Originally Posted by
Dr Jekyll
What specifically caused the Concorde to go out of control when it did?
I've heard 3 versions. That it was barely at flying speed when it took off and there was a further loss of engine power. That the fire from the front fuel tank move the C of G (already a bit too far back) to move even further. Or that the fire burned through the hydraulics.
The third one sounds most plausible to me but opinions vary.
Probably best for you to read the official investigation report carried out by the French BEA. You can easily access it by Internet search.