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They stabilse the main rotor to keep in one place

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9y ago

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How do helicopters hover?

A helicopter moves forwards by the rotors spinning, and being slightly tilted. So if the rotors are flat, it will hover. This is because the air being pushed by the rotors is going straight down, not onto another surface, thereby making it go forwards.


Why helicopters have Wind limitations?

All aircraft, not just helicopters, have wind limitations. Essentially they are placed so that structural limits will not be exceeded. If too much wind force is exerted on part of an aircraft that is not strong enough to withstand that force then a catastrophic failure could occur.


How might an aeroplane fly like a helicopter?

It flies Like an Airplane and Hovers Like a Helicopter... or if the engine has enough power to it, and the pilot brings it up to a 90 degree climb, lets it slow down, then adjusts the throttle to hover the plane...


Why can't rescue helicopters fly in low air pressure?

I've never heard that. However, helicopters are limited to the altitude that they can hover, which would limit a Rescue helicopter from picking up a stranded mountain climber. In the high altitude, the air is "thinner" which means the air pressure is less. This limits the effiency of the rotor blades. However, usually the first indication of a problem is when a helicopter tries to hover at high altitude and the tail rotor looses it thurst and the helicopter goes into an uncontrolled spin. This was common with the Bell Model 206B. Even though a helicopter may be limited to the altitude at which it can hover, that does not mean it can't fly at that altitude. If a helicopter maintains a high forward air speed, it can still fly over mountains; its only when it stops and hovers that it may have problems.


How does a hover craft work?

A hovercraft works by directing a powerful downward stream of air through a hull skirt, creating a cushion of air underneath the craft. This cushion reduces friction with the surface below, allowing the hovercraft to glide smoothly over various terrains such as land, water, or ice. Steering and propulsion are achieved by altering the direction of the airflow.