IAH744
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Fast Taxi Picture

Mon Dec 19, 2005 3:09 am

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airkas1
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RE: Fast Taxi Picture

Mon Dec 19, 2005 3:14 am

Maybe they were in a hurry  Wink
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RichardPrice
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RE: Fast Taxi Picture

Mon Dec 19, 2005 3:19 am

Its called a highspeed taxiway, you come off the runway part of the way down and slow down on the taxiway rather than clogging up the runway for the rather mundane task of slowing down.

Speeds up landing operations a fair bit.
 
GQfluffy
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RE: Fast Taxi Picture

Mon Dec 19, 2005 3:32 am

Well, they are Federal EXPRESS. Maybe they have some overnight packages on there...
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MYT332
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RE: Fast Taxi Picture

Mon Dec 19, 2005 3:37 am

Quoting RichardPrice (Reply 2):
Its called a highspeed taxiway, you come off the runway

The taxiway is to the left. The aircraft appears to be at the begining of Kai Tak's runway, note the arrows underneath her, so I think this Andy Mok bloke just got his English a bit back to front. It's taking off?
One Life, Live it.
 
Scottiedog
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RE: Fast Taxi Picture

Mon Dec 19, 2005 3:41 am

Look very closely at the markings immediately under the tail. It appears very much as if it is an arrowhead. Now if I recall at Kai Tak there was a displaced threshold, and arrows on the centre-line, are used to separate the start of the paved strip from the threshold. Therefore it looks to me as if this is in fact a photo of an aircraft starting its take-off roll and nothing to do with taxiing.

Anybody else care to comment?
 
DLCnxgptjax
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RE: Fast Taxi Picture

Mon Dec 19, 2005 3:41 am

I agree with Myt322. That's a runway the aircraft is on.
 
IAH744
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RE: Fast Taxi Picture

Mon Dec 19, 2005 3:42 am

Quoting Myt332 (Reply 4):
The taxiway is to the left. The aircraft appears to be at the begining of Kai Tak's runway, note the arrows underneath her, so I think this Andy Mok bloke just got his English a bit back to front. It's taking off?

yea after looking over it a few times i think thats probaly right...

thanks everybody  Smile
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Scottiedog
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RE: Fast Taxi Picture

Mon Dec 19, 2005 3:42 am

Myt332

Sorry, you just beat me to it.....
 
jush
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RE: Fast Taxi Picture

Mon Dec 19, 2005 3:45 am

The aircraft's defenitely on the runway. No doubt from my side.

Strange that the photographer couldn't recognize that fact as he was litteraly standing right beside that plane.

Maybe he needs some lessons what is what

Regds
jush
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GQfluffy
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RE: Fast Taxi Picture

Mon Dec 19, 2005 3:51 am

Well I like my idea better. The rest of you are just wrong. Deal with it.  Big grin
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MYT332
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RE: Fast Taxi Picture

Mon Dec 19, 2005 3:54 am

Quoting ScottieDog (Reply 8):
Sorry, you just beat me to it.....

Take comfort in the saying that great minds think alike.  Wink
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MarshalN
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RE: Fast Taxi Picture

Mon Dec 19, 2005 3:54 am

Was the photographer on a boat? I don't think you can stand there as it is the sea, or at least the edge of the runway.

The Kai Tak runway doesn't allow you to fast taxi, afaik, because you need to make a 180 degrees turn back towards the terminal, and if you are still running fast you'll run into the water.
 
access-air
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RE: Fast Taxi Picture

Mon Dec 19, 2005 4:34 am

Did anyone think that thats a WHITE runway light in the foreground there and NOT a BLUE taxiway light?????

Oh and I dont see any SPOILERS displayed if it is on rollout onto the highspeed taxiway turn off....

Thats a runway kiddies...

Access-Air
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Boeing Nut
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RE: Fast Taxi Picture

Mon Dec 19, 2005 4:51 am

Another explanation is that it could be a slightly timed exposure.
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N766UA
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RE: Fast Taxi Picture

Mon Dec 19, 2005 7:31 am

Yeah those are definately the arrows found in a displaced threshold. He's gotta be on the takeoff roll.
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SlamClick
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RE: Fast Taxi Picture

Mon Dec 19, 2005 7:44 am

If it is a displaced threshold are they supposed to remain at low power until reaching the runway? Maybe he is anticipating just a bit.

Quoting Myt332 (Reply 4):
I think this Andy Mok bloke just got his English a bit back to front.

Hey I guess he can be forgiven. If flight attendants can tell me, a hundred feet from the jetway that "we are still on an ACTIVE RUNWAY" I guess this is not too serious.
Happiness is not seeing another trite Ste. Maarten photo all week long.
 
Fly2HMO
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RE: Fast Taxi Picture

Mon Dec 19, 2005 8:33 am

Quoting SlamClick (Reply 16):
If it is a displaced threshold are they supposed to remain at low power until reaching the runway? Maybe he is anticipating just a bit.

Aircraft can start the takeoff roll as far back in the displaced threshold as they want, but they can't land on any portion of the displaced threshold. Exposure time is probably less than 1/50 of a second. Also, I don't think the plane was going over 30K, especially that early in the runway.

I'm surprised you asked Slamclick, was it different back then when you flew?  Confused
 
hornet425
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RE: Fast Taxi Picture

Mon Dec 19, 2005 11:15 am

 
CFIjames
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RE: Fast Taxi Picture

Mon Dec 19, 2005 11:37 am

How, exactly, can any of you tell how fast the aircraft is going? With the darkened skies, the aircraft could be traveling at a normal taxi speed, and the camera was moved, giving the blurred effect of the background much more than it would had it been a bright sunny day. Regardless of whether it was a taxiway, runway, freeway, or sidewalk.
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spacecadet
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RE: Fast Taxi Picture

Mon Dec 19, 2005 11:46 am

Quoting CFIjames (Reply 19):
With the darkened skies, the aircraft could be traveling at a normal taxi speed, and the camera was moved, giving the blurred effect of the background much more than it would had it been a bright sunny day.

I think you probably just understand more about how camera exposure works than most people.

In a relatively dark exposure like this, the photographer would probably be shooting with both a fairly long shutter speed and as wide an aperture as his lens will allow. The former will introduce motion blur and the latter will result in background blur (even if the camera's stationary). There's a bit of both in this photo.

You can't tell how fast this a/c is going from this pic at all. It may be at the beginning of a takeoff run, or taxiing, but it could still be going five knots for all anyone knows.
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MarshalN
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RE: Fast Taxi Picture

Mon Dec 19, 2005 1:30 pm

Well, from what I remember of Kai Tak, the guy should've started his takeoff roll because IIRC most planes initiate takeoff roll in the displaced threshold, sor of where the JAL plane is in the airport overview. If you look at the FedEx plane it is right about where the yellow crosses are. As far as I can remember, he would have just begun rolling.

So I guess the photographer was not on a boat but was on one of the buildings right next to the runway. I forgot there were a few buildings that way.
 
EMBQA
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RE: Fast Taxi Picture

Mon Dec 19, 2005 1:50 pm

Quoting Hornet425 (Reply 18):
Guys just check this out....

Exactly. The FedX MD-11 is in the same location as the 747 in your picture. The FedX MD-11 is not taxing, it's starting its take off roll...!!

View Large View Medium
Click here for bigger photo!

Photo © Andy Mok


View Large View Medium
Click here for bigger photo!

Photo © Daryl Chapman

Guys, you also need to learn how to post pictures...!!

[Edited 2005-12-19 05:52:52]
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apollo13
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RE: Fast Taxi Picture

Mon Dec 19, 2005 3:45 pm

Why is there the need for a displaced threshold?
 
Islandboy
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RE: Fast Taxi Picture

Mon Dec 19, 2005 5:27 pm

Quoting Apollo13 (Reply 23):
Why is there the need for a displaced threshold?

I believe it has something to do with the ground not being hard enough to sustain aircraft landing on it with high weights. Maybe the land was once swampy etc..

Aircraft can take off from it though using the full displaced thresh-hold.

Someone please feel free to correct me.
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tribird1011
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RE: Fast Taxi Picture

Mon Dec 19, 2005 5:29 pm

Quoting Apollo13 (Reply 23):
Why is there the need for a displaced threshold?

For various reasons really, but the main one would be for obstacles on the glide path to the runway...

In this case you want to land farther down the runway than normal (to clear the trees  Silly ) however if you were taking off, those trees behind you don't matter and you can therefore begin your take-off roll on the displaced threshold.

Not sure where, but there is an airport somewhere that has a 2500 foot or so displaced threshold... now you generally can't use those 2500' for landing, but you sure can use them for taking off...

Another question to everybody out there

What airports have large displaced thresholds ... preferebly 3000' or more. I'm sure there are some, just curious as to where
 
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ZSOFN
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RE: Fast Taxi Picture

Mon Dec 19, 2005 6:28 pm

Quoting Tribird1011 (Reply 25):
Another question to everybody out there

What airports have large displaced thresholds ... preferebly 3000' or more. I'm sure there are some, just curious as to where

Here's a good example - JFK's 31L/13R:


View Large View Medium
Click here for bigger photo!

Photo © Anthony Russo
View Large View Medium
Click here for bigger photo!

Photo © Javier Guerrero

 
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AirPacific747
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RE: Fast Taxi Picture

Mon Dec 19, 2005 6:31 pm

Quoting Tribird1011 (Reply 25):
What airports have large displaced thresholds ... preferebly 3000' or more. I'm sure there are some, just curious as to where

I happened to notice this thing just yesterday while spotting at CPH. There are some long thresholds on especially 04L/22R but also at the end of the other runways

View Large View Medium
Click here for bigger photo!

Photo © Europix - AirTeamImages



[Edited 2005-12-19 10:39:47]
 
sunandan
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RE: Fast Taxi Picture

Mon Dec 19, 2005 7:10 pm

Quoting Tribird1011 (Reply 25):

I believe Madrid also has lengthy displaced thresholds, not sure which runways though.


Cheers!

SS
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malmoaviation
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RE: Fast Taxi Picture

Mon Dec 19, 2005 9:59 pm

That looks like Air Europa taxistyle. Wink Well, taxing in 140 knots on a taxiway is not so great..
 
dw9115
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RE: Fast Taxi Picture

Tue Dec 20, 2005 12:24 am

Just look how light the nose looks it is about to come off the ground.
 
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RE: Fast Taxi Picture

Tue Dec 20, 2005 12:48 am

"Flight 209 now arriving at gate 13...gate 14...gate 15..."

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Gr8Circle
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RE: Fast Taxi Picture

Tue Dec 20, 2005 1:12 am

Anyone who knows Kai-Tak can tell that an aircraft at that position cannot be making a high-speed exit after landing....this is close to the northern end of the runway and pointing south....so, it has to be a take-off roll....

This would have been clear to the guy taking the photograph...
 
Morvious
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RE: Fast Taxi Picture

Tue Dec 20, 2005 1:23 am

Quoting MarshalN (Reply 12):
Was the photographer on a boat?

No, there is some land next to the runway.. (You can see that on the photo above!)

A few small buildings and a Ferrari garage is all I can think off now  Smile.

The overview of the apron is beautifull though.
have a good day, Stefan van Hierden
 
threepoint
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RE: Fast Taxi Picture

Tue Dec 20, 2005 1:24 am

Quoting Dw9115 (Reply 30):
Just look how light the nose looks it is about to come off the ground

Please tell me how you can determine the weight exterted on the nosewheel from this (or any) photo. It would appear that all tires are on the ground, which is about as definite as we can be from simply looking at an old photo.

Quoting CFIjames (Reply 19):
How, exactly, can any of you tell how fast the aircraft is going? With the darkened skies, the aircraft could be traveling at a normal taxi speed, and the camera was moved, giving the blurred effect of the background much more than it would had it been a bright sunny day. Regardless of whether it was a taxiway, runway, freeway, or sidewalk.



Quoting Spacecadet (Reply 20):
You can't tell how fast this a/c is going from this pic at all. It may be at the beginning of a takeoff run, or taxiing, but it could still be going five knots for all anyone knows.

Exactly. I wonder why the first 18 posters couldn't figure this out...
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HAWK21M
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RE: Fast Taxi Picture

Tue Dec 20, 2005 1:31 am

Quoting EMBQA (Reply 22):

Very well illustrated with Pics.
 bigthumbsup 
regds
MEL
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dw9115
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RE: Fast Taxi Picture

Tue Dec 20, 2005 4:33 am

Quoting Threepoint (Reply 34):
Please tell me how you can determine the weight exterted on the nosewheel from this (or any) photo. It would appear that all tires are on the ground, which is about as definite as we can be from simply looking at an old photo.

Look at the angle of the plane from rear to front you can see a 1 1/2 to 2 1/2 degree angle upward on the nose. When the plane is stopped or in taxi it will have a 1/2 to 1 degree downward angle. The main thing that stands out is no spoilers or thrust reverser now if it was almost at the speed needed to taxi they may have been re-deployed. If you have ever noticed when you start your takeoff roll the nose tends to come up a little and when you are at the end of landing it tends to angle down.
 
474218
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RE: Fast Taxi Picture

Tue Dec 20, 2005 11:35 am

Lets see; the slats are out, can't make out where the flaps are, but they are not in landing configuration, the stabilizer is trimmed to about 10 degrees nose down, I would say the MD-11 has started it takeoff roll.
 
CFIjames
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RE: Fast Taxi Picture

Tue Dec 20, 2005 1:29 pm

Islandboy, dont answer questions you dont know the answers to. There are plenty of people who DO know the answer, without asking people to correct you if youre wrong.

The surface may not be able to support the weight of an aircraft, but that is not the PURPOSE of having a displaced threshold. Any private pilot knows that a displaced threshold is put in place to cause the aircraft to land further down the runway than the very end. Ususally due to obstacles, but there can be many reasons.
There are 3 simple rules for making a perfect landing every time. Its a shame that no one knows what they are.