FlyDeltaJets
Topic Author
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Joined: Thu Feb 02, 2006 4:24 pm

Runway Numbering

Fri May 19, 2006 10:21 am

How does the grid numbering system work?
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Cubsrule
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RE: Runway Numbering

Fri May 19, 2006 10:31 am

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.
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superhub
Posts: 398
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RE: Runway Numbering

Fri May 19, 2006 11:04 am

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?
 
timz
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RE: Runway Numbering

Fri May 19, 2006 11:15 am

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.
 
cptspeaking
Posts: 567
Joined: Mon Apr 24, 2006 2:49 pm

RE: Runway Numbering

Fri May 19, 2006 11:25 am

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

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ANCFlyer
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RE: Runway Numbering

Fri May 19, 2006 11:50 am

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.
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comairguycvg
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RE: Runway Numbering

Fri May 19, 2006 12:36 pm

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

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fiaz
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RE: Runway Numbering

Fri May 19, 2006 1:03 pm

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
 
ramerinianair
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RE: Runway Numbering

Fri May 19, 2006 1:24 pm

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.
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FlyDeltaJets
Topic Author
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RE: Runway Numbering

Fri May 19, 2006 4:05 pm

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
 
scoliodon
Posts: 212
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RE: Runway Numbering

Fri May 19, 2006 4:23 pm

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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alphafloor
Posts: 1265
Joined: Tue Jun 08, 2004 12:36 am

RE: Runway Numbering

Fri May 19, 2006 4:34 pm

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
 
alphafloor
Posts: 1265
Joined: Tue Jun 08, 2004 12:36 am

RE: Runway Numbering

Fri May 19, 2006 4:36 pm

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

[Edited 2006-05-19 09:38:15]
Whatever
 
Boeing747_600
Posts: 605
Joined: Tue Oct 19, 1999 4:01 am

RE: Runway Numbering

Sat May 20, 2006 12:52 am

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.
 
Olympus69
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RE: Runway Numbering

Sat May 20, 2006 4:37 am

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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