http://www.fai.org/downloads/casi/SC12_UAV
FAI definitsioon UAV-dele:
1.1 General Definition
1.1.1 Unmanned Aerial Vehicle (UAV) - an aerodyne with a means of propulsion, that does not carry a human, which is designed for scientific research, commercial, governmental, or military purposes.
Mudellennukid on rahvusvaheliselt täiesti omaette ja rangelt reguleeritud mehitamatta lennukite liik:
PART ONE - GENERAL REGULATIONS FOR MODEL AIRCRAFT
1.1. GENERAL DEFINITION OF MODEL AIRCRAFT
A model aircraft is an aircraft of limited dimensions, with or without a propulsion device, not able to carry a human being and to be used for competition, sport or recreational purposes
For the whole flight, a radio-controlled model aircraft shall be in the direct control of the flier, via a transmitter, and in the flier’s sight other than for momentary periods.
For control line model aircraft, the flier must physically hold the control line handle and control the model aircraft himself.
Free flight model aircraft must be launched by the flier and must not be controlled remotely during the flight other than to stop the motor and/or to terminate the flight
A model aircraft shall not be equipped with any device that allows it to be flown automatically to a selected location.
Raadioplaanerite toppiloodid maailmas suudavad lennata ja lendavad mõnigi kord võistlustel 1 kilomeetrist kaugemal. Termikalennu võistlustel tõusevad mudelid terves maailmas tihti lennuvälja kohal 150 meetrist kõrgemale.