The vortex ring state (VRS) is a dangerous aerodynamic condition that may arise in helicopter flight, when a vortex ring system engulfs the rotor, causing...

A vortex ring, also called a toroidal vortex, is a torus-shaped vortex in a fluid; that is, a region where the fluid mostly spins around an imaginary axis...

The vortex ring gun is an experimental non-lethal weapon for crowd control that uses high-energy vortex rings of gas to knock down people or spray them...

quadcopters are subject to normal rotorcraft aerodynamics, including the vortex ring state.[citation needed] The main mechanical components are a fuselage or...

determined that the aircraft had entered an aerodynamic condition known as vortex ring state, which resulted from a high rate of descent compounded by pilot error...

arrest its descent. This hazard can develop into vortex ring state if not corrected early. Vortex ring state is a hazard induced by a combination of low airspeed...

Rhein-Sieg, public transport in the Cologne/Bonn region of Germany Vortex ring state, a helicopter flight condition Skoda vRS car models an alternate abbreviation...

In fluid dynamics, a vortex (pl.: vortices or vortexes) is a region in a fluid in which the flow revolves around an axis line, which may be straight or...

software, and procedures in response to hydraulic fires in the nacelles, vortex ring state control issues, and opposed landings; reliability has improved accordingly...

original on August 15, 2017. Retrieved August 15, 2017. "Vortex Ring State: Virginia State Police Bell 407 Fatal Accident". aerossurance.com. July 18...

Paul Edwards has stated that the AW609 was not susceptible to the vortex ring state phenomena, naturally slipping out of the vortex on its own since both...

effect (aerodynamics) Transverse flow effect Dissymmetry of lift Vortex ring Vortex ring state Croucher, Phil (2007). Professional Helicopter Pilot Studies...

exploded, killing all 19 on board. The cause was determined to be vortex ring state (VRS), a fundamental limitation on vertical descent which is common...

pedal work for the pilot to eliminate unintended yaw. Tail rotor vortex ring state - Wind moving in the same direction as the tail rotor moves air. With...

first helicopter experienced a hazardous airflow condition known as a vortex ring state. This was aggravated by higher-than-expected air temperature and the...

January 2024). Performance of the Dragonfly Lander's Coaxial Rotor in Vortex Ring State (PDF). Propeller/Rotorcraft/Wind Turbine Aerodynamics II. NASA. doi:10...

Investigation report determined "The helicopter probably entered a vortex ring state during the final approach". The pilot and crewman received minor injuries...

altitude permits, autorotations may also be used to recover from a vortex ring state, also known as settling with power. In all cases, a successful landing...

configuration. If such a craft is flown in a way where it enters a vortex ring state, one of the rotors will always enter slightly before the other, causing...

Vertical path V/R Voltage regulator VRP Visual point of reference VRS vortex ring state Helicopter flight phenomenon V/S Vertical speed VSCF variable speed...

pick-up from departing LNG tanker in night VFR conditions, entered a vortex ring state. After ditching, it stayed afloat for over two hours.[citation needed]...

vortex in Wiktionary, the free dictionary. A vortex is a dynamic phenomenon of fluids. Vortex may also refer to: Vortex ring, a torus-shaped vortex in...

of tail-rotor effectiveness, Retreating blade stall,Dynamic stall, Vortex ring state, Servo transparency, Must bumping, and Tailstrike. Because the main...

Investigation report determined "The helicopter probably entered a vortex ring state during the final approach". The pilot and crewman received minor injuries...

projected onto a flat surface, an optical vortex looks like a ring of light, with a dark hole in the center. The vortex is given a number, called the topological...

and Higuchinsky's Uzumaki (2000, a.k.a. Vortex, based on the Junji Ito horror manga of the same name). Ring had some influence on Western cinema and...

effectiveness Low-g condition Retreating blade stall Dynamic stall Vortex ring state Servo transparency Tailstrike Related Bamboo-copter Cyclogyro Helicopter...

example, vortex rings will shrink, and Kelvin waves will decrease in amplitude. Vortex lattices are laminar (ordered) configurations of vortex lines that...

indicated that a combination of factors had placed the helicopter into a vortex ring state at low altitude which made impact "unavoidable". The Lerwick and Aith...

The Arctic tropospheric polar vortex A circumpolar vortex, or simply polar vortex, is a large region of cold, rotating air; polar vortices encircle both...