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Dips In Runways  
User currently offlineBoeing777_14 From , joined Dec 1969, posts, RR:
Posted (13 years 11 months 1 week 2 days 1 hour ago) and read 1843 times:

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?!

18 replies: All unread, jump to last
 
User currently offlineBritishmidland From , joined Dec 1969, posts, RR:
Reply 1, posted (13 years 11 months 1 week 2 days ago) and read 1788 times:

you mean the pic

Click for large version
Click here for full size photo!

Photo © Chris Coduto

?


User currently offlinePropilotJW From United States of America, joined Mar 2000, 589 posts, RR: 6
Reply 2, posted (13 years 11 months 1 week 2 days ago) and read 1782 times:

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.

User currently offlineBoeing777_14 From , joined Dec 1969, posts, RR:
Reply 3, posted (13 years 11 months 1 week 2 days ago) and read 1769 times:

yes, that one, do u know y?


User currently offlineBoeing777_14 From , joined Dec 1969, posts, RR:
Reply 4, posted (13 years 11 months 1 week 2 days ago) and read 1766 times:

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

User currently offlinePropilotJW From United States of America, joined Mar 2000, 589 posts, RR: 6
Reply 5, posted (13 years 11 months 1 week 2 days ago) and read 1765 times:

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)

User currently offlineBritishmidland From , joined Dec 1969, posts, RR:
Reply 6, posted (13 years 11 months 1 week 2 days ago) and read 1760 times:

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


User currently offlineMls515 From United States of America, joined Jun 2000, 3076 posts, RR: 8
Reply 7, posted (13 years 11 months 1 week 2 days ago) and read 1756 times:


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.


User currently offlineAdam84 From United States of America, joined Jul 1999, 1400 posts, RR: 2
Reply 8, posted (13 years 11 months 1 week 2 days ago) and read 1754 times:

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.

User currently offlineRalgha From United States of America, joined Nov 1999, 1614 posts, RR: 6
Reply 9, posted (13 years 11 months 1 week 2 days ago) and read 1740 times:

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.


09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0
User currently offlineTurkair From Turkey, joined Jun 2005, 0 posts, RR: 0
Reply 10, posted (13 years 11 months 1 week 1 day 23 hours ago) and read 1728 times:

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.

User currently offlineWishihadalife From , joined Dec 1969, posts, RR:
Reply 11, posted (13 years 11 months 1 week 1 day 22 hours ago) and read 1714 times:

"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...


User currently offlineAussieErj145 From , joined Dec 1969, posts, RR:
Reply 12, posted (13 years 11 months 1 week 1 day 22 hours ago) and read 1708 times:

Just to be a bit different,
Sydney Kingsford-Smith Airport has a hump!


User currently offlineDanny From Poland, joined Apr 2002, 3509 posts, RR: 2
Reply 13, posted (13 years 11 months 1 week 1 day 18 hours ago) and read 1696 times:

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


User currently offlineGoingboeing From United States of America, joined Dec 1999, 4875 posts, RR: 16
Reply 14, posted (13 years 11 months 1 week 1 day 17 hours ago) and read 1687 times:

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

User currently offlineRyaneverest From , joined Dec 1969, posts, RR:
Reply 15, posted (13 years 11 months 1 week 1 day 15 hours ago) and read 1672 times:

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.


User currently offlineLHMark From United States of America, joined Jan 2000, 7255 posts, RR: 46
Reply 16, posted (13 years 11 months 1 week 1 day 15 hours ago) and read 1658 times:

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
User currently offlineBruce From United States of America, joined May 1999, 5056 posts, RR: 15
Reply 17, posted (13 years 11 months 1 week 1 day 11 hours ago) and read 1619 times:

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
User currently offlineTrintocan From United Kingdom, joined Apr 2000, 3238 posts, RR: 4
Reply 18, posted (13 years 11 months 6 days 13 hours ago) and read 1579 times:

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.




Hop to it, fly for life!
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