[Robert A Cook PE]

I'm not sure I agree with the "difficultly" or novelty of the engineering: looks like a scaled up version of the bi-sectioned planes flying since the early B-29's were converted after WWII.

Difficult and rigorous engineering certainly.

[sharpee]

There was another article that mentioned that the hinge with the hydraulics was being developed in Italy. There is an AIRBUS plane used for a similar function but on that plane the hydraulics need to be disconnected to open the door. I could not find that article.