Definition
The deliberate control of an airplane's altitude (potential energy) and airspeed (kinetic energy) during a descent so that the airplane arrives at a chosen point at the correct altitude, airspeed, and configuration. It involves planning the top-of-descent point, selecting a descent rate and airspeed, and adjusting power, pitch, and drag devices to stay on the planned path without arriving too high, too fast, too low, or too slow.
Plain English
Managing how you trade height for speed (and the other way around) on the way down, so you reach your target point at the right height and speed without needing to dump altitude or rush at the last minute.
Context Anchor
Encountered when planning descents, entering the traffic pattern, preparing for landing, or correcting an approach that is becoming too high, too fast, too low, or too slow.
Derivation
"Energy" here refers to the airplane's two stored forms of motion: altitude (potential energy) and airspeed (kinetic energy). "Management" means actively planning and adjusting these, rather than reacting to them. The phrase highlights that altitude and speed are not independent -- they convert into each other, and the pilot's job is to control that conversion.
Why Pilots Care
Poor descent energy management produces unstable approaches, excessive go-arounds, runway overruns, or hard landings; consistent management reduces workload and improves safety margins.
Analogy
Think of riding a bike toward a stop sign at the bottom of a hill. If you start coasting too late, you arrive too fast and have to brake hard. Start coasting at the right point and you roll up to the sign at walking pace with no drama. The descent works the same way -- pick the right starting point and the airplane settles onto the target on its own.
Grounding Statement
An airplane that is high and fast has extra energy to reduce; an airplane that is low and slow has little energy left to trade.
Intuition Check
Do not think of descent energy management as just “pointing the nose down.” It means controlling both height and speed throughout the descent, using power, pitch, and drag as needed.
Example Sentence 1
Good descent energy management starts with calculating the top-of-descent point well before the airplane reaches it.
Example Sentence 2
Effective descent energy management allowed the airplane to cross the runway threshold at the correct speed without requiring a last-minute power or pitch adjustment.