PPRuNe Forums

Go Back   PPRuNe Forums > Flight Deck Forums > Tech Log
Forgotten your Username/Password?

Tech Log The very best in practical technical discussion on the web


Reply
 
Thread Tools
Old 5th Apr 2011, 04:56   #1 (permalink)
 
Join Date: Mar 2005
Location: the left seat
Posts: 9
Parallel Runways

Here's a purely academic question folks

What is the mandatory minimum separation distance between parallel runways? Is there a minimum requirement for the thresholds to be staggered as well?

Appreciate any input or references.

Cheers
pilotgirl3 is offline   Reply
Old 5th Apr 2011, 05:05   #2 (permalink)
 
Join Date: Nov 2004
Location: on earth
Posts: 34
Yes there are minimum distances to be respected but I don't have the numbers.

I am sure of this because that's the main problem in DXB where they have 2 huge parallel runways and even staggered BUT not enough to be used as independent parallel runways.

So they have to respect some separation between landing aircraft on one runway and aircraft taking off from the parallel one...

You should find your answer somewhere in the ICAO document where the criteria for parallel runway operation must be specified.
scoteros is offline   Reply
Old 5th Apr 2011, 06:13   #3 (permalink)
 
Join Date: Aug 2009
Location: Up in the OFCR
Posts: 385
ICAO merely has recommendations regarding this issue, quoting from Annex 14 Volume 1 here:
Quote:
1035m for independent parallel approaches
915m for dependent parallel approaches
760m for independent parallel departures
760m for segregated parallel operations

except that:

a) for segregated parallel operations the specified minimum distance
-may be decreased by 30m for each 150 m that the arrival runway is staggered toward the arriving aircraft, to a minimum of 300m
-should be increased by 30m for each 150 m that the arrival runway is staggered away from the arriving aircraft

b) for independent parallel approaches, combinations of minimum distances and associated conditions other than those specified in the PANS-ATM (Doc 4444) may be applied when it is determined that such combinations would not adversely affect the safety of aircraft operations
The 'staggering' clause was the reason that Frankfurt tried using '26L' in parallel to 25R, displacing the actual threshold of 25L to allow for shorter separation... They gave it up though, too much fuzz.
STBYRUD is offline   Reply
Old 5th Apr 2011, 12:40   #4 (permalink)
 
Join Date: Mar 2005
Location: the left seat
Posts: 9
Parallel runways

STBYRUD

Thanks a ton.
pilotgirl3 is offline   Reply
Old 8th Apr 2011, 05:56   #5 (permalink)
 
Join Date: Apr 2004
Location: UK
Posts: 722
For ILS/PRM and LDA/PRM approaches the minimum distance between runways is 750 ft. Have a look at SFO 28L and R, the separation there must be close to the minimum and there is virtually no threshold stagger between the two runways.
Juan Tugoh is offline   Reply
Old 8th Apr 2011, 08:58   #6 (permalink)
 
Join Date: Mar 2005
Location: the left seat
Posts: 9
Parallel Runways

Will check. thanks!
pilotgirl3 is offline   Reply
Old 8th Apr 2011, 11:55   #7 (permalink)
 
Join Date: Feb 2000
Location: 500 miles from Chaikhosi, Yogistan
Posts: 2,781
FWIW, Calcutta, 150m apart, but staggered 1400m. (not that India is necessarily the best example of ICAO-ness )
compressor stall is online now   Reply
Reply
 
 
 


Thread Tools


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT. The time now is 11:22.


vBulletin® v3.8.7, Copyright ©2000-2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
1996-2012 The Professional Pilots Rumour Network