Keywords: Vortex ring helicopter.jpg The straight arrows indicate airflow circulation about the rotor disc The helicopter shown is the RAH-66 Comanche en wikipedia El Grafo 2004-08-18 Xmnemonic wikipedia en Xmnemonic original upload log page en wikipedia Vringrah66 jpg 2004-08-18 22 15 Xmnemonic 611×366× 60168 bytes <nowiki>Vortex ring diagram revised - 3d modeling and rendering done by myself</nowiki> 2004-08-16 20 38 Xmnemonic 535×284× 42854 bytes <nowiki>Vortex ring diagram - 3d modeling and rendering done by myself</nowiki> Drawings of helicopters Lift-induced vortices Toroidal vortices Fluid dynamics applied to helicopters |