EMBQA From United States of America, joined Oct 2003, 9286 posts, RR: 13 Reply 1, posted (7 years 6 months 3 weeks 5 days 3 hours ago) and read 3674 times:
They are just rain gutters that prevent rain water from getting in the door ways when the doors are open...
[Edited 2005-10-31 02:20:44]
"It's not the size of the dog in the fight, but the size of the fight in the dog"
Mir From United States of America, joined Jan 2004, 19714 posts, RR: 56 Reply 2, posted (7 years 6 months 3 weeks 5 days 3 hours ago) and read 3618 times:
Quoting EMBQA (Reply 1): They are just rain gutters that prevent rain water from getting in the door ways when the doors are open...
Not too much of an issue when using a jetway to board, but it makes a big difference when you're using open stairs.
-Mir
7 billion, one nation, imagination...it's a beautiful day
ChiGB1973 From United States of America, joined Mar 2004, 1605 posts, RR: 1 Reply 3, posted (7 years 6 months 3 weeks 5 days 2 hours ago) and read 3617 times:
Makes a big difference with a jet bridge at many places. At TZ, I noticed it kept a lot of water out. They are not an exact fit in most places. Of course, could have been the bridge operator too.
EMBQA From United States of America, joined Oct 2003, 9286 posts, RR: 13 Reply 4, posted (7 years 6 months 3 weeks 5 days 2 hours ago) and read 3584 times:
Quoting Mir (Reply 2): Not too much of an issue when using a jetway to board
Not really true as jetways do not offer a rain tight seal.
"It's not the size of the dog in the fight, but the size of the fight in the dog"
Jsposaune From United States of America, joined Oct 2005, 291 posts, RR: 1 Reply 5, posted (7 years 6 months 3 weeks 5 days 1 hour ago) and read 3506 times:
Quoting EMBQA (Reply 1): They are just rain gutters that prevent rain water from getting in the door ways when the doors are open...
Correct, but more specifically, they prevent de-icing fluid from running down over the doors. Type I deicing fluid, heated to upwards of 170 degrees will damage door seals. De-icers are trained to spray the top of the fuselage, not directly at the door. Those little ridges will deflect the fluid away from the sensitive areas.
Hope that helps...
(first a.net post, by the way...hello, everybody!)
There are no stupid questions....only stupid people!!!
Kaitak744 From United States of America, joined Jul 2005, 2208 posts, RR: 3 Reply 6, posted (7 years 6 months 3 weeks 5 days 1 hour ago) and read 3479 times:
Yup! thanks, that surely helped.
Quoting Jsposaune (Reply 5): (first a.net post, by the way...hello, everybody!)
LegendDC9 From , joined Dec 1969, posts, RR: Reply 7, posted (7 years 6 months 3 weeks 4 days 22 hours ago) and read 3410 times:
Quoting Jsposaune (Reply 5): De-icers are trained to spray the top of the fuselage, not directly at the door.
HA! That has to be one of the most optimistic comments regarding airport training I have ever heard. I would say I have seen it closer to: Here, deice this and keep it away from your nose and mouth.
Jsposaune From United States of America, joined Oct 2005, 291 posts, RR: 1 Reply 9, posted (7 years 6 months 3 weeks 4 days 12 hours ago) and read 3204 times:
Quoting LegendDC9 (Reply 7): Here, deice this and keep it away from your nose and mouth.
Hehe...I seem to remember my training a few years back...it included the question "um...you're not afraid of heights, are you?!?!"
Heck..a little type 1 never hurt anybody, as long as you don't make cocktails with it!!!
There are no stupid questions....only stupid people!!!
KC135TopBoom From United States of America, joined Jan 2005, 11708 posts, RR: 52 Reply 10, posted (7 years 6 months 3 weeks 4 days 12 hours ago) and read 3193 times:
Quoting Jsposaune (Reply 5): Quoting EMBQA (Reply 1):
They are just rain gutters that prevent rain water from getting in the door ways when the doors are open...
Correct, but more specifically, they prevent de-icing fluid from running down over the doors. Type I deicing fluid, heated to upwards of 170 degrees will damage door seals. De-icers are trained to spray the top of the fuselage, not directly at the door. Those little ridges will deflect the fluid away from the sensitive areas.
Hope that helps...
(first a.net post, by the way...hello, everybody!)
That is correct, and welcome aboard.
Quoting ChiGB1973 (Reply 3): Makes a big difference with a jet bridge at many places. At TZ, I noticed it kept a lot of water out. They are not an exact fit in most places. Of course, could have been the bridge operator too.
The jet bridge awning will also collect rain water, but often is not sealed against the aircraft, thus the gutters still are useful.
HPRamper From United States of America, joined May 2005, 3662 posts, RR: 8 Reply 11, posted (7 years 6 months 3 weeks 4 days 11 hours ago) and read 3140 times:
On the picture of that ANA plane you can clearly see the imprints where the jetway sits against the aircraft. Very strange, the jetway must be filthy.
Positiverate From United States of America, joined May 2005, 1590 posts, RR: 9 Reply 12, posted (7 years 6 months 3 weeks 4 days 10 hours ago) and read 3096 times:
One addendum: I have been told that the gutters are positioned at the angle the airflow goes over the airframe at that point. Thusly, they provide minimal if no drag.
Andz From South Africa, joined Feb 2004, 8298 posts, RR: 11 Reply 13, posted (7 years 6 months 3 weeks 4 days 9 hours ago) and read 3032 times:
Quoting Positiverate (Reply 12): One addendum: I have been told that the gutters are positioned at the angle the airflow goes over the airframe at that point. Thusly, they provide minimal if no drag.
Not sure about that, if you look closely at some aircraft you will see they angle in both directions over different doors.
After Monday and Tuesday even the calendar says WTF...
HAWK21M From India, joined Jan 2001, 31201 posts, RR: 58 Reply 14, posted (7 years 6 months 3 weeks 3 days 20 hours ago) and read 2940 times:
Quoting Positiverate (Reply 12): I have been told that the gutters are positioned at the angle the airflow goes over the airframe at that point. Thusly, they provide minimal if no drag
Its more to do with the Aircraft Pitch on Ground & the Fuselage surface.
regds
MEL
474218 From United States of America, joined Oct 2005, 6340 posts, RR: 9 Reply 15, posted (7 years 6 months 3 weeks 3 days 14 hours ago) and read 2870 times:
On the early L-1011's the rain gutters over the two forward doors were parallel with the top of the door. At some point (I don't know where) they were installed at an angle, with the front being lower than the back. This was done to improve drainage.
OldAeroGuy From United States of America, joined Dec 2004, 3206 posts, RR: 66 Reply 16, posted (7 years 6 months 3 weeks 3 days 13 hours ago) and read 2846 times:
Quoting HAWK21M (Reply 14): Its more to do with the Aircraft Pitch on Ground & the Fuselage surface.
No, it really is a reflection of the local surface streamlines in cruising flight.
Airplane design is easy, the difficulty is getting them to fly - Barnes Wallis
CCA From Hong Kong, joined Oct 2002, 708 posts, RR: 14 Reply 18, posted (7 years 6 months 3 weeks 2 days 18 hours ago) and read 2664 times:
Quoting HAWK21M (Reply 17): I still feel its required while on Ground & not in Flight.For Eg Take the B737 Fwd Door Gutters.
regds
Exactly, it is inline with the local airflow in flight, just ask yourself where are A/C designed to be for the majority of their life on the ground or in flight?
The 747 is the perfect example to show the local airflow in flight. Door 1 from the minimal effect over the nose, Door 2 from the bow wave of the wing, Door 3 inline with the air flow over the wing, Door 4 as the flow evens out and Door 5 is even set up for the bow wave flow for the stabilizer. Even the main deck cargo door and it's negative pressure relief valve doors are done.
LongbowPilot From United States of America, joined Jan 2005, 577 posts, RR: 4 Reply 19, posted (7 years 6 months 3 weeks 1 day 23 hours ago) and read 2537 times:
Quoting LegendDC9 (Reply 7): HA! That has to be one of the most optimistic comments regarding airport training I have ever heard. I would say I have seen it closer to: Here, deice this and keep it away from your nose and mouth.
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