Towards Urban Air Mobility: Air Taxis with Side-By-Side Rotors

Visualization of NASA’s side-by-side rotorcraft concept for UAM in forward flight. This back view shows the complex 3D vortex wake from the intermeshing rotors. Note the rolling of the vortex wake at far right and left. Interactions of the vortices in the overlapping region (center) produce a roll-up of the wake. Vortices are colored by vorticity m