Definition
The greatest gain in altitude per unit of time an airplane can achieve at a given weight, configuration, and atmospheric condition. It is flown at the airspeed (Vy) where the difference between power available and power required is greatest, producing the most excess power for climbing.
Plain English
The fastest the airplane can climb, measured in feet per minute. It happens at the speed where the engine has the most extra power left over after just keeping the airplane flying level.
Context Anchor
Seen in climb performance, takeoff planning, and energy-management discussions, especially when comparing how quickly the airplane can move from a lower altitude to a higher one.
Derivation
Rate comes from the idea of a measured amount. In this term, the measured amount is altitude gained over time, so rate of climb means how fast the airplane is gaining height.
Why Pilots Care
Determines how quickly a pilot can reach a desired altitude for obstacle clearance, traffic avoidance, or entering controlled airspace.
Grounding Statement
If the airplane is climbing at 700 feet per minute, that number is its rate of climb at that moment.
Intuition Check
Do not confuse maximum rate of climb with the steepest climb path. Maximum rate of climb means the most altitude gained per minute; the steepest climb path means the most altitude gained over distance across the ground.
Example Sentence 1
After takeoff, the pilot pitched for Vy to achieve the maximum rate of climb and reach cruising altitude as quickly as possible.
Example Sentence 2
Performance charts list the maximum rate of climb for the current weight and density altitude.