Guest

Dips In Runways

Wed Oct 18, 2000 1:45 pm

does anyone know y there r dips in the runways? here's a nice pic of one http://www.airliners.net/open.file?id=111141 can anyone tell me? please?!
 
BritishMidland
Posts: 167
Joined: Sat May 27, 2000 4:57 am

RE: Dips In Runways

Wed Oct 18, 2000 1:50 pm

you mean the pic

Click for large version
Click here for full size photo!

Photo © Chris Coduto

?
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propilotjw
Posts: 520
Joined: Mon Mar 27, 2000 1:02 pm

RE: Dips In Runways

Wed Oct 18, 2000 1:53 pm

The reason that dips are in runways is because there is absolutely no way for the workers to get them perfectly level. It does not affect perfomace and you usually see the dips in the much longer runways and the short ones only deviaite by about a foot or two.
 
Guest

RE: Dips In Runways

Wed Oct 18, 2000 1:53 pm

yes, that one, do u know y?
 
Guest

RE: Dips In Runways

Wed Oct 18, 2000 1:56 pm

ok, thanx, but there was another pic, and it was at heathrow form a B747 so the run way had to be pretty long, and it was not as dipped as that one
 
propilotjw
Posts: 520
Joined: Mon Mar 27, 2000 1:02 pm

RE: Dips In Runways

Wed Oct 18, 2000 1:58 pm

well if the ground is flat already, it won't dip. if it is hilly it will be too expensive to elevate it to keep it level. by the way, the runway in this pic is 75 feet wide (you can tell b/c there are 6 threshold stripes)
 
BritishMidland
Posts: 167
Joined: Sat May 27, 2000 4:57 am

RE: Dips In Runways

Wed Oct 18, 2000 2:00 pm

it doesn't matter ... like do hills effect your driving on a highway. When the jet is careening down the runway all that matters is relative speed and whether the runway is long enough (LOL). As long as the "dips" are not trenches and the wheels ride smooth, the plane encounters no loss or gain in performance.

There is actually a picture in Airliners mag, I think an Iceland issue where there is a little runway (one of the shortest in the world or something) and it looks like a U. serious. check it out.

Regards,
BD
Enter the new age: A340-500, 777-200LR, 7E7
 
mls515
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RE: Dips In Runways

Wed Oct 18, 2000 2:02 pm


Click for large version
Click here for full size photo!

Photo © James Fullworth



One of DSM's runways is dipped slightly also. I think it isn't worth it for them to make it perfectly level.
 
Adam84
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RE: Dips In Runways

Wed Oct 18, 2000 2:03 pm

Kona airport in Hawaii has a dip in the runway, you dont even notice it unless you look at it. Also, Kona airport is very interesting because when you fly in there you are expecting some real nice grass and stuff, but you fly in there and there is nothing but lava fields and little chunks of grass growing through the little cracks.
 
Ralgha
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RE: PropilotJW

Wed Oct 18, 2000 2:41 pm

You can't see the threshold strips in that picture, I'm assuming you're talking about the one posted by Britishmidland (second post in the thread). The three stripes you can see in the foreground are touchdown-zone markings, not threshold markings.
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Turkair
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Joined: Tue Jun 14, 2005 6:49 am

RE: Dips In Runways

Wed Oct 18, 2000 3:16 pm

In Istanbul Ataturk Airport (LTBA) there is a dip in 06/24 runway. This dip is used for stopping aircraft. But it can be dangerous during rainy days. Because of water in this section. The pilot can find himself and the aircraft in hydroplanin conditions.
 
Guest

RE: Dips In Runways

Wed Oct 18, 2000 4:36 pm

"does anyone know y there r dips in the runways?"


Why are there dips in any sort of pavement??? Give us a break and stop wasting our time...
 
Guest

RE: Dips In Runways

Wed Oct 18, 2000 4:44 pm

Just to be a bit different,
Sydney Kingsford-Smith Airport has a hump!
 
Danny
Posts: 3714
Joined: Thu Apr 25, 2002 3:44 am

RE: Dips In Runways

Wed Oct 18, 2000 8:18 pm

Wishihadalife - actually, YOU wasted YOUR time reading this post. If it doesn't interest you, just don't read it. And spare us you butt stupid comments.

AND - don't you go be speaking for the rest of us...

Danny
 
goingboeing
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Joined: Sat Dec 04, 1999 1:58 am

RE: Dips In Runways

Wed Oct 18, 2000 8:56 pm

In France, I think they are blaming the dips on Continental  
 
Guest

RE: Dips In Runways

Wed Oct 18, 2000 10:50 pm

Actually these dips are to help the aircraft rotate.

During the takeoff roll, the aircraft accelerates. When it gets to the downward slope of the dip, it accelerates even quicker. And when it gets to the other side (upward), it helps the aircraft rotate and fly into the sky.

This has been discussed not long ago, so I guess you can use the search function to find your answer.
 
LHMark
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Joined: Fri Jan 21, 2000 2:18 am

RE: Dips In Runways

Wed Oct 18, 2000 11:05 pm

Maybe we could limit the dips with taller airport perimeter fences. THAT oughta keep 'em off the runway.
"Sympathy is something that shouldn't be bestowed on the Yankees. Apparently it angers them." - Bob Feller
 
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Bruce
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RE: Dips In Runways

Thu Oct 19, 2000 3:45 am

There is a significant dip in the runway (when viewed from the end) at the Tallahassee Regional Airport in Tallahassee, FL (TLH) which is a fairly small airport handling mostly 737 & md80 types. I also noticed a dip on the north side runway at ATL (26R I think) when I took off and it did not affect the ride.
Bruce Leibowitz - Jackson, MS (KJAN) - Canon 50D/100-400L IS lens
 
trintocan
Posts: 2728
Joined: Sun Apr 23, 2000 6:02 pm

RE: Dips In Runways

Sat Oct 21, 2000 1:48 am

Antigua's airport (ANU, Vere Bird International) has a significant dip in its main runway. It is visible as you taxi along the taxiway and as you turn onto the threshold for take-off. The same is also true for Tobago (TAB, Crown Point International). I have wondered about this too.

Trintocan.

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