Runways

Foxcow · September 27th, 2005, 20:41

Stupid question. Does anyone know why on long runways the middle is usually at a slightly lower elevation than the ends?

http://www.airliners.net/open.file?i...FP&photo_nr=25

moxiepilot · September 27th, 2005, 22:24

drunk dozer operators

seagull · September 28th, 2005, 02:00

In the photo you provide it appears to dip a bit at around a thousand feet down then go back up again.

They don't dip in the middle necessarily, but usually aren't perfectly flat either, hard to do that over 2 miles or more. They bend a bit with the terrain they're laid on.

September 27th, 2005, 20:41	#1
Foxcow Senior Member Join Date: May 2004 Location: St. Louis Posts: 1,054	Runways Stupid question. Does anyone know why on long runways the middle is usually at a slightly lower elevation than the ends? http://www.airliners.net/open.file?i...FP&photo_nr=25 __________________ "During times of universal deceit, telling the truth becomes a revolutionary act." George Orwell

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September 27th, 2005, 22:24	#2
moxiepilot Old Skool Join Date: Aug 2004 Location: CFI / CFII in PA Posts: 2,670	drunk dozer operators

September 28th, 2005, 02:00	#3
seagull Old Skool Join Date: Sep 2001 Posts: 2,044	In the photo you provide it appears to dip a bit at around a thousand feet down then go back up again. They don't dip in the middle necessarily, but usually aren't perfectly flat either, hard to do that over 2 miles or more. They bend a bit with the terrain they're laid on.