Have you ever noticed that military and recreational drones have four propellers, but helicopters have three? Here's ...

Helicopters are set apart from other aircraft in a very big way: the rotors. There's the main rotor and the tail rotor. Ever ...

The model is based on a propeller velocity field model and characterization of change in propeller thrust under oncoming flow. Using this model, we predict forces and torques on one mutirotor due to ...