PJ2;
I'm an engineer but not particularly knowledgeable about structures. At first sight, the rear frame appeared to me to be more complex than I felt to be functional. Next, I realized that this picture explains how the THS is assembled to the fuselage. The top and bottom thirds of the frame are one-piece forgings or castings, and are permanently fixed to the fuselage skin and stringers. The connecting parts between them are removable. I suggest these 8 removable elements need to be removed to put the THS in its place, and are then re-installed to attach the THS to the fuselage. Does that make sense?
Last edited by HazelNuts39; 30th April 2011 at 22:38.