Definition
The maximum distance an airplane can fly on a given quantity of fuel, under specified conditions of power setting, altitude, airspeed, weight, and wind. Range is distinct from endurance, which measures time aloft rather than distance covered.
Plain English
Context Anchor
Seen in energy management, aircraft performance, and flight planning discussions when deciding whether the airplane can safely reach a destination or another suitable landing place.
Derivation
From the Old French 'ranger,' meaning to arrange in a row or extend over a distance. In aviation it carries the sense of 'how far something reaches' — the distance the airplane can cover.
Why Pilots Care
Determines whether a destination or alternate is reachable on available fuel and guides power settings for efficient flight.
Intuition Check
Do not read range here as just any “set of values,” like a temperature range. In this context, range means the airplane’s usable flying distance.
Example Sentence 1
At a higher cruise altitude with a leaner mixture, the airplane's range increased noticeably on the cross-country leg.
Example Sentence 2
The pilot leaned the mixture to best economy to extend the aircraft's range during the cross-country flight.