- Ordinarily, quadcopter drones have to tilt their front end downward when flying forward.
- In this setup, when modest amounts of thrust are produced, the springs hold the rotors horizontally in line with the body.
- Once a high enough level of thrust is produced, however, the rotor arms overcome the force of the springs, temporarily tilting into the forward flight direction by up to 20 degrees relative to the rest of the drone.
Passive-tilting rotors shown to boost drone speed and efficiency
