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Many years ago I read a book about the development of the Spitfire. It was a miracle it ever got made. It started out as a sea plane. The first ones had fixed pitch wooden props. They experimented with the comparative drag of flush rivets vs round heads by gluing halves of peas over the flush rivets and blowing smoke over the wing. After reading so much about it, the first time I saw a Spitfire fly it was almost a religious experience. It is a beautiful and fascinating airplane.
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