produced when a one-kilogram force is applied at the end of a lever one meter long, measured perpendicular to the lever.
Plain English
A way to measure twisting force in metric units. If you push down with one kilogram of force on the end of a one-meter wrench, you've applied one meter-kilogram of torque.
Context Anchor
Seen in older aviation maintenance, engine, and physics references when work or energy is described in metric units.
Derivation
Built from the two metric units it combines: meter (length of the lever arm) and kilogram (force applied). The unit's name literally describes how torque is calculated -- force times distance.
Why Pilots Care
A pilot or mechanic may see this unit in older manuals or technical explanations. Knowing it is a unit of work helps prevent confusing it with a simple weight or distance measurement.
Grounding Statement
Picture lifting a 1-kilogram object from the floor to a shelf 1 meter higher; that lifting work is one meter-kilogram.
Intuition Check
Do not read meter-kilogram as a length or a mass. It is a unit of work: force applied through distance.
Example Sentence 1
The maintenance manual specified that the propeller bolts be tightened to 4 meter-kilograms of torque.
Example Sentence 2
Mechanics converted the propeller moment from meter-kilograms to check blade balance.