User avatar
LAX
Topic Author
Posts: 2186
Joined: Sun Dec 24, 2000 11:06 am

At What Speed Should Aircraft Taxi?

Mon Apr 30, 2001 5:51 pm

I remember seeing a story on CNN recently involving this subject of airliners taxiing way too fast.....so as to reduce delays. I think the airline they mentioned was Continental (but I'm not sure).

What do you think? Do jets taxi at too high a speed, thereby endangering the plane & pax?

And is there an FAA speed limit for planes while on the ground?
 
gf-a330
Posts: 1604
Joined: Tue Apr 03, 2001 10:09 pm

RE: At What Speed Should Aircraft Taxi?

Mon Apr 30, 2001 5:53 pm

i do not think aeroplanes taxi fast....i think it is opposite.....they taxi slow !


the time it takes to taxi to the runway and take off is ages
 
User avatar
LAX
Topic Author
Posts: 2186
Joined: Sun Dec 24, 2000 11:06 am

RE: At What Speed Should Aircraft Taxi?

Mon Apr 30, 2001 6:23 pm

I'd have to agree with you, GF-A330. I think it's too slow most of the time too.

But there was a story on the news a while back about some pilots moving way way too fast on the apron.

Just wondered what the official guidelines were on the subject....if there are any.
 
VC-10
Posts: 3546
Joined: Tue Oct 26, 1999 11:34 am

RE: At What Speed Should Aircraft Taxi?

Mon Apr 30, 2001 6:56 pm

The guidelines I use for taxi-ing for maintenance is, 20 kts max on the straight and a max of 10 kts for a turn (slower if wet). Don't forget the brakes are pretty effective, they are designed to stop a few hundred tonnes of aeroplane from 100+ kts, so stopping a a/c during taxi-ing is no problem. In reality they are too fierce during taxiing.
 
mls515
Posts: 2954
Joined: Mon Jun 26, 2000 5:56 am

RE: At What Speed Should Aircraft Taxi?

Mon Apr 30, 2001 7:04 pm

I was on a Ryanair 737 that was taxiing pretty quick at BHX and the bumps were pretty severe. Maybe it should depend on "road conditions"?

mls515
 
IndianGuy
Posts: 3126
Joined: Fri Jul 07, 2000 3:14 pm

RE: At What Speed Should Aircraft Taxi?

Mon Apr 30, 2001 8:35 pm

A local airline has a bad reputation for taxiing fast, esp. when their flights are delayed.

Some time back our aircraft (a 737-400) was taxiing so fast down the taxiway parallel to the runway, that i for a moment thought the pilot was going to take off from the taxiway itself!

I heard from friends in the US that Southwest pilots taxi like crazy!
 
Dazed767
Posts: 4967
Joined: Tue May 18, 1999 11:55 am

RE: At What Speed Should Aircraft Taxi?

Mon Apr 30, 2001 9:04 pm

I was on a jetBlue flight and according to the map, we were doing 25mph. I saw a SW 737 taxiing out at MCO, and let me tell you they were movin! When it went to turn on to the runway, the whole plane wobbled side to side. Pretty funny if you ask me. Airlines like southwest do that because the pilots are paid by the (mile?). So they get from point A to point B asap.
 
Singapore 777
Posts: 980
Joined: Sat May 29, 1999 3:00 pm

RE: At What Speed Should Aircraft Taxi?

Mon Apr 30, 2001 11:54 pm

Why don't you go and see the Malaysian Airlines 737 pilots at Changi Airport? I thought they were a little too fast. This also applies to Singapore A310 and sometimes SilkAir A320 pilots!!!

A340 taxies rather slowly. The brakes feel a bit spongy too.
 
turbulence
Posts: 876
Joined: Sun Nov 14, 1999 1:33 am

RE: At What Speed Should Aircraft Taxi?

Tue May 01, 2001 12:38 am

I would not be able to assure it, but I read in an aviation magazin that although it might "look" slow, and, the bigger the airplane, the slower the effect -does it have anything to do with Singapore 777's comment?-, the actual taxi speed can be of 100 Km/h (aprox 60mph).

Any professionals?

Best turbulences
 
User avatar
apuneger
Posts: 2964
Joined: Fri Sep 08, 2000 2:43 pm

RE: At What Speed Should Aircraft Taxi?

Tue May 01, 2001 1:56 am

Turbulence: where the h@!ll did you read that? Taxiing at 100km/h????

I think the only place where this is possible is at the high-speed taxiways, after landing (or do they also use them before takeoff?).

I think that, in normal circumstances, the taxispeed stays below, let's say 25 knots.

Ivan
Ivan Coninx - Brussels Aviation Photography
 
Alitalia744
Posts: 3777
Joined: Thu Mar 30, 2000 8:22 am

RE: At What Speed Should Aircraft Taxi?

Tue May 01, 2001 2:46 am

I remember one time on a TW 747 in ATH, during taxi, the pilot extended all wing spoilers to slow the aircraft down. It was ages ago, so I dont remember all details (runway/etc) but do remember the wings were a rocking!

Some see lines, others see between the lines.
 
Guest

RE: At What Speed Should Aircraft Taxi?

Tue May 01, 2001 2:50 am

American pilots have a reputation for taxiing too slow, United pilots from what I remember taxi at a good clip, but not too fast to create a hazard.
 
HNL747
Posts: 34
Joined: Sun Jul 09, 2000 4:50 am

RE: At What Speed Should Aircraft Taxi?

Tue May 01, 2001 3:29 am

Most airport taxiways are designed to accomodate taxiing speeds of up to 20mph. When airlines exceed the limit on a consistent basis the pavement is subject to accelerated deterioration and shorter operational life -- this results in higher refurbishment and replacement costs.
 
Ndebele
Posts: 2847
Joined: Mon Apr 09, 2001 3:16 am

RE: At What Speed Should Aircraft Taxi?

Tue May 01, 2001 3:41 am

With my car, speed limit on the ramp is 30 km/h. Once I was in a hurry, I had about 50 km/h, when suddenly a LH 737 was crossing my way much, much faster!
 
afitch7881
Posts: 722
Joined: Tue Aug 29, 2000 2:04 am

RE: At What Speed Should Aircraft Taxi?

Tue May 01, 2001 5:29 am

It seems that Southwest pilots taxi at rather fast clips. Maybe something to do with their famous 25-30 minute turn arounds!

Eric
 
User avatar
fanoftristars
Posts: 1544
Joined: Mon Jul 17, 2000 9:03 am

RE: At What Speed Should Aircraft Taxi?

Tue May 01, 2001 5:39 am

I have watched a lot of aircraft take off lately from SLC, and I noticed that the aircraft that were taxiing fast were consistantly Southwest. I also noticed that the controllers would often give them takeoff clearence way before they got to the end of the runway. They made the turn onto the active pretty fast and off they went whithout hesitation.

What airports have a lot of high speed taxiways? I noticed last time I was at DEN, we landed and turned off the runway and taxied for what seemed like forever, but we were going really fast along the ground. I'm not totally sure what runway, but it was to the west of the main terminals and we came in from the north.
"FLY DELTA JETS"
 
roberson
Posts: 168
Joined: Tue Dec 05, 2000 10:05 am

RE: At What Speed Should Aircraft Taxi?

Tue May 01, 2001 5:40 am

It seems that Frontier pilots taxi quickly. At MCI prior to departure to DEN, we were cruising down the taxiway and suddenly the pilot slams on the brakes and engages the thrust-reversers to slow the plane. It didn't seem like we were going any faster than usual, though. Guess he was trying to save the brake pads. It was kinda neat, though.
 
VC-10
Posts: 3546
Joined: Tue Oct 26, 1999 11:34 am

RE: At What Speed Should Aircraft Taxi?

Tue May 01, 2001 7:16 am

Singapore 777,

A340 brakes are just fine.

Alitalia744,

At Taxi speed spoilers will have no effect. The wings would be rocking from the uneven taxiway and the shock struts absorbing the uneveness
 
ZOOMER
Posts: 216
Joined: Sun Dec 03, 2000 11:01 pm

RE: At What Speed Should Aircraft Taxi?

Tue May 01, 2001 8:03 am

Southwest are always in a hurry. Sometimes they're going so fast that they run off the end of the runway Big grin
Seriously though, you will find that generally those cheapie companies who rely on short turnarounds tend to be the faster taxiers. Didn't help us on my last SWA flight from STL to IND. We spent more time waiting in line for departure at STL than the flight time to IND!!
 
Guest

RE: At What Speed Should Aircraft Taxi?

Tue May 01, 2001 9:24 am

Delta pilots taxi at a good pace. 10 knots or so.
 
Alitalia744
Posts: 3777
Joined: Thu Mar 30, 2000 8:22 am

VC-10...

Tue May 01, 2001 11:59 am

That was my point exactly, we were going much faster than taxi speed....that was the only aircraft I'd been on where the spoilers were extended on the ground before we ever got in the air....

and yes, I've seen rocking wings at every airport I've been at...
Some see lines, others see between the lines.
 
XFSUgimpLB41X
Posts: 3960
Joined: Fri Aug 25, 2000 1:18 am

RE: At What Speed Should Aircraft Taxi?

Tue May 01, 2001 12:29 pm

The bigger the airplane, the harder it is to tell how fast you are going. In a large widebody you can be going upwards of 40 kts and barely even tell. Reccomended speed is 25 kts.
Chicks dig winglets.
 
afitch7881
Posts: 722
Joined: Tue Aug 29, 2000 2:04 am

RE: At What Speed Should Aircraft Taxi?

Tue May 01, 2001 1:01 pm

I might be wrong, but my understanding is that spoilers at the time of landing dont really slow the aircraft down as much as they keep the aircraft down on the runway. They put presure on the plane to keep the plane on the ground and enables it to slow down.

Eric



P.S.

I think I worded it a little wrong, but hopefully you get what I am saying.
 
Guest

RE: At What Speed Should Aircraft Taxi?

Tue May 01, 2001 7:19 pm

On Saturday @ SIN I saw 9M-MMQ speeding to gate F31  Smile/happy/getting dizzy . SilkAir A320's 9V-SLD and SLB were also speeding  Smile/happy/getting dizzy .


GUNDU
 
Singapore 777
Posts: 980
Joined: Sat May 29, 1999 3:00 pm

RE: At What Speed Should Aircraft Taxi?

Tue May 01, 2001 8:26 pm

GUNDU: Maybe you meant F30, the corner gate didn't you? F31 is usually used for big jets like the Boeing 747 or 777.
 
VC-10
Posts: 3546
Joined: Tue Oct 26, 1999 11:34 am

RE: At What Speed Should Aircraft Taxi?

Tue May 01, 2001 8:43 pm

Alitalia744,

Nobody would taxi at speeds where the spoilers would be effective.

I think what you saw was the pre-flight control check for full and free movement.
 
User avatar
LAX
Topic Author
Posts: 2186
Joined: Sun Dec 24, 2000 11:06 am

RE: At What Speed Should Aircraft Taxi?

Thu May 03, 2001 9:50 am

If the plane's wheels come off the ground while in the middle of a turn, do you think it's going a wee bit too fast?  Smile/happy/getting dizzy  Smile/happy/getting dizzy
 
XFSUgimpLB41X
Posts: 3960
Joined: Fri Aug 25, 2000 1:18 am

RE: Alitalia744

Thu May 03, 2001 3:39 pm

Spoilers do not slow the airplane down, they kill all the lift on the wing. If the spoilers are deployed on the ground it is only because they are cycling them as part of their checklists. I see Dash 8's do this alot. Thrust reversers are also very innefective below varying airspeeds (60-90 knots range).... brakes are pretty much all that is used on the ground.
Chicks dig winglets.
 
L-188
Posts: 29881
Joined: Wed Jul 07, 1999 11:27 am

RE: At What Speed Should Aircraft Taxi?

Thu May 03, 2001 7:11 pm

This really happened. We had about two inches of ice on our parking stand with about 1/4 inch of water sitting on top of it....Very slick. Then our 727 flight came in.

You have not lived until you have been 75 feet away from a 727 taxing too fast on ice hit the brakes and the anti-locks go off. The damm marshaller was a new guy who had only been there about a two weeks and this was the first or second time they had him park the airplane. He fell over backwards when that happened....right on his aaaaa.....can!

When the marsheller went down they hit their reversers to slow down to keep from running him down. Throwing up all sorts of spray and what sand there was on the ice. Not a small amount went onto the now prone marshaller.

It was really funny watching this happen. I really enjoyed it because a couple of days earlier I found out that he and my would-be girlfriend where an item. So it wouldn't have bothered me if the plane had run him down but it what did happen was definatly funny.
OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.