Questions tagged [taxiing]

The process of driving an aircraft on the ground, e.g. from the gate to the runway.

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Why does the Cessna 152/172 nose wheel turn only when the aircraft is moving?

According to the POH, ground control is achieved by a spring loaded steering bungee. But how does it work and why the nose wheel does not move when the aircraft is stationary?
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How Do Airline Pilots Park Right on the Line? [duplicate]

I’m sitting here at the airport waiting on my flight and I’ve always wondered: how do airline pilots park those big birds (737s and above in size. I can understand smaller regional jets where you’re ...
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What is the best way to move a touring motor glider over a wet grass surface?

In a flight club we operate an SF-25C (about 480kg empty). In fall and winter the surface (grass) of our taxiways often gets to wet so if we would move the aircraft we would damage the field and we ...
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What does it mean when a hold short sign is out of service?

I prepared for "SELCAL" exam and in one of the routes I heard such information as RW 32 hold short sign at TWY L is out of service. I just don't understand this phrase. I appreciate it if ...
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Does center of gravity change between ramp weight and takeoff weight?

Most documentation gives percentage weight distrubtion between main and nose gear for ramp weight. I'm curious if this weight distribution would be the same for takeoff weight.
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5 votes
2 answers
270 views

Pilots use of the term "with" then a letter when talking to ground [duplicate]

In ground comms when taxiing a pilot may say for example: "Kennedy ground, DELTA412 HEAVY, is in KILO-FOX, short of ALPHA with PAPA". I get that this means they waiting a KF exit of the ramp ...
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3 votes
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Does lack of a curved taxi-line indicate a turn is not permitted?

Does the lack of a curved taxiway centerline between two taxiways indicate that a turn is not permitted? Take for example the complex of taxiway connections at KATL here: 33.636153, -84.421919 (see on ...
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2 votes
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Why is taxiing super slow after an ILS CATIIIB landing in almost zero visibility?

I have experienced my very first ILS CAT IIIB automatic landing at my own home airport Lucknow (VILK). I'm super excited but also have myriads of questions related to many unique procedures I saw ...
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56 votes
8 answers
11k views

Why don’t airplanes use turn signals?

Why don’t airplanes use turn signals like cars do? Would this improve safety for ground operations at uncontrolled airports? Could a similar concept be used to indicate in air maneuvers? For example: ...
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26 votes
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Are there any drawbacks to requesting progressive taxi every time?

Unless you know the airport like your own backyard, it seems like requesting progressive taxi would always be the safest option to essentially eliminate the possibility of taking a wrong turn or ...
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How serious is the problem of "stopping too far" next to the jet bridge?

In the answer to the recent question "How does an airliner adjust ...", there is the mentioning of the signal: "STOP TOO FAR". But what to do if you see this? In other words, if ...
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Has there been any attempt to use an underground cable system, a la a cable car, to tow aircraft along taxiways? [duplicate]

I've been looking at some proposals to try to reduce the time that an airliner's main engines are run at idle or near idle when taxiing to and from runways--a situation that uses non-trivial amounts ...
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3 answers
221 views

Taxi to spot?? Hot spot? What is meant by this?

I heard ground controller at KPHL say taxi to spot so and so? What do they mean by this during taxi procedures.
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25 votes
2 answers
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How can this kind of confusion about taxi instructions occur?

A few days ago, I (a student pilot on a solo) had landed on runway 9 for a full stop taxi back. The taxi instructions were "alpha to 27 remain on this frequency". I missed some words in between these ...
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How does ATC direct aircraft on ground from the parking to the runway?

For medium size airports, ATC will direct aircraft with a single message like this "Taxi to runway 29 via Papa, Sierra". I was wondering if it was the same thing for bigger airports (like ...
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5 votes
2 answers
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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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11 votes
3 answers
4k views

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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4 votes
1 answer
598 views

Why is engine #1 still used when taxiing with one engine?

According to the answer in this post Taxiing with one engine: Is engine #1 always used or do they switch? Engine #1 is used because it pressurizes the green HYD system which powers the Nose Wheel ...
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2 votes
1 answer
432 views

Where are "standard taxi" instructions published? [duplicate]

Example: at KATL (Atlanta), the ground control sometimes gives taxi instructions as "standard taxi"; Where is that defined? Delta 2732 27-Right Lima Charlie "Standard Taxi." In that case, from a ...
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2 answers
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How much thrust is applied in a 737 to achieve taxi speeds?

I'd imagine not much, but maybe none? I wouldn't be surprised if the plane moves forward without brakes alone.
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8 votes
3 answers
2k views

When can a taxi clearance allow me to cross multiple runways?

I was just reading the FAA instrument procedures handbook and saw the paragraph below in Ch 1. I'm puzzled by this, because I routinely get "Cross runways XX right and XX left on Alpha" as part of my ...
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2 votes
1 answer
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What is the difference between "Bay" and "Stand"?

When should we use the word Stand and when Bay for ATC taxi clearance?
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7 votes
1 answer
620 views

Why does taxiing produce large lateral loads on the 747's engine pylons?

While reading through a bunch of old AARs recently, I found (in the context of a 1993 747 in-flight engine separation) this interesting tidbit: [...] Boeing engineers report that the modifications ...
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7 votes
2 answers
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How are the 747-400 rudder pedals and tillers connected to the nose wheel?

The Boeing 747-400 Before Taxi Procedure says (emphasis mine): [...] Flight controls .............................................. Check C [...] Hold the nose wheel tiller during rudder check to ...
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5 votes
1 answer
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Is an F-16 able to fire any of its weapons while on the ground? [duplicate]

I can recall at least one Hollywood movie, where this takes place (although not an F-16 in the movie). Is this at all possible? Can the F-16 fire its M61 while taxiing on the ground? What about other ...
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2 votes
0 answers
194 views

Do visual docking systems improve safety?

Are there any studies that shows A-VDGS (Advanced Visual Docking Guidance System) is improving the safety of aircraft movements on airports?
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2 answers
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Does taxiing in London City (LCY) happen on the runway?

I recently had a ride to LCY (London City). Awesome, by the way. They have only one runway (09/27) and no apparent taxiways. (Source: Google Maps) After landing, how do the aircraft get from the ...
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10 votes
1 answer
623 views

Is the taxi route omitted in low visibility (LVP)?

This video shows an auto land into Schiphol during bad weather / LVP (Low Visibility Procedures). After reporting vacated, the ATC instruction is quite short (around 2:45). Simply the gate number. (I'...
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27 votes
4 answers
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Why are thrust reversers not used to slow down to taxi speeds?

In reading this question (Would more throttle when using reverse thrust reduce stopping distance?), it prompted me to remember that on many of my flights (typically on 737s or CRJ type aircraft), it ...
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2 votes
1 answer
379 views

How to correctly interpret the taxi procedures in ICAO Doc 4444?

I have a question to ICAO Doc4444, Chapter 12.3.4.7, Taxi procedures for departure, c). My question is how to interpret the following, knowing that words in parentheses are mandatory, and words in ...
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1 answer
299 views

What causes the nose landing gear knocking noise on a Boeing 777 while taxiing?

The NLG knocking noise heard on taxi-in to stand, what could cause this knocking noise?
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6 votes
1 answer
297 views

NOTAM - What means "no shoulders along taxiways" in German?

can anyone explain to me what "no shoulders along taxiways" means? I know what shoulder markings are, but I don't know how to translate them. Are there German people? :) Thank you!
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19 votes
2 answers
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What do these white on red words indicate on a London Heathrow taxiway chart?

What do the words in white block capital letters over a red background denote on this aerodrome chart of LHR?
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18 votes
2 answers
4k views

Why is aircraft marshalling still necessary?

I've seen in a documentary that many airports have people guiding the airplanes to the parking spots (marshals). I've also noticed that the key point is to reach a precise spot on which the nose ...
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0 votes
4 answers
256 views

How to achieve shorter taxiing time by elongating the airfield

What about doubling the length of airfields in order to shorten the time it takes for a plane to roll on the ground after landing and before takeoff. The plane could take off from the middle of the ...
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14 votes
2 answers
2k views

Are taxiways numbered in a predictable order?

When taxiing at an airport without a full-blown airport diagram (most commonly, a non-towered airport), how does a pilot know whether taxiway A (Alpha) is on one end of a runway, or the other? Or, in ...
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2 answers
612 views

Why are "Follow Me" cars painted yellow and black?

Why are "Follow Me" cars painted black and yellow, and use square shapes in their design?
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1 vote
1 answer
555 views

How do aircraft follow the tarmac lines while taxiing? [duplicate]

How does the pilot determine he is on the yellow taxi line at all times, since he doesn't have a direct view to the ground below? I am sure there must be some equipment, but I just don't know what.
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8 votes
2 answers
2k views

How does an airplane move itself in the runway? [duplicate]

Basically do they move themselves using their powerful jet/propeller engines to propel themselves forward or do they just use an engine that powers the wheels used for landing? I'm not really asking ...
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17 votes
2 answers
5k views

Why so much ground time at Frankfurt Airport?

Disclaimer: Total layman here. I frequently fly into and out of Frankfurt Airport (FRA) with regional jets (flight time advertised as 45 minutes) and one thing that everyone is always annoyed about ...
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1 answer
426 views

Why are follow-me cars used in Gran Canaria Airport in good visibility for incoming aircraft?

I've been at GCLP (Las Palmas de Gran Canaria, Spain) a few weeks ago. I've observed that all incoming traffic was guided by a Follow Me while outgoing traffic went without one. I was curious about ...
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0 votes
4 answers
3k views

Where in the FAR or AIM is a high speed taxi defined?

While monitoring coms I recently heard a Cessna Centurion that had just cleared the runway request a "high speed taxi", which was approved by the tower. I'm assuming that means he wants to taxi at a ...
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4 votes
2 answers
1k views

Why don't pushback tugs take the aircraft to the runway? [duplicate]

As we know aircrafts have to turn on their engines to taxi the entire way to the runway, if pushback tugs are used, it would save a lot of ATF and overall costs. Is there any specific regulation by ...
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13 votes
1 answer
363 views

Does the "follow" instruction give an aircraft clearance to turn onto a taxiway and/or cross a runway?

Consider this ATC instruction from a ground controller: N123, continue down Alpha, turn right at Kilo, hold short of RWY36. N456, follow N123. Does this instruction mean N456 can turn right ...
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18 votes
2 answers
2k views

What are the most challenging taxi manoeuvres that a typical commercial airline pilot must execute?

I am currently involved in a University level modelling excercise which looks to investigate the handling qualities of a novel nose wheel steering system. As part of this study, I am interested in ...
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5 votes
1 answer
392 views

Any FAA or other regulations prohibiting taxiing between parked aircraft?

So the other day I was getting checked out at a local FBO, after returning to the ramp, instructor told me to taxi between two parked (tied-down aircraft). It was a tight squeeze but I taxied at about ...
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18 votes
1 answer
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Are there any aircraft with powered landing gear?

My student asked me a question this morning. It was: A car drives by turning its wheels against the Earth. An airplane taxis by rolling on its wheels while the engines push against the air. Are ...
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7 votes
2 answers
1k views

What is the purpose of this loop in a taxiway?

This image is of Mariscal Sucre International Airport near Quito, Ecuador. (Official site / in English) What is the purpose of the loop in the taxiway plainly visible in this image? From Google ...
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  • 1,709
6 votes
2 answers
601 views

How should you coordinate with traffic at non-towered airports?

I am a fairly new pilot. I recently flew to a non-towered airport in Quebec, Canada (Lachute, CSE4). There is a significant displaced threshold on each end of the runway. The airport has one taxiway ...
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1 vote
0 answers
48 views

What is the permissible deviation for a pilot to stop the aircraft when guided by AVDGS?

As per ICAO Annex 14, table 5-4, the permissible deviation for AVDGS is 500mm at stop position, which is the design requirement for AVDGS unit. I would like to know what is the permissible deviation ...
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