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Why does a helicopter lose altitude when flying over a water surface?
Wiki User
∙ 14y ago
A helicopter needs a solid surface to fly over.
Wiki User
∙ 14y ago
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Destructive radius of a five kiloton nuclear explosion?
Airburst and altitude, Surface burst, Subsurface burst and depth (dirt, rock, or water)? Different in each case.
How does the helicopter stay stationary in the air?
Two things keep a helicopter flying, and another keeps it flying straight. To take off: 1) The blades are shaped like the wings of an airplane and create a difference in pressure (high underneath the wing, low above). This difference in pressure "pushes" the helicopter upwards (lift). But because of gravity, however, there might not be enough lift to take off from the ground. 2) In order to take off, the blades must rotate at supersonic speeds (to be stronger than gravity's push downwards), this make it possible to gain altitude. To "Fly:" 1) A helicopter's blades in air act like a boat's propeller in water. If the blades rotate at an angle, it will start moving. To make the helicopter hover, the blades must be perfectly straight up. At the same time, the rotating blades make the helicopter itself rotate the other way (about the axis of rotation). In a GPS, the helicopter would not be going anywhere like this (with no angle on the blades), but the Direction at which it is looking will be changing in circles 2) Helicopters need a way to fix this crazy-out-of-control spinning. They can use a tail rotor for this, but they can also use a "twin" set of blades that rotate in opposite directions (counter-rotating blades). With the addition of counter-spinning blades, now the GPS will be pointing at 1 direction. in summary: 1) By keeping the blades rotating fast enough to be lifting with the same force as gravity is pushing down, the altitude is kept the same. 2) By keeping the Blades from spinning at an angle, the Helicopter does not move to the sides. 3) By using a counter-rotating blades set, the helicopter is able to keep looking at one direction. with these 3 things, Helicopter are able to hover in air, and their GPS can be kept and a fixed height, at fixed position on a map, and at a fixed direction.
What makes a needle to float in water?
Water surface tension hold the needle on the water surface.
What is the thing that spins at the top of a helicopter?
The spinning thing on top of a helicopter is called a 'rotor'. They are also on the end of boats to propel them through water.
What does not affect the amount of heat a body can store?
altitude
What are the chances of dying in a helicopter crash?
If you are flying over a dense forest, over deep water, and over high snow, and the helicopter suddenly crashes you have a pretty chance of getting out of the helicopter.
How far deep do flying fish live?
Flying fish live close to the surface of the water. This is because they use the waves to increase their mobility through the water.
Can great white sharks take down helicopters?
They don't. That pic is a fake, a montage.
Is there a Skimming aircraft structure flying fast on top of water surface?
Yes there are. They float and can land on water.
Do you have to be able to swim to work on an oil rig?
Not always. If you get transferred by boat to the rig it might not be a requirement. If you work on rigs where you get transferred by helicopter, you will have to be able to at least swim from a helicopter body from 3 to 4 meters below the water surface to the surface. This might be the only time you will ever need to be able to swim in the unlikely event of a helicopter ditching into the sea. Other times there will always be flotation devices ready. There is a training course required for operations with helicopter transfers. It is called HUET (Helicopter Underwater Escape Training). During this course you will be placed in a helicopter fuselage and dropped into the water. Once it is submerged and settled, only then can you undo the seat belts and escape via door or window (depending where you sit in the helicopter) to the surface. You are not allowed to inflate a flotation/life vest until you reach the surface.
Why is john white famous?
he is famous for flying around the world in 3 days and only 2 stops 3 bottles of water and 3 sacs of food in a small helicopter.
How high is south lake Tahoe?
Lake Tahoe's surface elevation level is reported to be 6,225 feet (1,897 meters).
Why do frogs like still water?
In still water, frogs can see the ripples created when flying insects (their food) touch the water surface to drink or lay eggs.
What is the answer it the riddle There is a scubadiver with an empty air tank dead in the middle of the forest His body is dry and there is no water around How did he get there?
One possible answer involves a forest fire and a very charred scuba diver. During a fire a water carrying helicopter collected water from the sea in order to extinguish it. However the helicopter also picked up the scuba diver, in the sea water, and the diver was killed when he was dumped in the middle of the fire, most likely from a high altitude.
What is the relationship between water vapor and altitude?
as altitude inscreases, water vapor level decreases
Are there special helicopters for water?
yes, there are but it depends what you mean. there are helicopters that can land on water, carry water(firefighter helicopter),amphibious helicopter,etc...
Is it true or false that the height of an object above sea level is its relief?
This height is called the altitude. It is the amount of distance between the object and the surface of water.
