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Runway Numbering  
User currently offlineFlyDeltaJets From United States of America, joined Feb 2006, 1856 posts, RR: 2
Posted (8 years 2 months 1 week 6 days 2 hours ago) and read 2628 times:
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How does the grid numbering system work?


The only valid opinions are those based in facts
14 replies: All unread, jump to last
 
User currently offlineCubsrule From United States of America, joined May 2004, 22726 posts, RR: 20
Reply 1, posted (8 years 2 months 1 week 6 days 2 hours ago) and read 2613 times:

It's easy. Take the compass heading, round to the nearest 10, and lop off a digit. Thus, a runway with a heading of 274 degrees gets rounded to 270, and the runway is 27. Of course, going the other way, the heading is 274-180 or 94 degrees, so the heading going to other way is 9. Left, right, and center (L, R, and C) are simply as you see them, so as you look down the runways, the leftmost one is L. Of course, going the other way, it's right, so if our 274 runway is the leftmost one and is 27L, then the other end is the rightmost, so its 9R.

Where there are more than 3 parallel runways, they are typically numbered in sets. All 5 runways at ATL are parallel, but the north complex is numbered 8-26, the middle 2 are 9-27, and the new runway is 10-28.



I can't decide whether I miss the tulip or the bowling shoe more
User currently offlineSuperhub From Hong Kong, joined Jan 2006, 478 posts, RR: 0
Reply 2, posted (8 years 2 months 1 week 6 days 2 hours ago) and read 2566 times:

Quoting FlyDeltaJets (Thread starter):
How does the grid numbering system work?

What do you mean by grid numbering? Do you mean simply how a number is assigned for a runway? If so, see above post.

Or do you mean earth coordinates?


User currently offlineTimz From United States of America, joined Sep 1999, 6794 posts, RR: 7
Reply 3, posted (8 years 2 months 1 week 6 days 1 hour ago) and read 2538 times:

Quoting Cubsrule (Reply 1):
Take the compass heading,

And he means magnetic, not true (usually). And magnetic north moves over the years, so here and there runways have changed numbers.


User currently offlineCptSpeaking From United States of America, joined Apr 2006, 639 posts, RR: 1
Reply 4, posted (8 years 2 months 1 week 6 days 1 hour ago) and read 2519 times:

Quoting Timz (Reply 3):
so here and there runways have changed numbers

My home airport (KLHZ) where I got my private license just went from 4-22 to 5-23 this past summer while I was working there...
the FAA shut us down for like 4 days so they could patch and paint the runway

Your CptSpeaking  wave 



...and don't call me Shirley!!
User currently offlineANCFlyer From , joined Dec 1969, posts, RR:
Reply 5, posted (8 years 2 months 1 week 6 days 1 hour ago) and read 2482 times:

Quoting CptSpeaking (Reply 4):
My home airport (KLHZ) where I got my private license just went from 4-22 to 5-23 this past summer while I was working there...

As did ANC . . .

6-24 is now 7-25.


User currently offlineComairGuyCVG From United States of America, joined Jan 2006, 337 posts, RR: 1
Reply 6, posted (8 years 2 months 1 week 6 days ago) and read 2433 times:

Quoting Superhub (Reply 2):
Or do you mean earth coordinates?

LOL!!!!


User currently offlineFiaz From Canada, joined Mar 2005, 94 posts, RR: 0
Reply 7, posted (8 years 2 months 1 week 6 days ago) and read 2404 times:
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heres an easy way called the " take 2 away add 2"

a runway is numbered 23,,,Now whats the obosite of the runway numbered

well take 2 away from 2 = 0 , 3 + 2 = 5 ...there fore runway 05

samething with 33R 3 - 2 = 1 ,,, 3 + 2 = 5 .......therefore runway 15

hope that helps


User currently offlineRamerinianAir From United States of America, joined Nov 2003, 1486 posts, RR: 0
Reply 8, posted (8 years 2 months 1 week 5 days 23 hours ago) and read 2381 times:

The magnetis deviation is always changing. If you had a runway that was 080 degrees with a +14 deviation, it would be 094 degrees or runway 09. If the deviation changed to +15, then the heading would be 095 or runway 10.
SR



W N = my Worst Nightmare!!!!!
User currently offlineFlyDeltaJets From United States of America, joined Feb 2006, 1856 posts, RR: 2
Reply 9, posted (8 years 2 months 1 week 5 days 21 hours ago) and read 2310 times:
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Ok thanks now I have a little idea of how it works.

Quoting Superhub (Reply 2):
What do you mean by grid numbering?

I got that term from the article about the new runway it ATL. It said that the runways are numbered using a "grid" system.



The only valid opinions are those based in facts
User currently offlineScoliodon From India, joined Oct 2005, 217 posts, RR: 0
Reply 10, posted (8 years 2 months 1 week 5 days 20 hours ago) and read 2289 times:

Quoting Cubsrule (Reply 1):
Where there are more than 3 parallel runways, they are typically numbered in sets. All 5 runways at ATL are parallel, but the north complex is numbered 8-26, the middle 2 are 9-27, and the new runway is 10-28.

Yes, that's the way it works. In DFW there is a set of 18L(36R),18R(36L) and another set of 17L(35R),17C(35C),17R(35L).

As pointed out by other replies this heading is only the magnetic heading and not the true one.



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User currently offlineAlphafloor From Chile, joined Jun 2004, 1277 posts, RR: 40
Reply 11, posted (8 years 2 months 1 week 5 days 20 hours ago) and read 2273 times:

Quoting Fiaz (Reply 7):
heres an easy way called the " take 2 away add 2"

a runway is numbered 23,,,Now whats the obosite of the runway numbered

well take 2 away from 2 = 0 , 3 + 2 = 5 ...there fore runway 05

samething with 33R 3 - 2 = 1 ,,, 3 + 2 = 5 .......therefore runway 15

hope that helps

Interesting, didn't know this before. But this rule only works with rwys from 20 up to 36. For rwys from 01 up to 19 take you must inverse the rule 'add 2 and take 2 away', isn'it ? eg. rwy 16 add 2 to 1= 3 and take 2 to 6= 4 =>rwy 34.

...



Whatever
User currently offlineAlphafloor From Chile, joined Jun 2004, 1277 posts, RR: 40
Reply 12, posted (8 years 2 months 1 week 5 days 20 hours ago) and read 2264 times:

... errr.. and rwy 19 ? = rwy 37 ?????
and rwy 01 ???

[Edited 2006-05-19 09:38:15]


Whatever
User currently offlineBoeing747_600 From United States of America, joined Oct 1999, 1295 posts, RR: 0
Reply 13, posted (8 years 2 months 1 week 5 days 12 hours ago) and read 2115 times:

Quoting Alphafloor (Reply 11):
Interesting, didn't know this before. But this rule only works with rwys from 20 up to 36. For rwys from 01 up to 19 take you must inverse the rule 'add 2 and take 2 away', isn'it ? eg. rwy 16 add 2 to 1= 3 and take 2 to 6= 4 =>rwy 34.

A much simpler (and much more logical) rule would be to add 18 if the runway number is less than or equal to 18 and subtract 18 otherwise.

18 comes from the fact that the reciprocal direction is 180 degrees from the direction of the runway number in question.


User currently offlineOlympus69 From Canada, joined Jun 2002, 1737 posts, RR: 7
Reply 14, posted (8 years 2 months 1 week 5 days 8 hours ago) and read 2008 times:

Quoting Boeing747_600 (Reply 13):
A much simpler (and much more logical) rule would be to add 18 if the runway number is less than or equal to 18 and subtract 18 otherwise.

This works well for normal people, but for the average A.netter a pencil and paper would be required.  Smile


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