Downwash

"There is then potential for a breakthrough in the current Libyan stalemate to create a short-term downwash in oil prices, but we would not expect that move to stick for long," the analysts said.

The aircraft's heavy "downwash" of air from the rotors is so strong it has dislodged on-deck equipment. ❋ Unknown (2009)

Coroner Andrew Walker ruled that the blast which killed Corporal Mark Wright, 27, was caused by the 'downwash' from a Chinook which had been sent to rescue a platoon of Paras stranded in an unmarked minefield. ❋ Unknown (2008)

Corporal Mark Wright, of the 3rd battalion Parachute Regiment, was killed by a landmine set off by the 'downwash' from a Chinook ❋ Unknown (2008)

On both days I visited, smoke was blowing toward the base, and a "downwash" effect was causing the smoke to billow across playing fields into base housing and schools. " ❋ Unknown (2009)

It could happen anytime the flow of air from below a rotor equaled its downwash, which was most likely to occur close to the ground, he argued. ❋ Richard Whittle (2010)

With the downwash from its rotors kicking up clouds of dust, Erhart then lifted the XV-15 into a hover and climbed vertically to about 100 feet, roughly a third as high as the Capitol dome. ❋ Richard Whittle (2010)

He thought Dunn had some valid criticisms of the Osprey, such as his argument that its powerful rotor downwash would kick up a pilot-blinding “brownout” of dust and dirt in a desert landing zone. ❋ Richard Whittle (2010)

When a rotorcraft takes off straight up or hovers, it has to produce a pound of thrust for every pound it weighs, plus enough to compensate for whatever portion of its rotor downwash pushes down on the fuselage and other parts of the machine. ❋ Richard Whittle (2010)

Carrying packs and weapons, the thirty-three Marines ran out to the rear ramps of the Ospreys at a 45-degree angle to avoid the powerful downwash. ❋ Richard Whittle (2010)

The deck crews were able to work under the Osprey despite the powerful downwash from its rotors with their high disk loading. ❋ Richard Whittle (2010)

This was an allusion to vortex ring state, the phenomenon blamed for the Marana crash, in which a rotor that descends too quickly into its own downwash no longer creates thrust properly. ❋ Richard Whittle (2010)

Shaffer and Sweaney exchanged grins and a thumbs-up as they brought the new Osprey in over a small stand of trees between the river and the parade ground and their rotor downwash only blew a few leaves and branches down. ❋ Richard Whittle (2010)

The downwash is now churning in a “vortex ring,” an air flow pattern seen in smoke rings, and the rotor has entered “vortex ring state.” ❋ Richard Whittle (2010)

A rotor that descends fast enough to start ingesting its own turbulent downwash can stop producing enough thrust to provide lift. ❋ Richard Whittle (2010)

The officer cools himself under the rotor downwash as two soldiers in the lower right-hand corner take in the spectacle. ❋ Richard Whittle (2010)

At the tips of the blades, some downwash circles back over top of the rotor disk and is pulled back through. ❋ Richard Whittle (2010)

Their literally hurricane-force downwash meant the Osprey would have to descend far faster at low forward speeds than a helicopter would for the flow of air from beneath its rotors to equal the flow of air the rotors created—the recipe for vortex ring state. ❋ Richard Whittle (2010)

[Oh shit] downwash ❋ Wagcheese (2021)