Definition
A descriptor for an aircraft, model, or device that is operated remotely by an operator on the ground using radio signals rather than by an onboard pilot. In aeronautical publications, the term most often refers to radio-controlled model aircraft, whose operation near airports and other aircraft is governed by specific guidance to avoid conflict with manned flight.
Plain English
Something flown or operated from the ground by a person using a radio handset, instead of by a pilot inside the aircraft.
Context Anchor
You may see RC in aviation references involving model aircraft, small remote-controlled aircraft, or activity near an airport that pilots should be aware of.
Derivation
‘Radio’ comes from the Latin radius, meaning ‘ray’ or ‘beam,’ referring to radio waves that travel outward like beams. ‘Controlled’ means directed or commanded. Together: directed by signals sent through the air. Knowing this helps the term feel concrete — the operator’s commands physically travel as radio waves to the aircraft.
Why Pilots Care
Pilots must remain aware of RC aircraft to prevent conflicts in shared airspace.
Intuition Check
RC does not mean someone is only talking on a radio. It means the control commands themselves are being sent by radio signal.
Example Sentence 1
The notice warned pilots of RC model aircraft activity within five miles of the small airfield.
Example Sentence 2
AIM guidance requires notification before conducting RC flights in controlled airspace.