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Spark photography image of a vortex ring in flight. 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 line that forms a closed loop. The dominant flow in a vortex ring is said to be toroidal, more precisely poloidal. [clarification needed]
[24] [27] The USAF investigation ruled out brownout conditions, enemy fire, and vortex ring state as causes. The investigation found several factors that significantly contributed to the crash: these include low visibility, a poorly-executed approach, loss of situational awareness, and a high descent rate.
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 severe loss of lift. Often the term settling with power is used as a synonym, e.g., in Australia, the UK, and the US, [ 2 ] [ 3 ] [ 4 ] but not in Canada, which uses the latter term for a ...
The Osprey is hard to fly, especially if the aircraft enters a vortex ring state (VRS), a condition that affects helicopters and forces them to lose lift when entering their own downwash ...
As the V-22 descended to land it was dropping at 2,000 feet a minute, well above the prescribed 800 feet a minute. The speed caused the aircraft to enter an aerodynamic condition known as vortex ring state. In this condition, a vortex envelops the rotor, causing an aircraft to lose lift, in essence descending in its own downwash. [6] [7]
24. Vortex Optics. Vortex Optics makes an array of products, including binoculars, gun scopes, tripods and other gear. ... “You see, it doesn’t matter how it happened, whose fault it was, or ...
The calls come regularly, often in a concerned tone of voice: “Whatever happened to Fuego Burger?”. The answer is: not a thing. Fuego Burger is open six days a week at 4400 Benbrook Highway ...
Main rotor disk vortex interference Weathercock stability Tail rotor vortex ring state. Loss of tail-rotor effectiveness (LTE) [1] occurs when the tail rotor of a helicopter is exposed to wind forces that prevent it from carrying out its function—that of cancelling the torque of the engine and transmission. Any low-airspeed high-power ...