Definition
The set of properties that determine how an aircraft (or a part of it, such as a wing) behaves as air flows over and around it — including how much lift it produces, how much drag it creates, how it stalls, and how it responds to control inputs at various speeds and angles of attack.
Plain English
How an aircraft flies through the air — how well it lifts, how cleanly it cuts through the air, how it handles, and at what point it stops flying smoothly.
Context Anchor
Seen in structural icing discussions when describing how ice on the airplane changes performance and handling.
Derivation
From Greek 'aero' (air) and 'dynamis' (power, force). Aerodynamic literally refers to the forces of moving air. 'Characteristics' means the distinguishing features of something. Together: the flight behaviour produced by air moving over the aircraft.
Why Pilots Care
Ice accumulation alters these characteristics, raising stall speed and reducing control effectiveness.
Analogy
A clean wing is shaped to let air flow smoothly over it. Adding ice is like adding rough, uneven bumps to a smooth tool that depends on its shape to work correctly.
Intuition Check
Do not read characteristics as general features or personality traits of the airplane. Here it means the specific flying behavior caused by airflow over the aircraft.
Example Sentence 1
Even a thin layer of ice on the wing can alter the aircraft's aerodynamic characteristics, increasing stall speed and reducing lift.
Example Sentence 2
The pilot monitored how changing aerodynamic characteristics affected control feel after entering the icing layer.