i was reading a post in the civil aviation forum regarding that a CX743 built towards the end of the production time, they said that they had incorporated a few of the features of 744 into 743 and one of them was the leading edge.........i was wondering...what is the difference between the leading edge of a 744 and a 743??? can you tell the difference visually????
here is a pic of a retired CX743 with a 744 leading dege....
Where the wing joins the fuselage, there is a fairing to smoothen out the angle between the two. This applied to all -400s and late model -300s as B-HON is in this photo. On older 747s, the wing root simply joins the fuselage at a larger angle with no major attempt at blending the two surfaces.
That was very much a laymans explanation of it all. To get a decent answer, you should look for an engineer!!
Hi Cathay Pacific - I presume your enquiry on leading edges was mainly about the wing/fuselage fairing, but another difference, made possible by the -400's greater wingspan, is that the -400 has 6 leading edge flap segments outboard of the outer engines, whereas the other versions have only 5. Trailing edge flaps are essentially the same on all versions except of course the SP; note the lack of flap track fairings on this variant, which has single slotted flaps as opposed to the usual and more complex triple slotted fowler flaps. Regards - Musang.