gkirk
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UK CAA: A380 Wake Vortex Seperation Requirements

Mon Jan 16, 2006 10:11 pm

http://www.caa.co.uk/application.asp...plicationid=11&mode=detail&id=2110
The main points:

10nm between the A380 and any a/c following it on approach.
1 additional minute added on for departure spacing following an A380 departure
Minimum of 15nm radar seperation for all other phases of flight for an A380 and any other a/c at the same altititude of 1500ft below.


Overall, those who said the A380 would need the same amount of spacing as a B747 are absolutely wrong. A380 spacing nearly double that of the B747.
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cloudyapple
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RE: UK CAA: A380 Wake Vortex Seperation Requirements

Mon Jan 16, 2006 10:17 pm

Nothing new. CAA was just following ICAO which made the same recommendation a few weeks back. Also it clearly states in the ATSIN the aircraft is in development and that this spacing recommendation is not permanent. Please don't take sentences out of context or blow it out of proportion.
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overcast
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RE: UK CAA: A380 Wake Vortex Seperation Requirements

Mon Jan 16, 2006 10:17 pm

This is just the CAA repeating the ICAO recommendations, except these to refined once all the testing is complete.
 
BBJII
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RE: UK CAA: A380 Wake Vortex Seperation Requirements

Mon Jan 16, 2006 10:18 pm

I saw these figures a few days ago. Looks like the A380 could be ATC's worst nightmare...more so at Busy airport with Busy Airspace such as London.


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gkirk
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RE: UK CAA: A380 Wake Vortex Seperation Requirements

Mon Jan 16, 2006 10:20 pm

Quoting Cloudyapple (Reply 1):
Also it clearly states in the ATSIN the aircraft is in development and that this spacing recommendation is not permanent.

Which could mean it will be less or will be even more. Or it could just stay the way it is.
However, if it remains as the CAA have suggested, then the A380 will actually add to the congestion at airports such as LHR instead of reducing it. Thats the way I interprate the document, before anyone calls me anti Airbus or whatever  Wink
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gkirk
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RE: UK CAA: A380 Wake Vortex Seperation Requirements

Mon Jan 16, 2006 10:21 pm

P.S. Does anyone have a link to the ICAO recommendations? Cheers  Wink
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BestWestern
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RE: UK CAA: A380 Wake Vortex Seperation Requirements

Mon Jan 16, 2006 10:25 pm

Quoting Gkirk (Reply 4):
Thats the way I interprate the document, before anyone calls me anti Airbus or whatever

GKirk - you are such as whatever!  Smile
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cloudyapple
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RE: UK CAA: A380 Wake Vortex Seperation Requirements

Mon Jan 16, 2006 10:37 pm

As far as Heathrow is concern it may not be as big a problem people are suggesting. Remember it runs in segregated mode. The IC can keep it low on downwind out of the way of others and the FD can TEAM it on to the departure runway. Problem solved. Nimby complaints start flooding in.
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gkirk
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RE: UK CAA: A380 Wake Vortex Seperation Requirements

Mon Jan 16, 2006 10:42 pm

Quoting Cloudyapple (Reply 7):
Remember it runs in segregated mode.

I thought they were going to be changing that to dual ops mode alowing for arrivals and departures on each runway?
As for the NIMBY's , shoot them  Wink
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NAV20
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RE: UK CAA: A380 Wake Vortex Seperation Requirements

Mon Jan 16, 2006 10:59 pm

Quoting Gkirk (Reply 5):
P.S. Does anyone have a link to the ICAO recommendations?

I have a copy of the letter, but it isn't 'postable', it''s not from a website.

However I can confirm that the CAA's wording is the same as the ICAO's except in the matter of vertical spacing. The ICAO only recommended 'offset tracks' or 'additional vertical spacing' over the normal 1,000 ft., without specifying an amount. The CAA says 1,500 ft.

Both documents say that the whole matter is subject to a final determination later this year.
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cloudyapple
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RE: UK CAA: A380 Wake Vortex Seperation Requirements

Mon Jan 16, 2006 11:14 pm

Quoting Gkirk (Reply 8):
changing that to dual ops mode

The final timing has not been decided yet. It should happen in 2-3 years' time.

For each 10Nm spacing pair you lose 4 arrivals slots in segregated mode unless you TEAM but you lose nothing in mixed mode because you can shoot more than 1 (probably 2-3) departures in the 10Nm gap. Some clever departure sequencing required.

[Edited 2006-01-16 15:18:04]
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whitehatter
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RE: UK CAA: A380 Wake Vortex Seperation Requirements

Mon Jan 16, 2006 11:32 pm

It is just preliminary stuff. The 747 had similar directives when it was being tested, but eventually the minimums were revised in line with operational experience.

Worth noting too that initial data was done using the unmodified A380 wing which had a turbulence problem affecting the rear stabiliser. Redesigning the canoes and associated surfaces deals with that problem, and will additionally reduce further the wake turbulence the wing produces.
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glacote
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RE: UK CAA: A380 Wake Vortex Seperation Requirements

Tue Jan 17, 2006 1:19 am

Quoting Gkirk (Thread starter):
Overall, those who said the A380 would need the same amount of spacing as a B747 are absolutely wrong. A380 spacing nearly double that of the B747.

And those who jump on anything that can be used to bash the A380 still make fool of themselves.

Nice try - but instead of serving perished and already debunked FUD please bak up your claims with facts next time.
 
gkirk
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RE: UK CAA: A380 Wake Vortex Seperation Requirements

Tue Jan 17, 2006 2:05 am

Quoting Glacote (Reply 12):
Nice try - but instead of serving perished and already debunked FUD please bak up your claims with facts next time.

The figures in the CAA, although they may not be the final figures, prove that this isn't rubbish, so I suggest you stop trying to start an A vs B fight.
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ikramerica
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RE: UK CAA: A380 Wake Vortex Seperation Requirements

Tue Jan 17, 2006 2:08 am

Quoting Cloudyapple (Reply 7):
As far as Heathrow is concern it may not be as big a problem people are suggesting. Remember it runs in segregated mode. The IC can keep it low on downwind out of the way of others and the FD can TEAM it on to the departure runway. Problem solved. Nimby complaints start flooding in.

Problem solved? Hardly. You see, if it takes special ops to make it not delay anything, then it's a solution, yes, but you could apply that solution to OTHER jets, and their effective spacing also drops. You aren't making the A380 like other jets in this regard, you're just finding a way to make it not worse, but from this solution, it seems LHR would be better off doing this for ALL operations, as it would free up more coveted landing and takeoff slots at premium times of day.

So, why aren't they doing it already? Is it a matter of noise? If so, the A380 is quiet, so it shouldn't be a problem, but the other jets shifted around might, no?

It'll be interesting to see if Airbus lobbies for 10nm spacing during the testing of the 748. Just to make it fair.

Quoting NAV20 (Reply 9):
Both documents say that the whole matter is subject to a final determination later this year.

That was the important part from day 1.
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