The horizontal stab was in fact moved forward along the tailboom because it wasn’t powerful enough for the helicopter outside the downwash. And importantly ... and we were off the ground, holding a ...

While helicopters can hover in a manner similar to blimps, they do burn fuel when they stay in one place, they’re much louder and they have a huge downwash—that massive rush of air hitting anything ...

The National Police Air Service of England and Wales notes that "Each helicopter has a maximum endurance of approx two hours," in terms of staying in the air overall, and that "hovering on a hot ...

The New York City tour helicopter that plummeted into the Hudson River Thursday, killing six people, was once used in a now-chilling promotional video trumpeting the alleged safety record of the ...

Dozens have died in accidents since helicopters were allowed in the city in 1949. Residents have complained for nearly as long, but reforms rarely stick. By Stefanos Chen The helicopter has been a ...

Yet hovering an aeroplane is fantastically harder than getting ... Older downwash models tended to model helicopter downwash as a steady 'doughnut' whereas in fact it is in pulsing 'clumps' of higher ...

In addition, the study – Protecting the Future: Trials and Simulation of Downwash and Outwash for Helicopters and Powered ... were taken with the heavy-twin hovering at heights of 65ft and ...

We later did a hover autorotation ... a rotary-wing flying condition in which a helicopter descends in its own main rotor downwash. At these slow speeds, crosshatching appears on the vertical ...

The video said a major aerodynamic challenge was transitioning the aircraft from helicopter to wing-borne flight, requiring new control laws for the maneuver. The downwash from the rotors blows ...

CRYSTAL, WHAT CAN YOU TELL US? TROY, CREWS HAVE LEFT THE SCENE OF THE CRASH. WE'VE LEARNED THAT THIS WAS AN 'AIRCARE', A MEDICAL HELICOPTER THAT RESPONDS TO EMERGENCIES ACROSS THE STATE. THIS IS THE ...

The procedure is repeated until the blade bound circulation or downwash velocity remains unchanged in ... Calculations are performed for the flow field of a model helicopter rotor in hover at various ...