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Mortyman
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Posts: 4118
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First With 'green Landings' SAS

Thu Nov 09, 2006 7:29 pm

First with 'green landings'

Scandinavian airline SAS has begun novel tests with reduced engine power to reduce noise and pollution.


Scandinavian airline SAS has begun novel tests with reduced engine power to reduce noise and pollution.
Norway's division, SAS Braathens, said that they will likely begin testing such environmentally friendlier landings next year. SAS Sweden began such tests in January 2006.

According to Swedish newspaper Aftonbladet, SAS is the first airline in the world to make such landings, which are similar to a glide into the airport. If all of SAS planes make such landings the company can reduce emissions equivalent to those from 20,000 automobiles in a year.

"We have as yet not carried out such landings in Norway, but we are definitely watching with interest what our Swedish colleagues have done. They can demonstrate very exciting results," SAS Braathens communication director Cathrine Foss Stene said.

The main advantage of such landings are pollution reduction, but noise reduction is also achieved.

"We are now studying the Swedish results to see if this should be tested with us. It may be relevant by next year," Stene said.

(Aftenposten English Web Desk/NTB)


http://www.aftenposten.no/english/local/article1526475.ece
 
jonty
Posts: 221
Joined: Fri Jul 30, 2004 3:10 am

RE: First With 'green Landings' SAS

Thu Nov 09, 2006 7:42 pm

are engines not normally kept at a higher power setting on landing in case the plane needs to go around? in that case could this not be dangerous?
 
cloudyapple
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RE: First With 'green Landings' SAS

Thu Nov 09, 2006 8:12 pm

Not first in the world - CDA (continuous descent approach) is in use at many other airports - mostly noise sensitive ones like Amsterdam and Heathrow (trial). Engines are left in idle power and no level off instructions from ATC - you basically fly the published vertical profile.
A310/A319/20/21/A332/3/A343/6/A388/B732/5/7/8/B742/S/4/B752/B763/B772/3/W/E145/J41/MD11/83/90
 
FFlyer
Posts: 552
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RE: First With 'green Landings' SAS

Thu Nov 09, 2006 8:38 pm

I have experienced a "glide-in" approach and landing a few (?) times on early morning arrivals at CDG from the US. Most often on DL from JFK. Continuous, smooth descent up to the touch-down. This descent was started already some 45 - 60 minutes before the actual landing. Somehow beautiful in an early morning sunrise.
 
scoliodon
Posts: 212
Joined: Mon Oct 31, 2005 4:15 pm

RE: First With 'green Landings' SAS

Thu Nov 09, 2006 10:38 pm

Quoting FFlyer (Reply 3):
"glide-in" approach and landing

Experienced a similar one..a silent smooth approach and a smoother landing on an LH A343 from DFW-FRA.
JFK-LGA-EWR-DTW-IND-PHX-CLE-SFO-LAS-SEA-ORD-MCO-MIA-DFW-ATL-CDG-FRA-BOM-MAA-DEL-TRZ-DXB-CLT-CVG-DEN-MSP
 
cloudyapple
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RE: First With 'green Landings' SAS

Thu Nov 09, 2006 11:07 pm

Quoting Scoliodon (Reply 4):
LH A343 from DFW-FRA

Frankfurt has indeed published CDA procedures. Your experience may well have been a CDA Approach.
A310/A319/20/21/A332/3/A343/6/A388/B732/5/7/8/B742/S/4/B752/B763/B772/3/W/E145/J41/MD11/83/90
 
David L
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Joined: Tue May 18, 1999 2:26 am

RE: First With 'green Landings' SAS

Thu Nov 09, 2006 11:30 pm

More details on CDA here:
"Automatic Computer Control" Into SFO? (by Timz Oct 7 2006 in Tech Ops)
 
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Mortyman
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RE: First With 'green Landings' SAS

Thu Nov 09, 2006 11:46 pm

So, why is SAS claiming to be the first............Strange, I'd expect them to know whats old and new .............
 
BoeingOnFinal
Posts: 440
Joined: Fri Apr 14, 2006 6:47 am

RE: First With 'green Landings' SAS

Thu Nov 09, 2006 11:57 pm

Quoting Jonty (Reply 1):
are engines not normally kept at a higher power setting on landing in case the plane needs to go around? in that case could this not be dangerous?

There is a difference between "flight idle" and "ground idle". Talking about 737 in this case, but assuming that this is the same for other aircrafts due to safety. "Flight idle" has a slightly higher N1% than "ground idle", because ,as you mentioned, a go-around might me necessary, and "flight idle" gives faster spool-up time.
norwegianpilot.blogspot.com

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