Then, the only problem is to decide what is "necessary". And that is where people disagree.
Anyway, I don't want to take space and time on this forum to divert your topics to "unwanted" area. I respect your right to select and protect your discussions according to your intrests and your area of expertise. (Did I say it right?)
However, I have a question of a more technical nature that professionals in this forum may help me answer.
Amelin has posted some information and a couple of pictures on the structural strength of an airplane similar to TU-154 - see here:
Google Tłumacz .
It suggests that large airplanes have some sort of a solid, massive frame that runs along the fuselage. This frame is needed to provide secure connection with wings and the tail sections with the engines. It holds the whole structure together and provides safety to passangers and crew (for example, seats may be securely fastened to the frame through the floor).
If this is true, the "frame" itself must be a rather large and sturdy part of the structure.
Ami then explains that in the TU-154 accident, the entire front of the plane disintegrated. As the A/C was inverted during the impact, the roof and sides of the fuselage were practically stripped off and torn into small pieces. This explains why there is no fuselage on the pictures from the crash scene. But, there should be a frame or at least large fragments of it. I tried to find anything that would resemble such a frame or parts of it in the pictures and videos available but could not find anything.
My questions are:
1. Is there a solid frame (sort of a spinal cord) in a TU-154?
2. If yest, could it just desintegrate and disappear during an accident like this?
3. Or, am I missing something in the pictures and videos that are online?
See the video here:
Sk?adaj? Tupolewa ze szcz?tków. Zobacz unikatowe zdj?cia - Polska - Informacje - portal TVN24.pl - 16.04.2010
showing all the parts being prepared for re-assembly.
Bielec