The Concorde supersonic jet stretched during flight due to the heat it generated. On its final flight the crew placed their hats into a crevice in the floor which appeared during the flight, as the aircraft cooled the crevice closed, perman

The Concorde supersonic jet stretched during flight due to the heat it generated. On its final flight the crew placed their hats into a crevice in the floor which appeared during the flight, as the aircraft cooled the crevice closed, perman