Questions tagged [runways]

A runway is a "defined rectangular area on a land aerodrome prepared for the landing and takeoff of aircraft" (ICAO definition).

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5answers
4k views

Would it be possible to put wind turbines alongside runways that are driven by the exhaust of planes?

The only thing somewhat similar that I could find is research from students to use air vents from factories. This is of course a much lower force to deal with. I'm curious if someone could give some ...
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Gain Extra force from Weight in Slopped Runway [duplicate]

No doubt that skiing sports is great especialy when your weight is the main force which speed up your motion in snow. I was asking myself, why we don't use the same concept for huge planes & ...
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Why did KJFK keep using runways 22R/L here instead of switching to 13R/L?

In this YouTube video, one can see the arrival at KJFK, holding patterns, and eventual diversion to KPHL of LH400, an A380. When LH400 arrives in the New York area, the pilots request the use of ...
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8answers
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Minimum number of runways required for international airports?

What is the minimum number of runways required for an International Airport to be operational - commercial aviation? Would two runways suffice?
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1answer
495 views

Are there specific surface requirements prior to an ILS Category 2 runway approach threshold to ensure the accuracy of the Radio Altimeter derived DH?

ILS Category 2 approaches use a Radio Altimeter (RA) derived DH (Decision Height). An RA measures the aircraft height directly above the surface immediately below the aircraft. Any sloping terrain, ...
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1answer
284 views

Has the infamous Sao Paulo runway been made longer or replaced meanwhile?

The TAM 3054 accident occured because the pilots were stressed by the fact they needed to land on a not-so-long runway where an incident occured a day before. This stress has lead the pilots to forget ...
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1answer
692 views

What's this turquoise stuff covering the overlap between the blast pads of KBOS runways 04L and 09?

Although runways 04L/22R and 09/27 at KBOS stop just short of intersecting, the blast pads for runways 04L and 09, which continue some distance beyond the ends of the runways proper, do intersect. ...
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3answers
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What, exactly, is a final controller?

This http://www.xavius.com/ordapp.html tutorial mentions the user work song as a final controller for two runways and says that during busy periods one controller would work each runway. I’ve never ...
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1answer
188 views

What is the minimum runway surface friction coefficient?

After calculating the friction coefficient for an asphalt runway pavement through a test, how to know if it’s acceptable or not? In other words, hat is the lowest acceptable value for friction ...
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Can a stopway withstand thrust of B737 engines on takeoff if the aircraft is lined up on the edge of the runway?

Can the thrust of Boeing 737-300 engines break the asphalt surface of a stopway marked with yellow chevrons? Can anyone give a documented reference?
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What is the rationale behind placing arrestor gear on a long runway?

I'm looking at the obstacle chart and the aerodrome chart (pdf; source: Hellenic Civil Aviation Authority) for LGLM (Lemnos, Greece), which serves both military and passenger aircraft. The runway ...
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Why would an airport use an L/R runway combination and a second number instead of L/C/R?

At KPHX, there's a Runway 25L/R and a runway 26. What would the reasoning be for using this instead of what seems to be the more common L/C/R designation?
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Is the longitudinal extremity of an obstacle limitation surface based on the threshold or the displaced threshold?

In a case where a displaced threshold (DTHR) is present, should the longitudinal extremity of the obstacle limitation surfaces (for example, the conical surfaces) be counted from the threshold (THR) ...
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How can a touchdown zone RVR report for one runway be different than the rollout report for the runway going the opposite direction?

I saw an RVR report in KSEA where 16C was 800 1200 1800 (touchdown zone, midpoint, rollout), and 34C was 1800 1200 300. I always thought the same scatterometers used for the rollout side on runway as ...
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1answer
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How to estimate runway length for airport master planning?

I use the manufacturer aiport planning manuals. But they are incomplete (unless for Boeing). Airbus and Embraer for example, only present range X weight charts for MTOW. Is there a free (or affordable)...
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What is the best time to run runway friction tests? [closed]

When is the best time to run runway friction tests? And what is the optimum temperature to run them?
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When does the ATC assign runways to aircraft arriving at an airport?

I want to know how far from the airport runways are assigned. Approximately how many nautical miles away or typically how many minutes before landing would the pilot know which runway they'd be ...
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3answers
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Why might a too-wide runway be a problem?

In the September 2020 issue of EAA's Sport Aviation, Budd Davisson writes Runway width becomes a problem for some taildraggers when it gets to be less than 35-40 feet because of the lack of ...
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1answer
154 views

Could a wing be designed to exploit both normal flying and ground effect?

Ground Effect planes' wings are stubby and the height over the ground or water is limited to wing span. Could a wing be designed to exploit both normal flying and ground effect together to give the ...
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2answers
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How can pilots differentiate runways and taxiways during landing?

There have been many incidents where pilots landed or attempted to land the aircraft on a wrong surface (for example Continental 1883 and Air Canada 759). Are there any tips for pilots to avoid that? ...
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1answer
550 views

Are aircraft pilots required to fly runway heading for a certain distance?

If an aircraft rotates off the runway relatively quickly (runway mid-point for example), do pilots need to continue on the runway heading for a minimum distance before turning based on departure ...
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How can I read airport maps when choosing a seat as a passenger?

When I choose seats on an airplane, I usually go for a window seat since I love the view, especially the views of a city on takeoff/landing. Sometimes I get good a view of the city and sometimes I ...
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2answers
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Do most airport use one and only one runway for landing?

Do most airports (especially busy ones) use only one runway at a time for landing? For example, I know Heathrow uses only one of its runways at a time (although they might switch to another half way ...
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Why is crushable-block EMAS the only overrunning-aircraft-stopping system in wide civilian use?

Because runway overruns often end badly, and many runway ends (especially older ones) don’t have enough clear space available beyond the runway end for a full-size runway safety area (RSA), EMAS has ...
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Why do so few non-US runways have EMAS beds?

As occurrences of an aircraft running off the end of the runway and hitting things tend to leave both the aircraft and whatever it hits rather the worse for wear, much effort over the years has gone ...
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2answers
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What is the difference between stopbars and Intermediate Holding Position Lights?

I know that stop bars continuously light red and stand at before taxi route joint, holding points, or at the runway entrance, but what about the Intermediate Holding Position Lights? How can we ...
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1answer
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How can I determine the runway number from its true bearing and magnetic variation? [duplicate]

Given: Runway True Bearing 007° Magnetic Variation 4°E What is the runway number (or designator)?
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3answers
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What is the name of the movement which is carried out by plane beginning from the runway and ending at takeoff?

What is the name of the movement which begins after the plane lines up on the runway and takeoff clearance is received, and ends when the plane lifts off from the runway? Is it also called as 'taxiing'...
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1answer
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Why is Tromsø Airport's runway 01 referred to as 36 in the sign before the runway?

Runway designations can change due to the changing direction of the magnetic north. Using Google Earth, we can verify that Tromsø Airport's runway 01 has not changed its designation since at least ...
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2answers
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Are intersection takeoffs less common in the USA than in other countries?

On a recent trip through Australia I did a number of intra-oz flights. In at least three of the cases we performed intersection takeoffs, a couple at MEL/YMML and one at BNE/YBBN. I have at least a ...
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2answers
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Should I wait for Tower to provide runway exit instructions?

This is somewhat already answered here (Is it a flight violation to mishear ATC instructions for exiting the runway?), but this question is more geared toward taking action before hearing from Tower. ...
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2answers
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"Gross" and "net" planned runway length for the Haifa airport

My city's mayor was just boasting on how she'd gotten an approval for an airport runway of length "2100 m gross, 1900 m net length", and that this would be enough to connect the city - Haifa - to hubs ...
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Why do airports have directional runways instead of a large area to operate in any direction?

Instead of a few runways in a few directions, why not have a large square block of asphalt so that planes can take off and land in any direction? Where and on what direction planes land and take off ...
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3answers
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Why isn't runway 4L/22R at KMDW available as an emergency runway?

Chicago-Midway (MDW/KMDW) has five runways, oriented along the diagonals of the square airport. The longest two (13C/31C [1988 x 46 m] and 4R/22L [1964 x 46 m]) are ILS-equipped, and serve as the ...
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2answers
232 views

Could sprinkling cool water on the runway in hot summer decrease air density?

Why is there no such technique used where cool water gets sprinkled on a runway? Cooling down the air above the airport would decrease air density and therefore lead to a shorter starttime for ...
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1answer
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Why is it runway "1" instead of "01" in America?

In the case of a runway with a magnetic heading of 10° in America the runway number ("1") isn't hugely distinguishable from the runway centreline IMHO, (for example see Washington Airport and San ...
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1answer
190 views

How long did it take to set up a portable runway? [closed]

How long did it take to set up those metal runways? Were the metal sheets spiked into the ground? How big were they? Also, how are commercial runways built?
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4answers
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Why do airports in the UK have so few runways?

Almost all of the major airports in the United Kingdom are single-runway (or functionally-single-runway) installations, with only two of the very busiest (Heathrow and Manchester) having as many as ...
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1answer
429 views

Close Runway 16/34 from one direction

Let's say Runway 16/34 used direction 16 for arrival and 34 for departure. Can the runway close 16 (arrival direction) and still working in 34 for departure?
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Are there any real life instances of aircraft aborting a takeoff or landing to avoid a vehicle?

I came across a fake video of an A380 closely avoiding a fuel truck. More details at Snopes including a link to the YouTube video. While this video is not real, I'm interested in finding out if it's ...
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1answer
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What does this indication of '10∼15 degree' that points toward the both edge of runway means?

While I study FAR AIM, 2-1-1 approach light system, I saw this indication (on the left side) that I couldn't guess what it tried to demonstrate. It seems like runway end identifier lights, but I can'...
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1answer
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How Does the FAA Define the Dimensions of the Touchdown Zone?

Does the FAA give a regulatory definition of the term "Touchdown Zone" for use within the context of landing operations? In 14 CFR 91.175 the FAA requires—in certain cases—that pilots must ...
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What is the area between the taxiway and runway shown in the picture below?

Is this the Arresting area? I'm not too sure what you call this area
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1answer
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Why can't some airports handle heavy aircraft while others do it easily (same runway length)?

As I've seen in this video, they operate flights from Bournemouth airport all the way to Barbados on a Boeing 787-8. As Bournemouth runway length is 2,271 m (7,451 ft), it can handle aircraft such as ...
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7answers
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Can two aircraft be allowed to stay on the same runway at the same time?

My understanding is that the runway should always be cleared, and occupied by no more than a single aircraft for takeoff and/or landing at any given time. Is there any scenario in which ATC can ...
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What will be the immediate action by the pilot and ATC if any plane blocks the runway while landing?

Suppose, if the Airport has only one runway and one plane is trying to take off at the end of the runway and other plane trying to land from the other end of the runway. Due to any reason if the ...
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1answer
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How many US airports have 4 or more parallel runways?

Which airports in the US have four or more parallel runways? How many are planning additions in the next 5 years? A few years back, 10 years, Charlotte opened their 3rd parallel runway and it was ...
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1answer
184 views

Why can some runways only be used from one end?

Is there any reason for why some runways can only be landed and taken off from one end and not the other, even though there aren't any obstructions (mountains, etc.) and apparently can be used from ...
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1answer
10k views

Why are Gatwick's runways too close together?

Gatwick Airport has two runways (08L/26R and 08R/26L), but they are only 200 metres apart - too close (by just ten metres) to allow simultaneous operations on both runways. As a result, usually only ...
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9answers
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Why don't short runways use ramps for takeoff?

Say you had a runway for light aircraft, but only 700 meters or so of runway. Wouldn't it help to end the runway with a ramp that is ~40 meters above ground and slightly facing the sky at a gradient ...

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