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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5
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3answers
243 views

What is the best option when the headwind exceeds the maximum airspeed?

In a previous question, Mongo described flying his Cessna with a negative ground speed in a head wind. In this situation, what is the correct thing for a pilot to do, if there is nowhere to land ...
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0answers
43 views

What wind speed is needed for vertical take offs in fixed wing planes? [duplicate]

Is there a scale or guide to see the vertical take off and landing head wind speed requirements for each plane? How is this calculated?
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1answer
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What is wind “CALM”?

What is the exact criteria for wind speed to be considered "CALM". Different countries might have different values and i do not mind getting answers from those. But an answer from an ICAO annex would ...
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10answers
11k views

Is it possible to fly backward if you have really strong headwind?

Is it possible to fly a plane backwards if you have a really really strong headwind? I mean when you are aloft, you have positive airspeed and airflow over the wings but you have negative ground speed....
6
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1answer
190 views

What does “still air” mean when planning alternative airports?

When planning for a takeoff alternate, according to 14 CFR 121.617 (1) Aircraft having 2 engines. Not more than one hour from the departure airport at normal cruising speed in still air with one ...
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1answer
60 views

Identify a change in Altitude based on direction and WCA applied?

Question below is from study material for the EASA PPL license MET course. It's an unlikely question but it's interesting to review. You are flying from west to east with WCA +6°. How is your true ...
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2answers
651 views

Landing in very high winds

A few weeks ago, a storm passed through my area with winds reported at 55kt and gusting to 68kt. Many light planes managed to break their tie-down ropes and were flung around the ramp area, which isn'...
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0answers
266 views

What is the cause of this roll oscillation during BA492 go-around? [closed]

Earlier today, BA492 aborted a landing at Gibraltar due to a strong tailwind, according to this article. Videos of the go-around show the Airbus A320 undergoing pronounced oscillation in the roll axis:...
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1answer
331 views

How can I calculate which runway to use for landing, based on the wind? [duplicate]

I have a project where the user enters the name of the airport. We fetch the wind direction (degrees) for that airport. Then we use the wind direction and the data about the runways at that airport to ...
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1answer
112 views

Wind vs high altitude cruise [duplicate]

Yesterday I flew back from Tokyo down south against great head wind around 150kt at 34000’, the original flight plan was to cruise at FL240 for a while then climb up, but the captain decided to get up ...
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3answers
108 views

How is the effect of wind on arrival time handled?

If a commercial plane encounters strong tailwinds, would the pilots set the autopilot for a fixed arrival time (if that is possible), or would it be ok to arrive way ahead of schedule? I imagine ...
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2answers
115 views

How do engines cope with various intake airflow speeds?

On a recent trip out of Washington Dulles to San Francisco, our B777 met with 200+ mph headwinds (as per the passenger entertainment system) at 35,000 ft for the first half of the route, before ...
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0answers
104 views

How does wind affect takeoff weight limits?

Two days ago I took off from BUR in relatively windy (although dry) conditions. Flightradar showed departure from runway 33, and winds were recorded roughly mid 20s kts from the N-NNE direction. ...
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3answers
146 views

Are winds that are not from the prevailing wind direction more often gusty, and why?

It seems to me that, looking at the ground weather forecasts (as opposed to, say, low level forecasts), it's far more common for the wind to be predicted to be significantly gusty when it is blowing ...
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1answer
341 views

Is extreme wind shear an official classification? Is it rare to land in 65kts headwind, gusting 95kts?

I was a passenger in an A340 during a famous storm 65kts gusting 95kts. Resulted in a go around, but the plane sunk quite fast several times. Is this rare? Are there limits to headwind component? The ...
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2answers
366 views

How do I calculate the required heading for an aircraft carrier with an angled deck to sail into the wind?

The natural wind is from 360 degrees at 10 knots. The desired relative wind down the angled deck is 10 degrees left of the ship’s heading at 30 knots. What heading and speed must the carrier go?
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2answers
119 views

Is drag higher when flying in a crosswind?

Is this true that during a flight with a crosswind the drag increases due to the fact that the relative wind blows at a certain angle to the aircraft's nose but not precisely in the opposite direction ...
2
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1answer
118 views

With wind, what will a perfectly circular flight path relative to the surrounding air look like from the ground? [duplicate]

Let's suppose that an airplane flying at a uniform airspeed follows a perfect, level, closed circular trajectory with respect to the mass of air. Now, seen from the ground, and in the presence of a ...
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4answers
173 views

Does the headwind component change noticeably when transitioning from a crab to a slip on short final?

I don't know if I'm overthinking this, but it has been causing a bit of confusion in my head. Knowing that the headwind component affects the angle of climb/descent, I was wondering how it affects ...
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8answers
26k views

How safe is the Boeing 737-800 in high winds?

I'm not good with flying. However, on Wednesday morning I'm flying from Gatwick to Bergen, Norway, traveling alone with two young children. I'm trying desperately to not show my kids how afraid I am ...
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3answers
766 views

Why does the angle of descent increase in a constant headwind while decreases in a sudden encounter with a headwind, in a descend?

I'm currently studying aerodynamics. I have realized that a sudden encounter with a headwind during descent will result in the aircraft generating more lift, thus angle of descent decreases. I haven'...
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1answer
199 views

What can cause a sudden jump in Indicated Air Speed?

My aircraft heading is 321 with constant Static pressure, wind speed and steadily increasing Ground Speed. Meanwhile, there was a sudden jump of 10kts in IAS from 140 to 150 kts withing a span of 1 ...
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1answer
3k views

Why is the flight duration of the same flight different in different months? [duplicate]

For example: CX880 (HKG TO LAX) takes 13h40m on the 2nd of August, but only takes 12h50m in September. CI008 (TPE TO LAX) is the same; it takes half an hour less in September than in August. What ...
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1answer
131 views

Why changes the lift during turning with sidewinds? Why is there relative wind in the wind-frame?

I started doing some simulations with XPlane and could observe a very interesting effect when doing turns in the presence of constant wind: All simulations are done with the XPlane Cessna 172 (?) ...
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1answer
392 views

Is the distance to PNR (point of no return) affected by wind?

Is the distance to PNR (point of no return) affected by wind? I did research it and found some links, but none discussed about the wind.
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3answers
908 views

Why is it 'aileron right and elevator up' with a front-right wind in a tailwheel airplane?

Question: How should the flight controls be held while taxiing a tailwheel airplane into a right quartering headwind? Answer: When taxiing a tailwheel airplane into a right quartering headwind, use ...
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2answers
377 views

Could a blimp maneuver using a sail? [closed]

How do you build a sail for a blimp/hybrid airship and what would it look like? Similar to a sail boat how could a blimp maneuver without propellers? Can a blimp sail against the wind? Wind can travel ...
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2answers
321 views

How would a low-airspeed fixed-wing drone be designed to reduce effects from gusts and wind shear?

In a story I am working on, the characters need a fixed-wing drone that can rendezvous with a blimp, where by "rendezvous" I mean "come within a very short distance at low relative airspeed". The ...
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0answers
50 views

If the speed of wind at ground is 200 kn, could an Airliner land vertically if it's course is opposite to the wind's direction? [duplicate]

I'm not a pilote and my field is programming, but I was thinking about that question: If the speed of wind at ground is 200 kn (just an example), could an Airliner land vertically (per reference to ...
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2answers
2k views

What are the effects of headwind strength on landing?

Assuming a direct headwind with zero crosswind component, what are the effects of landing into say a 10kt vs 30kt vs 50kt headwind? Are there any specific advantages or drawbacks to a stronger ...
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1answer
134 views

What is the relationship between mountain breeze and air pressure?

I am studying for my PPL and am having some problems understanding the mountain breeze phenomenon, especially when it comes to my understanding of pressure. Basically, I've read that during the day ...
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2answers
979 views

How do I calculate the landing distance in a landing chart with tailwind?

With the following chart I can calculate the landing distance with the headwind, gross weight and altitude. The charts uses headwind component, but how can I calculate the landing distance required if ...
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1answer
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Why do the jet turbines spin while the engines are turned off?

Why do the jet turbines spin while the engines are turned off? Is this as a result of the wind? Or are the turbines deliberately spun using the APU? If so what is the reason behind this?
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1answer
1k views

Do airplanes have a maximum headwind gust component when landing?

An aircraft POH generally gives a maximum demonstrated crosswind component but I have not seen any indication with regards to maximum gust component. I understand that one is supposed to increase the ...
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2answers
496 views

Does wind provide lift for hang gliders in the air?

Basically, if there are no thermals, but a strong wind, is there a way to use that wind to gain altitude?
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1answer
2k views

Do I use true or magnetic north in headwind component calculations? [duplicate]

For the landing performance calculations, I want to calculate the headwind component. I can do this with the runway heading and the reported wind direction and speed. But do I need to make any ...
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2answers
414 views

What type of airspeed are wind speeds given in?

When you get wind speed from an ASOS/AWOS or from ATC, are those speeds in true airspeed? Are the instruments weighted for elevation? Say you're on approach to 05R at MEX and you're given wind speed ...
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8answers
3k views

Does a sudden drop of the velocity of the headwind affect the airspeed by lowering it?

I had a discussion about air speeds with one of my instructors recently. He is claiming that there is a sudden drop in the wind velocity as you get closer to the ground (which is absolutely true, due ...
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2answers
3k views

Why would a commercial flight be landing with a tailwind?

I just flew into BOS on flight 2539 and we landed either on 22R or 22L even though winds were 19 knots at 010 at the ground and 14 knots at 300 at 3000 feet. There was no change either; the captain ...
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1answer
1k views

On a calm day, what determines the active runway?

When the winds are "calm" or variable, and as such there is no wind direction on which to base the decision on what the active runway should be, how is that determination made?
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8answers
9k views

Why might an airliner fly a large U-turn before landing?

I was on a flight1 from San Antonio, TX to Toronto and, when arriving in Toronto, the plane went quite a way past the airport, made a big U-turn, and then landed. We were coming from the west. I ...
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2answers
2k views

Is it easier to take off against the wind or with it? [duplicate]

I was wondering if it would be better to take off into the wind because then you would need less overall acceleration to takeoff, or with the wind behind you - thereby making it easier for the plane ...
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4answers
2k views

Can this design provide more lift force than thrust from engine?

The problem is depicted in the picture: Generally, why we don't use engine blow wings to fly? Can we use wind-tunnel-like wing to generate lift force? Can it generate more lift than thrust? If it ...
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0answers
315 views

I need to know how to calculate drift with a Jeppessen CR-3. Can someone help?

In my exams we are not allowed to use E-6B, just a CR-3 jeppessen flight computer and I'm having serious issues calculating W/V from other parameters like TAS/GS and HDG/TRACK. Example: Q : Given: ...
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1answer
402 views

landing with east to west wind on runway 11/29 [duplicate]

i was wondering if anyone could help me out with this doubt i have. the kananga airport in dr congo has a single runway labelled 11/29. upon checking on google maps the number 11 is on the left end ...
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1answer
331 views

How can avionics detect tailwind? [duplicate]

We can see the effect of the tailwind on the plane's flight direction on the modern military fighter jet huds. I wonder about how can the avionic systems detect tailwind and which sensors using in the ...
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2answers
4k views

How is wind measured at this small U.S. airport?

While launching gliders at Front Royal, VA (KFRR) over the weekend, a fellow pilot and I got curious about the airport's weather equipment. We know that KFRR has local equipment to measure wind speed ...
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8answers
6k views

What happens if you take off with a direct tailwind?

What happens if you take off with a direct tailwind?
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2answers
790 views

How can seagulls slide in the wind without flapping their wings?

There are a lot of seagulls in a park near where I live. Sometimes I can see them somehow "sliding" forward or backward diagonally when flying against the wind, however, their wings aren't flapping. ...
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1answer
366 views

What is the constant in this formula for additional lift?

Let’s consider the case of a plane flying s/l in a headwind with a positive gradient. A wing produces lift by inducing a bound vortex superimposed on the relative wind., and in the particular case of ...