Re: Smile of the day - What is yours?
There was a guide telling a facts about the blackbird. How they only just put enough full in it to take off as when it's on the ground it leaks. It had to be designed to stretch. All the panels and threads are a loose fit. Once in the air it's fuelled up. Then swoops down and picks up speed to mach 3. The heat generated turns the black body blue and the fuselage stretches a yard. Pretty clever engineering. He also said how in active service one was fired upon with a missile. The air tower informed the pilot who looked out of his window and matched the missiles speed keeping it the same distance away until it used it's fuel and fell away.
Had a good day out.
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