Muddydawg From Portugal, joined Jan 2003, 56 posts, RR: 0 Posted (11 years 10 months 3 weeks 4 days 14 hours ago) and read 3843 times:
Here maybe an oddball question for you. I have seen some pictures from various people here on A.net of 737-800 without winglets. I was told that all of the -800 have them. I have personally seen -800's with them. What gives??
Muddydawg From Portugal, joined Jan 2003, 56 posts, RR: 0
Reply 2, posted (11 years 10 months 3 weeks 4 days 11 hours ago) and read 3731 times:
I guess this is where my ignorance on the subject takes over. I know what they are and what they do. I guess my next question is why wouldn't you want them? Are we in a money issue? I see all the Continental birds don't have them while airlines like SAS have them. Any light on this subject?
Ikarus From United Kingdom, joined Jan 2001, 3524 posts, RR: 2
Reply 3, posted (11 years 10 months 3 weeks 4 days 9 hours ago) and read 3655 times:
First of all, originally the 738 wasn't offered with winglets at all. They were only offered 3-4 years ago for the first time. So any 738s manufactured before 1999 couldn't have them anyway, and any after that only if the airline specifically asked for them. New orders signed after 2000 could choose whether they want the option or not, I think. Some charter airlines were very eager (Hapag Lloyd, Air Berlin, South African - OK, not a charter, were among the first with winglets, I believe).
What does the issue boil down to? Initial purchasing costs, partly. But also the average duration of a flight. Winglets are most beneficial in cruise, therefore any flight that doesn't involve lengthy cruising doesn't really need them. Why would Ryanair want winglets on its fleet of 150 738s, for example, when most of their routes are shorter than 2 hours?
737lame From Norway, joined Apr 2001, 75 posts, RR: 4
Reply 4, posted (11 years 10 months 2 weeks 2 days 13 hours ago) and read 3355 times:
All the -700 and -800 on the market could have the vinglets retrofitted.
Fitting them requires a sheet metal work to the front and rear spar + the outher portion of the wing. This reworking is basically a strenghtening of the wing.
SAS do not have any -800 that have winglets.
To have a benefit of the winglets you must have flights over 3 - 3.5 hours to gain some fuel burn savings. The other fact that winglets do to a -800 wing is that it is stiffer and the aircrafts thend to be more stiffer in the air and not so "flexing".
Even the classic`s can now have the winglets retrofitted. A -300 have been retrofitted at AviationpartnerBoeing in the last months. This aircraft was first registered as LN-NOR, and was chozen to have the first winglets fitted due to the fact that this aircraft had been a part of Boeing`s -300 testbeds and that they had a very big amount of flight data on that specific individual.