Zionstrat From United States of America, joined Apr 2001, 226 posts, RR: 1 Posted (10 years 7 months 1 week 6 days 15 hours ago) and read 1438 times:
I'm sure this will be an easy one for anyone with familiar with 737 technology, however I noticed a 'mini' flap for lack of better words on a recent flight and would like to understand it's purpose and operation-
If you look at the "main" outboard flap, there is a smaller extension on the trailing edge that seems to extend before the main flap extends. At take off, it appears that it is primarily this 'mini' flap that is extended, while the "main" flap also extends at higher settings-
Here's a picture in case I'm not explaining well- It is the final "segment" of this flap that is extended in this picture.
A/c train From United Kingdom, joined Jun 2001, 501 posts, RR: 5 Reply 1, posted (10 years 7 months 1 week 6 days 13 hours ago) and read 1314 times:
This I believe is just a triple slotted flap, this increases camber and adds lift for takeoff and also acts to slow the a/c down on approach, clever bit of kit!!
regards
a/c
OPNLguy From , joined Dec 1969, posts, RR: Reply 2, posted (10 years 7 months 1 week 6 days 12 hours ago) and read 1308 times:
A/C nailed it, just Boeings choice of design versus the "barn door" type that are found on DC-9s/MD-80s etc. The three sections are known as the fore flap, the mid flap, and the the aft flap.
FYI, Only the -100 thru -500 have triple-slotted trailing edge flaps like these, and all the NG variants (-600 thru -900) have a double-slotted design that was an improvement over the old.
David B. From United States of America, joined Jun 2001, 3148 posts, RR: 7 Reply 3, posted (10 years 7 months 1 week 6 days 12 hours ago) and read 1298 times:
What is that little thing at the end with what looks like a little hole in it?
Its pointing towards the plane.
Sabenapilot From Belgium, joined Feb 2000, 2663 posts, RR: 51 Reply 6, posted (10 years 7 months 1 week 6 days 12 hours ago) and read 1285 times:
Mr Spaceman,
From an ex-B737 pilot, the B737 can not dump fuel!!!
David B.,
The little thing at the end of the wing pointing towards the plane is nothing more then the logo light.
It points at the tail and is switched on during night to make some publicity...
OPNLguy From , joined Dec 1969, posts, RR: Reply 7, posted (10 years 7 months 1 week 6 days 12 hours ago) and read 1278 times:
>>>If the pilots have to dump fuel for an emergency landing, etc, this is where it flys out! I should be able to find a photo.
I wish you luck, since the 737 doesn't have a fuel dump system...
The item that Davod B is curious about is called a "logo" light, and it is indeed pointed towards the aircraft. In fact, it's specifically aimed to illuminate the entire vertical stabilizer of the aircraft, so better night ID of aircraft, as well as showing the airline's logo for promotional purposes. There's also one on the opposite wingtip. Some larger aircraft (the 747 is one that comes to mind) have theirs imbedded on the top side of the horizontal stabilizers on each side, shining up from there.
Not all aircraft have logo lights, and on Boeing's at least, they are an option....
Sabenapilot From Belgium, joined Feb 2000, 2663 posts, RR: 51 Reply 10, posted (10 years 7 months 1 week 6 days 11 hours ago) and read 1255 times:
Global village?
I'd say open university!
Over the last few months I have replied to numerous technical questions related to the B737. In most (but not all) cases they came from HAWK21. It seems to me some guys are doing their type rating course on this forum.... or at least they let others answer their test questions.
Anyway, I'm glad I could help you all out guys...
Keep the questions comming!
Mr Spaceman From Canada, joined Mar 2001, 2777 posts, RR: 18 Reply 12, posted (10 years 7 months 1 week 6 days 10 hours ago) and read 1249 times:
Hi guys,
Well, now that I've pulled my head out of my ass, I can say to David B. --- I'm sorry about that!
I'm sure glad I stated that I "Believed" it was for dumping fuel, instead of "I'm sure it's for dumping fuel". It's been made very clear to me that I believed WRONG! Thanks guys for straightening that out.
That logo light (in the photo) sure looks like a hole in the wingtip fairing (where fuel would be dumped) and not a light, because it's so dark.
Also, thanks for wishing me luck in finding pics of a 737 dumping fuel, but as I'm sure you know, I didn't find any. In fact, I couldn't find any photos of any type of airliner jettisoning fuel. I've seen many photo's of this on Airliners.net. I wonder what the keywords are?
Not to go way off topic about the 737's flaps, but, can someone tell me why a 737 doesn't have the ability to dump fuel? Could it be that the jet's Maximum Gross T/O and Landing weight's are almost identical?
Cdfmxtech From United States of America, joined Jul 2000, 1335 posts, RR: 34 Reply 14, posted (10 years 7 months 1 week 6 days 9 hours ago) and read 1238 times:
UR correct (Max TO weight and Landing weights are very close to one another - therefore no need for fuel jettison).
Mr Spaceman From Canada, joined Mar 2001, 2777 posts, RR: 18 Reply 16, posted (10 years 7 months 1 week 3 days 11 hours ago) and read 1147 times:
Hi guys.
Thanks for letting me know that the nearly identical Maximum Gross T/O and Landing weights of the 737 is the reason why it doesn't have a fuel dumping system. The Boeing 777 sure isn't in the same boat. According to an article I'm reading, it can takeoff at Maximum Gross Weight and fly for 11 hrs before it reaches it's certified Maximum Landing Weight of 460,000 pounds. The 777 definetly needs the ability to dump fuel.
Question: In the photo of the Fokker F-28 below, is the red circle on the aft edge of the farthest wing fairing, a Logo Light?
NKP S2 From United States of America, joined Dec 1999, 1714 posts, RR: 7 Reply 17, posted (10 years 7 months 1 week 3 days 5 hours ago) and read 1136 times:
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