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What's The Speed Limit At Airports?  
User currently offlineCoolGuy From United States of America, joined Jan 2005, 414 posts, RR: 0
Posted (7 years 4 months 2 weeks 6 days 4 hours ago) and read 26100 times:

Suppose an aircraft is on a straight taxiway in clear weather with no other aircraft around at JFK. What's the maximum speed?

66 replies: All unread, showing first 25:
 
User currently offline2H4 From United States of America, joined Oct 2004, 8955 posts, RR: 60
Reply 1, posted (7 years 4 months 2 weeks 6 days 4 hours ago) and read 26187 times:
AIRLINERS.NET CREW
DATABASE EDITOR



In many cases, the maximum taxi speed is governed by the individual company's ops manual. I know of one that calls for taxi speeds not to exceed that of a "brisk walk". Actually limiting taxi speeds to a "brisk walk", of course, would grind things to a halt at congested airports...so in reality, the limitation is largely ignored for the sake of operational efficiency.


2H4





Intentionally Left Blank
User currently offlineKELPkid From United States of America, joined Nov 2005, 6337 posts, RR: 3
Reply 2, posted (7 years 4 months 2 weeks 6 days 3 hours ago) and read 26157 times:

As 2H4 pointed out, the literal wording is "taxi no faster than a man can walk," however in reality you will hold up the show if you taxi that slow  Smile There's some give and take, but should you taxi too fast and cause an accident during a ground movement by taxiing too quickly, well, that's your ticket and your pride that are on the line  Wink

I suppose with GPS you can actually gauge your groundspeed these days, however the airspeed indicator will always read "0" (except when taxiing into a strong headwind  Wink ). I remember one night landing at TTD (Troutdale, OR) with a very strong wind straight down the runway. After an incredibly short landing (we made the first taxiway exit  Wink ), the airspeed in the 172 was reading 40 knots...and taxiing back was a royal pain in the rump because the plane wanted to weathervane into the wind (good time for remembering how to hold the controls while taxiing in a strong wind!).



Celebrating the birth of KELPkidJR on August 5, 2009 :-)
User currently offlineCptspeaking From United States of America, joined Apr 2006, 639 posts, RR: 1
Reply 3, posted (7 years 4 months 2 weeks 6 days 3 hours ago) and read 26127 times:

Are you WN or any other airline?  spin 

(disregarding the hypothetical location)

Your CptSpeaking



...and don't call me Shirley!!
User currently offlinePhilSquares From , joined Dec 1969, posts, RR:
Reply 4, posted (7 years 4 months 2 weeks 6 days 3 hours ago) and read 26130 times:

Generally, you'll find most companies limit taxi speed on long straight taxiways to between 20-25 knots. I do know of some airlines who monitor excessive taxi speeds and use the DFDR to ensure compliance.

On the 744/747 90 degree turns with full tiller are limited to 10 knots.


User currently offlineStealthZ From Australia, joined Feb 2005, 5667 posts, RR: 45
Reply 5, posted (7 years 4 months 2 weeks 6 days 2 hours ago) and read 26084 times:
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Quoting KELPkid (Reply 2):
man can walk

Generally considered to be approx 4MPH or 6.4KPH.
DOM2 at SYD to holding point T6 RWY 34R is approx 4.5KM, at walking pace would comprise 45min or so of a 1hr 25min block time(SYD-BNE), walking pace I don't think so!

I do understand how that walking speed restriction would (and likely should) apply in the ramp area though!

Cheers



If your camera sends text messages, that could explain why your photos are rubbish!
User currently offlineConcordeBoy From , joined Dec 1969, posts, RR:
Reply 6, posted (7 years 4 months 2 weeks 4 days 9 hours ago) and read 25816 times:

I know MSY's management has jokingly threatened WN with speedbumps in the past...

...and on the opposite end of the spectrum are AA's S80s.


User currently offlineZkpilot From New Zealand, joined Mar 2006, 4798 posts, RR: 9
Reply 7, posted (7 years 4 months 2 weeks 1 day 5 hours ago) and read 25660 times:

Quoting 2H4 (Reply 1):


In many cases, the maximum taxi speed is governed by the individual company's ops manual. I know of one that calls for taxi speeds not to exceed that of a "brisk walk". Actually limiting taxi speeds to a "brisk walk", of course, would grind things to a halt at congested airports...so in reality, the limitation is largely ignored for the sake of operational efficiency.

maybe on the apron... out on the taxiways especially for a long taxi that would take forever! 3000m! I'd say most planes taxi around at about 25km/h (15mph) but often faster or if busy then slower.



56 types. 38 countries. 24 airlines.
User currently offlineJETBLUEATASW From United States of America, joined Feb 2007, 56 posts, RR: 0
Reply 8, posted (7 years 4 months 1 week 4 days 12 hours ago) and read 25503 times:

I agree that the average speed limit is about 15-20mph. If u fly jetblue, the mapquest channel allows u to view that kind of stuff. Last time i flew Jetblue in August 2006, the taxi speed was 20mph if i recall correctly


"DO ME A FAVOR WOULD YA, THE NEXT TIME U LAND A PLANE ON MY STRIP, BONE UP ON YOUR MORSE CODE"-Tom Berenger
User currently offlineEridanMan From United States of America, joined Dec 2005, 121 posts, RR: 1
Reply 9, posted (7 years 4 months 1 week 4 days 10 hours ago) and read 25473 times:

Its funny actually, as a student who is just a few hours from my checkflight, I commented to my instructor the other day that throughout the whole learning process, we never formally touched on 'taxi speed'.

He laughed and said it was one of those things where, really, you just kinda have to 'feel' it. On a ramp? Absolutely no faster than someone can walk... Taxi to the end of a 5200 foot active in a spam-can? you can be the tower appreciates maintaining a reasonably brisk clip...

I think the term 'Reasonable and Prudent' is probably the best descriptor of Taxi speed limits, for any aircraft.


User currently offlineBlackbird From , joined Dec 1969, posts, RR:
Reply 10, posted (7 years 4 months 1 week 4 days 9 hours ago) and read 25446 times:

PhilSquares,

Which airlines are really so anal about taxi speeds that they actually check the DFDR to ensure compliance?

Andrea K


User currently offlineTheSonntag From Germany, joined Jun 2005, 3473 posts, RR: 29
Reply 11, posted (7 years 4 months 1 week 2 days 20 hours ago) and read 25321 times:

Just sit in a Ryanair plane... I think they beat all others on that term  Wink

User currently offlinePhilSquares From , joined Dec 1969, posts, RR:
Reply 12, posted (7 years 4 months 1 week 2 days 20 hours ago) and read 25315 times:

Quoting Blackbird (Reply 10):
PhilSquares,

Which airlines are really so anal about taxi speeds that they actually check the DFDR to ensure compliance?

It's not a matter of checking but the software in the DFDR will record an event and it's sent via ACARS and the DFDR is then analyized to see what the event was. I can think of several airlines that monitor taxi speed and virtually all airlines that have current generation aircraft have a Flight Data Analysis Program or a program extremely similar.


User currently offlineBlackbird From , joined Dec 1969, posts, RR:
Reply 13, posted (7 years 4 months 1 week 2 days 2 hours ago) and read 25225 times:

What airlines monitor taxi speeds? (Instinctively you'd figure people would have better things to do than monitor the taxi speed)

Andrea K


User currently offlinePhilSquares From , joined Dec 1969, posts, RR:
Reply 14, posted (7 years 4 months 1 week 2 days 2 hours ago) and read 25213 times:

Quoting Blackbird (Reply 13):
What airlines monitor taxi speeds? (Instinctively you'd figure people would have better things to do than monitor the taxi speed)

Andrea K

As I discretely tried to write, all airlines that have a FOQA, or some other program will monitor taxispeed. Even things like N1 are monitored while taxying. It's all electronic and requires no effort......


User currently offlineWing From Turkey, joined Oct 2000, 1559 posts, RR: 24
Reply 15, posted (7 years 4 months 1 week 2 days ago) and read 25202 times:

Quoting Blackbird (Reply 10):
PhilSquares,

Which airlines are really so anal about taxi speeds that they actually check the DFDR to ensure compliance

More than you can imagine,if we think about many aviation accidents occur on the ground rather than in the air.Actually not only the taxi speeds but all stages of the flight is monitored by the "big brothers" and our training department issues memorandums about the mistakes.This is particularly useful against some pilots who constantly disobeys the SOP standards.



Widen your world
User currently offlineLegoguy From United Kingdom, joined Jun 2006, 3312 posts, RR: 40
Reply 16, posted (7 years 4 months 1 week 1 day 21 hours ago) and read 25186 times:

What's the taxi speed limit when turning off the runway onto a fast exit taxiway (taxiway with a small angle between the runway)?


Can you say 'Beer Can' without sounding like a Jamaican saying 'Bacon'?
User currently offlineOly720man From United Kingdom, joined May 2004, 6666 posts, RR: 11
Reply 17, posted (7 years 4 months 1 week 1 day 20 hours ago) and read 25176 times:

I was once talking to someone at MAN and he said the police had clocked RYR planes doing 50 or 60mph (the speed check presumably out of curiosity). Time is money, I suppose.


wheat and dairy can screw up your brain
User currently offlineBlackbird From , joined Dec 1969, posts, RR:
Reply 18, posted (7 years 4 months 1 week 1 day 17 hours ago) and read 25151 times:

Phil Squares,

I take it Southwest, and Ryanair don't check taxi-speeds? :p


User currently offlineTheCol From Canada, joined Jan 2007, 2038 posts, RR: 6
Reply 19, posted (7 years 4 months 1 week 1 day 12 hours ago) and read 25105 times:

Quoting 2H4 (Reply 1):
I know of one that calls for taxi speeds not to exceed that of a "brisk walk".



Quoting KELPkid (Reply 2):
"taxi no faster than a man can walk,"

WestJet defines "walking speed" as 6km/h. Mind you, that usually applies to ground staff (ie. push-back) rather than the plane itself. Transport Canada regulations state that no vehicle an exceed 25km/h on the apron. Again, that may differ from aircraft movement regs.



No matter how random things may appear, there's always a plan.
User currently offlineBlackbird From , joined Dec 1969, posts, RR:
Reply 20, posted (7 years 4 months 1 week 1 day 12 hours ago) and read 25097 times:

PhilSquares,

I more accurately meant to say which airlines actually care a lot about taxi speeds, btw

Andrea Kent


User currently offlinePhilSquares From , joined Dec 1969, posts, RR:
Reply 21, posted (7 years 4 months 1 week 1 day 4 hours ago) and read 25031 times:

Quoting Blackbird (Reply 20):
PhilSquares,

I more accurately meant to say which airlines actually care a lot about taxi speeds, btw

Andrea Kent

If an airline has a FOQA (or similar) program they can set whatever threshold they want for excursions. For example, stabilized approaches are a big one. So, at my airline, an excursion is when you're below 1000' AGL, gear is not down, or flaps aren't in the landing position and EPR is not 1.01 or above. You will get a letter from the FOQA people asking if you can remember what happened on this flight and this date. In addition, you get a print out of about 3 minutes worth of data.

As far as what airlines care about taxi speed, I'd day all do. It's spelled out in the SOP. Perhaps WN and FR have higher taxi speeds in their SOP. It's not something that comes directly from the aircraft manufacturer.


User currently offlineBlackbird From , joined Dec 1969, posts, RR:
Reply 22, posted (7 years 4 months 1 week 15 hours ago) and read 24962 times:

So all airlines pay attention to it?

Andrea


User currently offlineTheSonntag From Germany, joined Jun 2005, 3473 posts, RR: 29
Reply 23, posted (7 years 4 months 1 week 9 hours ago) and read 24906 times:

Quoting Blackbird (Reply 18):
I take it Southwest, and Ryanair don't check taxi-speeds? :p

Maybe they order a minimum speed  Wink


User currently offlineBlackbird From , joined Dec 1969, posts, RR:
Reply 24, posted (7 years 4 months 1 week 5 hours ago) and read 24880 times:

I saw this file on Flightlevel350, taken inside a Ryanair 737-200 I think...

Man did they taxi like mad, I think they even had SWA beat by a margin...

Andrea K


User currently offlineGEG From United States of America, joined Oct 2004, 287 posts, RR: 0
Reply 25, posted (7 years 4 months 5 days 16 hours ago) and read 24991 times:

Does the weight of the aircraft have an impact on the speed it can taxi at, so would a higher weight lend itself to lower taxi speeds?

-Dan



Cant sleep...clowns will eat me...cant sleep...
User currently offlineBlackbird From , joined Dec 1969, posts, RR:
Reply 26, posted (7 years 4 months 5 days 12 hours ago) and read 25085 times:

So, PhilSquares, some airlines program in a lower threshold into the FOQA so that any speed which violates that restrictin will be logged and reported?

Obviously Southwest, Ryanair apparently have a very high threshold programmed in if any at all, or do not pay attention to it. Some airlines program in slower values and as a result pilots taxy slower to avoid getting in trouble correct?

Andrea K


User currently offlineBlackbird From , joined Dec 1969, posts, RR:
Reply 27, posted (7 years 4 months 4 days 7 hours ago) and read 25102 times:

Nobody?

Andrea K
Pi is approximately equal to 3.1415926535897932384626433897... (I think that's enough to get over the minimum amount of text to type my question)


User currently offlinePhilSquares From , joined Dec 1969, posts, RR:
Reply 28, posted (7 years 4 months 4 days 6 hours ago) and read 25095 times:

Quoting Blackbird (Reply 26):
So, PhilSquares, some airlines program in a lower threshold into the FOQA so that any speed which violates that restrictin will be logged and reported?

The airlines can put in any value they desire. If they don't want to monitor taxi speed, they don't have to. It's entirely up to the airline.

Remember, this is all done through the DFDR and ACARS. If there is an event threshold exceeded, ACARS will send the parameters and the DFDR will be downloaded at a later time. This doesn't require a lot of time and effort on the airline's part. The biggest deal is sanatizing the info so if it's published you can't trace who the crew was.


User currently offlineBlackbird From , joined Dec 1969, posts, RR:
Reply 29, posted (7 years 4 months 3 days 14 hours ago) and read 24996 times:

So, which airlines program in really low thresholds? I'm guessing here, but American, and Delta would probably be on the list eh?

In regards to which airlines don't program in thresholds, I'd say SWA and Ryannair would qualify eh?

Andrea K


User currently offlinePhilSquares From , joined Dec 1969, posts, RR:
Reply 30, posted (7 years 4 months 3 days 7 hours ago) and read 24995 times:

Quoting Blackbird (Reply 29):
So, which airlines program in really low thresholds? I'm guessing here, but American, and Delta would probably be on the list eh?

In regards to which airlines don't program in thresholds, I'd say SWA and Ryannair would qualify eh?

To be honest, those programs and their thresholds are pretty confidential among all the airlines. Even within an airline it's not something the pilots are aware of. Their only duty is to comply with SOP, if they do that then nothing happens.


User currently offlineBlackbird From , joined Dec 1969, posts, RR:
Reply 31, posted (7 years 4 months 2 days 17 hours ago) and read 24929 times:

Phil Squares,

If it's confidential, and pilots don't know about it... and you're a 747 pilot, how do you know about it? :-P

Andrea Kent


User currently offlinePhilSquares From , joined Dec 1969, posts, RR:
Reply 32, posted (7 years 4 months 2 days 17 hours ago) and read 24917 times:

Quoting Blackbird (Reply 31):
Phil Squares,

If it's confidential, and pilots don't know about it... and you're a 747 pilot, how do you know about it? :-P

Easy, I know people at other airlines who have been "debriefed" about their taxi speeds. For instance at SQ, stabilised approached are a very hot item. If you are slightly fast and stop at flaps 25, and then descend below 1000' and then select flaps 30, there will be an event reported for "late landing configuration". As a technique, especially with inexperienced pilots or during line training, I will tell them just to make the necessary adjustments for Vref and land with 25 flaps, which is an acceptable landing configuration. Then we'll debrief it on the ground. Although, I think the program has definite merits, in a situation such as I described, it really doesn't accomplish much. (my opinion only). I think a much better use for the program would to review the data and use it in recurrent simulator training.

If you're really bored in flight, you can go and see what the settings are for the FOQA program in the CMC reports. But, to be honest there are so many I just can't be bothered to remember them all. One I do know is a IVSI in excess of 600 fpm on landing, or a flare length of over 12 seconds (from idle stop to ground sensing).

My philosophy is if you fly the SOP, you won't get into any trouble at all. Has worked form me for over 30 years, no reason to change now.


User currently offlineBlackbird From , joined Dec 1969, posts, RR:
Reply 33, posted (7 years 4 months 2 days 15 hours ago) and read 24857 times:

How much trouble do you get into if you screw up?

User currently offlineInnocuousFox From United States of America, joined Dec 2003, 2805 posts, RR: 15
Reply 34, posted (7 years 4 months 6 hours ago) and read 24683 times:

I heard that in Germany, they can go as fast as they want.  Wink


Dave Mark - Intrinsic Algorithm - Reducing the world to mathematical equations!
User currently offlineWing From Turkey, joined Oct 2000, 1559 posts, RR: 24
Reply 35, posted (7 years 3 months 4 weeks 1 day 21 hours ago) and read 24621 times:

Quoting InnocuousFox (Reply 34):
heard that in Germany, they can go as fast as they want.

I think you are mixing Autobahns with airport taxiways...



Widen your world
User currently offlineMotopolitico From United States of America, joined Dec 2005, 212 posts, RR: 0
Reply 36, posted (7 years 3 months 4 weeks 13 hours ago) and read 24499 times:

Spotting at SDF in the middle of the night, I've noticed aircraft taxiing at a fair clip on the usually inactive diagonal runway. Since I would presume that active runways don't usually have a speed limit, would an inactive runway differ from a taxiway in that regard?


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User currently offlineNASOCEANA From United States of America, joined Jul 2005, 291 posts, RR: 0
Reply 37, posted (7 years 3 months 4 weeks 6 hours ago) and read 24455 times:

I once heard that pilots would purposely slow taxi during contract neogations to more clearly get their points across to upper management. Would this be true?


B777 greatest Airliner ever built!
User currently offlineLVTMB From United States of America, joined Oct 2004, 391 posts, RR: 0
Reply 38, posted (7 years 3 months 3 weeks 3 days 20 hours ago) and read 24300 times:

Last year I had to connect through FRA a few times and had time to kill while waiting for my flights. I noticed that not only taxi speed but also towing speed was substantially higher than what I am used to observe in the USA.

MB


User currently offlineBoysteve From United Kingdom, joined Apr 2004, 930 posts, RR: 0
Reply 39, posted (7 years 3 months 1 week 13 hours ago) and read 23968 times:

Quoting GEG (Reply 25):
Does the weight of the aircraft have an impact on the speed it can taxi at, so would a higher weight lend itself to lower taxi speeds?

From personal observation at MAN yes. The PK and EK 777's can take an age to trundle pass the viewing park whereas the B737 and A320 types pass at significantly higher speed.


User currently offlineBoston92 From United States of America, joined Aug 2006, 3390 posts, RR: 7
Reply 40, posted (7 years 3 months 1 week 11 hours ago) and read 23938 times:

I remember an OO flight into LAX on an EM2 where we might have well landed on the taxiway. There were two company (UA) 747, and one company 777 behind us and we were told to exit 6/7 R/L asap. We landed, full stopping pwr and exited the runway doing at LEAST 90 - 100 knots.


"Why does a slight tax increase cost you $200 and a substantial tax cut save you 30 cents?"
User currently offline757MDE From Colombia, joined Sep 2004, 1753 posts, RR: 6
Reply 41, posted (7 years 3 months 1 week 5 hours ago) and read 23884 times:

Quoting NASOCEANA (Reply 37):
I once heard that pilots would purposely slow taxi during contract neogations to more clearly get their points across to upper management.

This happened in Avianca some years ago when they were almost bankrupt and in the C-11. It was called "Operación Tortuga" ("Operation Turtle"). The Pilots would taxi really slow, take their full allowed time for lunch (in practice they used less than half) and stuff like that.



I gladly accept donations to pay for flight hours! This thing draws man...
User currently offlineBlackbird From , joined Dec 1969, posts, RR:
Reply 42, posted (7 years 2 months 3 weeks 1 day 4 hours ago) and read 23608 times:

PhilSquares,

When did the Airlines start monitoring taxi-speeds using the FOQA and Flight Recorder? If you can't think of an exact year, can you at least give me a decade?

Andrea Kent


User currently offlineHAWK21M From India, joined Jan 2001, 31660 posts, RR: 56
Reply 43, posted (7 years 2 months 3 weeks 1 day 3 hours ago) and read 23613 times:

15-20 kts.
Think about those Tires overheating & wearing out before time.

Out here there is one operator that Taxies above 25kts almost 80% of the time.They'll get to the stand faster,The Pax are happier,But what about the Tires after that long drive.

regds
MEL



Think of the brighter side!
User currently offlineBlackbird From , joined Dec 1969, posts, RR:
Reply 44, posted (7 years 1 month 1 week 2 days 16 hours ago) and read 23231 times:

When did the legacy-airlines start installing the FOQA system to monitor taxi-speeds?

Andrea K


User currently offlineIAHFLYR From United States of America, joined Jun 2005, 4790 posts, RR: 22
Reply 45, posted (7 years 1 month 1 week 2 days 14 hours ago) and read 23215 times:

Quoting Blackbird (Reply 42):
can you at least give me a decade?

Late 1990's I know a number of operators were using some form of FOQA data.....and that data isn't put of for public consumption too often, if it is for whatever reason, the data is totally sanitized.

Quoting PhilSquares (Reply 32):
For instance at SQ, stabilised approached are a very hot item.

as PhiSquares notes at his company, it is also closely watched at quite a few airlines, and the FOQA data is used to track the 1,000' AGL stabilized approached.

Quoting PhilSquares (Reply 32):
I think a much better use for the program would to review the data and use it in recurrent simulator training.

I believe some airlines do that very thing.

Quoting NASOCEANA (Reply 37):
I once heard that pilots would purposely slow taxi during contract neogations to more clearly get their points across to upper management. Would this be true?

It has been known to happen but not too often from what I've witnessed in the 7-8 years.



Any views shared are strictly my own and do not a represent those of any former employer.
User currently offlineMandala499 From Indonesia, joined Aug 2001, 6751 posts, RR: 76
Reply 46, posted (7 years 1 month 1 week 2 days 13 hours ago) and read 23209 times:

Some variables that they use:

Approach Criterias: (altitudes are AGL)
1. Descent rates >1000fpm below 1000ft
2. N1 <50% between 1000ft and 50ft...
3. Speed below 1000ft
4. ILS deviation between 1000 and 200ft
5. Flare (time between idle and ground sensing detect)
6. Use of reversers below 50kts
7. Flap position increase below 1000ft (or 500ft)
8. Gear deployment below 1000ft
9. Use of speedbrakes below 1000ft
10. IRS tail and crosswind exceeding limits on flare

Taxi criteria:
1. IRS Ground speed >25kts at N1 <30% at flaps <15
2. IRS heading change >10deg at >10kt at N1 <30% at flaps <15
3. N1>30% at flaps 0

Take off criteria:
1. IRS tail and cross wind exceeding on t/o roll
2. Sink rate <500ft AGL
3. Bank angle <25 deg <500ft AGL

As you see, it's whatever the company wants to note for SOP violations etc.
The airline probably would announce it to the crew that FOQA is installed, but do not say what criterias are used etc...

Mandala499



When losing situational awareness, pray Cumulus Granitus isn't nearby !
User currently offlineInnocuousFox From United States of America, joined Dec 2003, 2805 posts, RR: 15
Reply 47, posted (7 years 1 month 1 week 2 days 11 hours ago) and read 23204 times:

Quoting HAWK21M (Reply 43):
15-20 kts.
Think about those Tires overheating & wearing out before time.

Out here there is one operator that Taxies above 25kts almost 80% of the time.They'll get to the stand faster,The Pax are happier,But what about the Tires after that long drive.

Uh... Geometry 101, the tires rotate the same number of times no matter how quickly you taxi.



Dave Mark - Intrinsic Algorithm - Reducing the world to mathematical equations!
User currently offline2H4 From United States of America, joined Oct 2004, 8955 posts, RR: 60
Reply 48, posted (7 years 1 month 1 week 2 days 11 hours ago) and read 23216 times:
AIRLINERS.NET CREW
DATABASE EDITOR

Quoting InnocuousFox (Reply 47):
Uh... Geometry 101, the tires rotate the same number of times no matter how quickly you taxi.

Faster taxiing produces higher tire temperatures. Higher tire temperatures result in increased wear.

Mel knows what he's talking about.  yes 

2H4




Intentionally Left Blank
User currently offlineHAWK21M From India, joined Jan 2001, 31660 posts, RR: 56
Reply 49, posted (7 years 1 month 1 week 2 days 1 hour ago) and read 23159 times:

Quoting InnocuousFox (Reply 47):
the tires rotate the same number of times no matter how quickly you taxi



Quoting 2H4 (Reply 48):
Faster taxiing produces higher tire temperatures. Higher tire temperatures result in increased wear.

Mel knows what he's talking about

Thanks 2H4.

The accumulation of stress in the Tires added by the High temperature build up due to this faster than average taxing reduces tire life.
regds
MEL



Think of the brighter side!
User currently offlinePhilSquares From , joined Dec 1969, posts, RR:
Reply 50, posted (7 years 1 month 1 week 1 day 22 hours ago) and read 23143 times:

Quoting Blackbird (Reply 42):
PhilSquares,

When did the Airlines start monitoring taxi-speeds using the FOQA and Flight Recorder? If you can't think of an exact year, can you at least give me a decade?

Andrea Kent

With the advent of the DFDR airlines started looking at more things. Some airlines even take it to an extreme. There is an airline in Asia that fines the crews if the taxi speed is over 20 knots!

I would say most legacy carriers in the US reached an agreement with their pilots in the mid 90s to use DFDR data for non-punative uses.


User currently offlineHAWK21M From India, joined Jan 2001, 31660 posts, RR: 56
Reply 51, posted (7 years 1 month 1 week 1 day 1 hour ago) and read 23030 times:

Quoting PhilSquares (Reply 50):
There is an airline in Asia that fines the crews if the taxi speed is over 20 knots!

Which one would that be.
regds
MEL



Think of the brighter side!
User currently offlineAirframeAS From United States of America, joined Feb 2004, 14150 posts, RR: 24
Reply 52, posted (7 years 1 month 3 days 17 hours ago) and read 22860 times:

I think WN takes the award for the quickest taxi time in this country, hands down. They taxi to/from gate as if there was no tomorrow. Not that its a bad thing. It would be cool to see a Ryanair vs. Southwest taxi race!


A Safe Flight Begins With Quality Maintenance On The Ground.
User currently offlineBlackbird From , joined Dec 1969, posts, RR:
Reply 53, posted (7 years 1 month 1 day 8 hours ago) and read 22689 times:

I've been told Ryanair has even Southwest beat.

Andrea K


User currently offlineHAWK21M From India, joined Jan 2001, 31660 posts, RR: 56
Reply 54, posted (7 years 1 month 1 day 1 hour ago) and read 22676 times:

Quoting Blackbird (Reply 53):
I've been told Ryanair has even Southwest beat.



Quoting AirframeAS (Reply 52):
think WN takes the award for the quickest taxi time in this country

I noticed an AI A310 last night.Looked like it was Taxying out after vacating the Runway around 40-60kts.  
regds
MEL

[Edited 2007-06-11 10:00:30]


Think of the brighter side!
User currently offlineSaab2000 From Switzerland, joined Jun 2001, 1610 posts, RR: 11
Reply 55, posted (7 years 1 month 21 hours ago) and read 22652 times:

FOQA programs are easy to monitor. We have one in place at my current carrier. All information is de-identified for anonymity. If the company has a concern it goes to the union 'gatekeeper', who is able to identify the pilots involved. FOQA at my company is for safety, not for the purpose of harassing pilots. BTW, common sense rules at my carrier and in 40 years of operations I am not familiar with a single incident related to taxiing speeds.

Safety is one thing. Micromanagement from an office is something altogether different. Hire responsible pilots and train them properly and most of the reason for micromanagement is gone.

BTW, where I fly (NE US nowadays) taxi speed is not the issue. Since it is possible to move 0 feet in an hour at some the airports we go to (PHL and LGA come to mind.....) fuel conservation during taxi is a greater concern than speed.



smrtrthnu
User currently offlineHAWK21M From India, joined Jan 2001, 31660 posts, RR: 56
Reply 56, posted (7 years 1 month 21 hours ago) and read 22685 times:

Quoting Saab2000 (Reply 55):
Hire responsible pilots and train them properly and most of the reason for micromanagement is gone.

I heard Emirates has a very Strict policy of hiring the best.One of our Flight crew got selected recently for the T7s.
regds
MEL



Think of the brighter side!
User currently offlinehmmmm... From Canada, joined May 1999, 2104 posts, RR: 5
Reply 57, posted (1 year 4 weeks 1 day 14 hours ago) and read 8197 times:

Take a look at this video . At the end he gets up to about 30-40 mph.


An optimist robs himself of the joy of being pleasantly surprised
User currently offlineBoeing77w From United Kingdom, joined May 2007, 202 posts, RR: 0
Reply 58, posted (1 year 4 weeks 1 day 8 hours ago) and read 8033 times:

Ryanair have a limit of 50kts when back tracking an active runway, 30kts in a straight line on a taxiway, 15kts on the apron and 10kts around corners.

The speeds are monitored.


User currently offlineCosmicCruiser From United States of America, joined Feb 2005, 2255 posts, RR: 15
Reply 59, posted (1 year 4 weeks 1 day 5 hours ago) and read 7941 times:

Quoting Blackbird (Reply 20):
I more accurately meant to say which airlines actually care a lot about taxi speeds, btw

When I was at my co. they didn't chk the FDR but your taxi speeds straight, 45 deg turn and 90 deg turn were definitely monitored on line checks and sim rides.


User currently offline71Zulu From United States of America, joined Aug 2006, 3057 posts, RR: 0
Reply 60, posted (1 year 4 weeks 1 day 4 hours ago) and read 7927 times:

Fast taxi here...

http://youtu.be/J-C5leIxSos

Expressjet ERJ-145



The good old days: Delta L-1011s at MSY
User currently offlineCosmicCruiser From United States of America, joined Feb 2005, 2255 posts, RR: 15
Reply 61, posted (1 year 4 weeks 1 day 4 hours ago) and read 7896 times:

Quoting InnocuousFox (Reply 47):
Geometry 101, the tires rotate the same number of times no matter how quickly you taxi.

true but excess speeds build up heat which affects brake performance.


User currently offlineRussianJet From Belgium, joined Jul 2007, 7687 posts, RR: 21
Reply 62, posted (1 year 4 weeks 1 day 3 hours ago) and read 7876 times:
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At STN I've driven parallel to many a taxying aircraft, and on a long taxiway have seen aircraft (738, A319) doing at least 30mph. Never seen them doing much over that though, but it's way faster than any man could walk!


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User currently offlineNorthStarDC4M From Canada, joined Apr 2000, 2987 posts, RR: 37
Reply 63, posted (1 year 4 weeks 23 hours ago) and read 7738 times:
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Quoting 71Zulu (Reply 60):

Fast taxi here...

http://youtu.be/J-C5leIxSos

Expressjet ERJ-145

I've always thought regional types seem to taxi faster than heavies... I know I've seen Jazz Dash 8s and/or ACExpress B1900Ds moving much faster than anything else around YYZ, true or?



Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety.
User currently offlineCitationJet From United States of America, joined Mar 2003, 2413 posts, RR: 3
Reply 64, posted (1 year 4 weeks 21 hours ago) and read 7647 times:

Quoting NASOCEANA (Reply 37):
I once heard that pilots would purposely slow taxi during contract neogations to more clearly get their points across to upper management. Would this be true?

Positively true.

Quoting ConcordeBoy (Reply 6):
I know MSY's management has jokingly threatened WN with speedbumps in the past...

 
Quoting ConcordeBoy (Reply 6):
...and on the opposite end of the spectrum are AA's S80s.

   I agree with that.



Boeing Flown: 701,702,703;717;720;721,722;731,732,733,734,735,737,738,739;741,742,743,744,747SP;752,753;762,763;772,773.
User currently offlineCitationJet From United States of America, joined Mar 2003, 2413 posts, RR: 3
Reply 65, posted (1 year 4 weeks 21 hours ago) and read 7641 times:

Quoting 71Zulu (Reply 60):
Fast taxi here...

http://youtu.be/J-C5leIxSos

Expressjet ERJ-145

Notice the spoilers are deployed. He must be going fast.



Boeing Flown: 701,702,703;717;720;721,722;731,732,733,734,735,737,738,739;741,742,743,744,747SP;752,753;762,763;772,773.
User currently offlineStarlionblue From Greenland, joined Feb 2004, 16975 posts, RR: 67
Reply 66, posted (1 year 4 weeks 19 hours ago) and read 7598 times:

Quoting ConcordeBoy (Reply 6):
...and on the opposite end of the spectrum are AA's S80s.

This may have something to do with idle power. It is frowned upon (and uncomfortable for pax) to ride the brakes so you want to go at idle power or whatever you need for the plane to move. Presumably different airliners have different speeds on idle.

In a Cessna 172S it is 15-16 knots. That's the speed I often end up taxiing at if there is a long straight because I don't want to ride the brakes. Definitely faster than a brisk walk.



"There are no stupid questions, but there are a lot of inquisitive idiots."
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