Technology
How does a drone fly?
A drone flies using several small spinning propellers — usually four — that each generate lift. An onboard computer constantly adjusts the speed of each propeller thousands of times a second to keep it stable and steer it in any direction.
See it in motion.
Watch a 2-minute animated lesson that shows exactly how a drone works.
Step by step
- 1Each propeller (rotor) pushes air down to create lift, like tiny helicopter blades.
- 2Speeding up or slowing individual rotors tilts the drone to move forward, back, or sideways.
- 3A flight controller with gyroscope and accelerometer sensors keeps it balanced automatically.
- 4Spinning adjacent rotors in opposite directions cancels out unwanted spin.
- 5GPS and cameras let many drones hold position or fly preset routes on their own.
Frequently asked questions
- Why do most drones have four propellers?
- Four rotors (a quadcopter) give simple, stable control: adjusting their relative speeds tilts and turns the drone without needing a tail rotor.
- How does a drone stay so stable?
- Onboard sensors detect tiny tilts and a computer corrects each rotor's speed thousands of times per second, far faster than a human could.
- How do drones hover in place?
- The flight controller balances all rotors so total lift equals the drone's weight, and uses sensors (and often GPS) to hold position.