The Reference Guide
What counts as a drone, the anatomy of a multirotor, how four fixed-pitch propellers produce every movement, why none of it works without the computer, the battery ceiling, navigation and autonomy, the United States rulebook, how the technology got here, and where it causes trouble. Every quiz here comes from a section of this guide.
Open the Reference GuideThe Quizzes
Roughly in the order the guide covers them. The last one assumes the rest — leave it until you have worked through the others, then use it to find out what did not stick.
What Counts as a Drone
The acronyms, the legal definitions, the weight thresholds, and the cases that sit right on the edge — cruise missiles, model aircraft, kites, satellites, air taxis.
Anatomy of a Multirotor
Every part a multirotor is made of: what it does, why it is specified the way it is, and how it fails. Flight controller, sensors, motors, propellers, battery, links and payload.
How a Quadcopter Actually Flies
Where the lift comes from, how four fixed-pitch propellers produce every possible movement, and why yaw is made of torque rather than thrust.
Why It Needs the Computer
The control system: sensor fusion, nested loops and tuning, the mixer running out of authority, the trade between filtering and latency, and what happens at the failsafes.
The Battery Ceiling
Why drones fly for twenty minutes and not two hours — the chemistry, the arithmetic of hovering, planning a flight around it, and what the alternatives actually cost.
Navigation and Autonomy
How a drone works out where it is: satellites and their failure modes, centimetre corrections, navigating with no signal at all, obstacle sensing, and mapping missions.
Risk, Security and Counter-Drone
Airspace conflict, detecting and stopping drones, attacks on navigation, privacy and trespass, and the supply-chain rules now reshaping what you are able to buy.
Worth Remembering
The capstone. Not recall — connecting one fact to another and applying both to something real. Field scenarios, design trade-offs, and the numbers put to work.
Each quiz expands one part of the reference guide into 50 questions grouped into six themes. Options are reshuffled every time you start, and every set was checked against all the others so no question is asked twice. One deliberate constraint runs through all of them: the four options are kept close in length, so the longest answer is never a giveaway. Across the whole collection the correct answer is the longest option about a quarter of the time — which is exactly what chance would give you.
Every rule, figure and date here is United States law, taken from the eCFR and the FAA rather than from secondary sources, and current as of August 2026. This area moves quickly — beyond-line-of-sight flight is still only proposed, the restrictions on foreign-made aircraft are under legal challenge, and counter-drone authority changed in July 2026. Verify anything you intend to rely on before you rely on it.