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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 different ...
A second "vortex ring" parachute then deploys to slowly spin the submunition, suspending it at approximately 30° from the vertical. As it spins, its sensors sweep a decreasing spiral track beneath the submunition to scan an area about 150 m in diameter.
[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.
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]
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 ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 29 December 2024. Military transport tiltrotor "V-22" redirects here. For other uses, see V22 (disambiguation). V-22 Osprey A MV-22 being used during a MAGTF demonstration during the 2014 Miramar Air Show General information Type Tiltrotor military transport aircraft National origin United States ...
Visible vortex rings can also be formed by the firing of certain artillery, in mushroom clouds, in microbursts, [1] [2] and rarely in volcanic eruptions. [3] A vortex ring usually tends to move in a direction that is perpendicular to the plane of the ring and such that the inner edge of the ring moves faster forward than the outer edge.
Due to the construction of the Mexico–United States border wall, some drug cartels have resorted to the use of quadcopters to smuggle drugs. [28] However, quadcopter drones do not necessarily only smuggle drugs across the border, but there are also cases where weapons and other prohibited items are smuggled into prisons around the world.