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Boat tail patent
here is a patent illustration for an extensible boat tail,advocated by Wolf H.Hucho,dating to the mid-1930s by Koenig-Fachsenfeld.What's old is new again
http://patentimages.storage.googleap...228-D00000.png
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Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
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