For anyone who hasn’t heard this one: When the Concorde flew at supersonic speeds, the airframe got hot enough that it expanded about a foot longer than it was on the ground. This opened up a small gap between the flight engineer’s console and the rear bulkhead of the cockpit. On each plane’s final flight, the flight engineers stuffed their hats into the gap, which then closed up after cooling off.
For anyone who hasn’t heard this one: When the Concorde flew at supersonic speeds, the airframe got hot enough that it expanded about a foot longer than it was on the ground. This opened up a small gap between the flight engineer’s console and the rear bulkhead of the cockpit. On each plane’s final flight, the flight engineers stuffed their hats into the gap, which then closed up after cooling off.