Petertenthije From Netherlands, joined Jul 2001, 3464 posts, RR: 11
Reply 1, posted (7 years 10 months 5 days 11 hours ago) and read 9941 times:
1) that is an optical illusion. The next photo in the sequence shows there is a gap between the flap and the door, ver tiny though. http://www.airliners.net/open.file?id=0863718&size=L
2) That is correct, and explained in the pictures caption, the extra space was needed for the ram air turbine.
Tomcat From Belgium, joined Sep 2000, 181 posts, RR: 0
Reply 3, posted (7 years 10 months 5 days 7 hours ago) and read 9329 times:
Quoting Moo (Reply 2): Yup, the gear door is fully open and it looks like there is a rubber strip along the inner edge of the flap for precisely that reason.
I would rather think that the main reason for having that seal is to seal the gap between the body fairing and the inboard edge of the flap once retracted. The reason being to minimise the flow between the lower side of the wing (pressure side) and the upper side (suction side). These are common design features aiming at reducing the parasitic drag of an airliner in cruise conditions.
The external surfaces of an aircraft are classified in various categories according to their influence on the overall parasitic drag. The more they may influence the parasitic drag generation, the more severe the design requirements are (namely "steps and gaps requirements"). To give an example, the acceptable step between to skin panels in the leading edge area is much smaller than on the rear fuselage. You could apply the same severe requirements on the whole structure but you would end with a lot of extra cost with no significant gain (valuable gain) on the parasitic drag, hence that classification.
Jacobin777 From United States of America, joined Sep 2004, 14990 posts, RR: 59
Reply 5, posted (7 years 10 months 5 days ago) and read 8719 times:
I would have to say its probably a parallax....in this photo, on could clearly see there is a space between the two...and because of the size of the plane, the distance seems small but in reality there is probably more than enough clearing space..
Claude From France, joined Aug 2005, 75 posts, RR: 0
Reply 9, posted (7 years 10 months 4 days 14 hours ago) and read 5986 times:
Hi Concorde Boy, i promised you everything's allright between inboard flaps and body landing gears doors )
And i don't what i'm speaking about )
look the inner side of the flap, you can see a "join", it can be shake by the doors, no problems.
FAEDC3 From Ecuador, joined Jun 2007, 163 posts, RR: 0
Reply 12, posted (7 years 10 months 4 days 6 hours ago) and read 1974 times:
I think that is important to note that the doors, eventhough seem to touch, in reality they might but for a few instants. The time that the gear bay doors take to open/close are only a few seconds, in that time the door opens, and gets very close to the flap indeed; but then it closes again after letting the gear either in or out. That time I think is so marginal, it shouldn't be a aerodynamics issue.