Questions tagged [wind]

The flow of air with respect to the ground. This will affect the performance and handling of aircraft and can be a limiting factor.

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9
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2answers
659 views

Has reversing the active runway direction ever led to lined-up aircraft taxiing to the other end of the runway?

I was in an aircraft yesterday waiting for its turn in the departure queue on the taxiway and noticed that the windsock was showing a direction approximately 30 degrees but directed along the ...
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5answers
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Why does the airplane not 'feel' the crosswind?

Apologies for multiple pictures but I thought they would depict my question more clearly than a lengthy description. Image 1: Why does the aircraft still follow the straight path even if the wind is ...
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4answers
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How is wind direction reported (blowing from or blowing to)?

When the tower controller, the ATIS or a METAR says Wind 270, 15 knots does it mean the wind is blowing in the westward or in the eastward direction? Is there a single convention used to express the ...
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3answers
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Are jet streams a net benefit in time and fuel savings?

Suppose a plane has a cruise speed of 400 knots TAS. In a 4000 nm route we would have a round trip of 20 hours. If there was a jet stream of 100 knots in either direction, we would have 4000/500=8 ...
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11answers
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Is it sensible to harness wind energy on an airplane?

Is it sensible to harness wind energy on an airplane? Actually the idea is to build an electric aircraft whose power comes from solar and from wind while the plane is landing. instead of using ...
2
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1answer
2k views

What is the difference between ground speed and airspeed? [duplicate]

What is difference between ground speed and airspeed? Is ground speed used only for takeoff or is it used for flight too?
8
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1answer
14k views

How is the wind direction and wind speed measured in flight?

Most large aircraft have a wind direction and wind speed indicator. How is this measured? The vector difference between TAS and ground speed? How accurate is this? In the below picture (taken from ...
5
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2answers
7k views

How strong must wind gusts be to prevent landings and takeoffs?

I hope this is not as trivial as it sounds. Is there a wind gusts threshold based on which, at a given airport, incoming flights are diverted and outgoing ones are delayed? I assume that aircraft are ...
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3answers
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How heading bug is calculated during cross wind and tail wind?

From this question, it is been suggested to ask different question, rather than keep discussing it under comment section. How is the heading bug calculated and used for navigation when there is a ...
9
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1answer
7k views

What is the use of heading bug?

When I started searching for Heading Bug (other bugs like altitude, speed bugs), I didn't get much clear idea about it. Usually this is displayed on Horizontal Situation Indicator display on the ...
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3answers
3k views

Is there a preferred wind direction for a helicopter in hover?

When hovering, how does a pilot deal with wind direction? As when landing is it preferable to point the nose into the wind? Is this a primary consideration for the pilot considering that he may need ...
19
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4answers
8k views

Do helicopters try to take off and land into the wind?

When helicopters take off and land is it preferable to point the nose into the wind? Since a helicopter is providing its own lift does it matter which direction wind is coming from?
4
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1answer
446 views

Why is the planned Kingdom Tower Skydeck unsuitable for use as a helipad?

Why is the planned Kingdom Tower Skydeck unsuitable for use as a helipad? Originally the skydeck was supposed to be a helipad, but this idea was subsequently rejected and the feature was repurposed as ...
10
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2answers
2k views

What wind change gradient is necessary to be classified as wind shear?

Wind shear is defined as a sudden change in the speed or direction of the wind with altitude. There's got to be some ratio of speed to altitude or directional change to altitude beyond which it's ...
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2answers
2k views

Could a plane land vertically in a strong headwind?

I know there are VTOL craft meant to take off and land with a vertical trajectory. But, under the perfect wind conditions, could a normal airplane ever land (safely) with a vertical or nearly vertical ...
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2answers
4k views

Why would aircraft take-off in the opposite direction as landing despite wind direction?

I have visited and flown out of Harare International Airport, Zimbabwe a number of times and the thing that always baffles me is: Why do aircraft use runway 23 to depart, but runway 05 to land? At ...
9
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2answers
34k views

What is the maximum wind speed a Boeing 737-800 can deal with during takeoff and landing?

I'd like to know how safe the Boeing 737-800 is during takeoff and landing when it's windy. What are the maximum wind speeds for cases of tail, head and cross winds? EDIT I've found this resource ...
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1answer
786 views

Is the airspeed different between above and under the wings? [duplicate]

I heard that when an airplane is flying, air speed or air pressure is higher under the wings. Is it true?
18
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3answers
7k views

How can I know where wind is coming from by looking at water?

For ground reference maneuvers, I know there are many ways that I can know wind direction: smoke, circling, weather reports from nearby airport and so on. However, how can I determine the wind ...
14
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1answer
2k views

Wind speed over which a Canadair fire fighting plane cannot safely fly?

We recently had some forest fires in Athens, Greece while the weather was very windy. The news said it had 8 beaufort of wind speed (34-40 knots, 38–46 mph) and in these conditions it's dangerous to ...
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1answer
527 views

Can microbursts occur at high altitudes?

I was wondering whether a microburst can occur at high altitudes?
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1answer
1k views

Why is a downwind wind speed given in wind checks for aircraft on final?

I have a quick question about wind checks. When I spotting at Sydney (YSSY), I often hear tower clearing aircraft to land and giving them spot wind checks at the runway threshold, all pretty standard. ...
12
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2answers
5k views

Do aircraft carriers always face into the wind?

When landing at a normal ground airport, the runway facing the compass point nearest to the heading of the wind is always operated, so that aircraft landing and taking off alway have to use the least ...
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5answers
6k views

Is head-on or trailing wind better?

Does a powered aircraft fly faster when in a head wind or with a trailing wind? The question revolves around the head wind should provide 'better' lift, and trailing winds have very little to 'push' ...
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3answers
724 views

How do I keep coordinated on a windy day?

I've noticed on windy days that keeping the aircraft coordinated can be difficult -- the ball will tend to bounce back and forth in the turn coordinator, and I will find myself "chasing" it with the ...
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4answers
6k views

In calm winds, which runway should I select at an untowered airport?

In calm wind situations, approaching an uncontrolled airport with no other aircraft reporting on CTAF, which runway should I select that would cause the least safety hazard? Especially at an airport ...
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4answers
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Was this bumpy Boeing 777-300 landing caused by windshear?

I was watching a Video of a Korean Air 777-300 landing at Narita International Airport (IATA: NRT). The Comments on the YouTube Video are again unprofessional. I want to ask here, what caused this ...
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3answers
2k views

How does a large airport switch flow?

Airplanes prefer to land into the wind, and airports adjust for changing wind direction by changing the active runway. I've been flying a small plane in the pattern when the tower asked me to do a ...
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3answers
12k views

How do pilots detect and respond to windshear while landing and taking off?

How does wind shear affect aircraft while landing and taking off? How do pilots detect that they are encountering wind shear and what would they have to do to prevent it from turning into a bad ...
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4answers
19k views

How does wind affect the airspeed that I should fly for maximum range in an airplane?

I have heard that wind affects the actual airspeed that I should fly for maximum range in an aircraft. I understand that wind will not affect the airspeed that I should fly if I am looking for ...
16
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8answers
25k views

Why is tailwind during final approach and landing so dangerous?

I understand that tailwind is typically a good thing during your flight as it increases your ground speed and gets you to your destination faster. Despite that I get a feeling that pilots typically ...
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3answers
14k views

Is a wind speed of 150 km/h dangerous during a flight in an Airbus A321?

I am just curious about this... during one flight on Airbus A321 we experienced turbulence and the pilot told us that the wind speed is 150 km/h, so we won't get drinks and snacks due to safety ...
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3answers
9k views

Are the window wipers on jet aircraft ever deployed in flight?

Many commercial airliners have car-like window-wipers. I would presume this is for taxiing only, as the wind would surely keep the windows free from water when airborne, or do they turn them on in ...
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3answers
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Where can Boeing wind data be found?

There are various services that use world-wide Boeing Winds for forecast wind data which can be used to calculate an approximate flight time between two locations. They usually have best case, worst ...
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4answers
3k views

Can wind shear conditions be identified visually?

Without relying on winds aloft or LLWS data, can pilots identify wind shear conditions visually, by watching clouds or otherwise?
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10answers
10k views

Do pilots ever intentionally takeoff or land downwind?

Is there a reason a pilot would takeoff downwind or land downwind? Is it legal to do this?
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6answers
36k views

What's a quick way to determine which runway to use?

Let's say I call up Wx and have the wind direction and I know the runway headings from my charts and the pattern is empty. I can do the math, but it's tedious and slow and even worse when there are ...
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4answers
78k views

When are winds given with respect to true vs. magnetic north?

Wind information can be reported by various sources (ATIS, METAR, TAF, spoken on the radio, etc). I was taught that officially some of these sources are relative to magnetic north and others to true ...

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