36r
Topic Author
Posts: 55
Joined: Wed Dec 19, 2001 10:46 pm

Domestic 744

Sat Mar 03, 2001 12:15 am

Any ideas as to why JAL and ANA do not have winglets on their 747-400 for their domestic routes?
 
CX Flyboy
Posts: 6007
Joined: Sun Dec 26, 1999 6:10 pm

RE: Domestic 744

Sat Mar 03, 2001 2:33 am

The winglets only save fuel on longer haul flights. On short haul flights they only really add to the weight of the aircraft and do not provide a significant fuel (money) saving, so they had them removed.
 
XXXX10
Posts: 702
Joined: Mon Jan 03, 2000 7:10 am

RE: Domestic 744

Tue Mar 06, 2001 12:07 am

I believe that the winglets can be retro-fitted so that once an aircraft is older it can be used on long hall flights and gain the fuel savings
 
A40-TY
Posts: 137
Joined: Wed Apr 05, 2000 4:18 am

RE: Domestic 744

Tue Mar 06, 2001 3:36 am

The 747-400D model does not require winglets as these features are fitted (to standard 747-400's) to save fuel and improve performance.
The 747 Domestic's are used on the busy Tokyo-Osaka routes in Japan, amongst other busy internal services. The range therefore of the 'Domestic' aircraft is only about 4000km, there is therefore no need to have extensive fuel and performance related features, as opposed to the normal 747-400.
However, the 747-400D has been built in such a way as that in future, these aircraft can be modified to serve longer haul routes, which would mean installing the winglet features and increasing fuel capacity, as well as extensive cabin refurbishment.
With so many short haul cycles on the airframe, the aircraft would be able to operate on long haul services for a considerable amount of time for their remaining economic lives.
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