Why does Concordes nose droop down?
Because of its needle shaped design, the pilots would not be able to see the runway during take-off and landing. So to help improve the view the nose is drooped down to 5 degrees for take-off and 12.5 degrees for landing, where the aircraft is pitched up at a very high angle of attack. Initially the droop for landing was to be 17.5 degrees but this was found to be too low, as the nose was down right out of view and did not give the pilots a visual point of reference.