On Sun, 23 Aug 2015 17:53:21 -0500, clairbear <clairbear@msn.com> wrote:
>spirit@stlouis.invalid (Charles Lindbergh) wrote in news:XqSkx.108852
>$eJ6.102111@fx10.iad:
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>> begin 644 Stipa Caproni.jpeg
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>> Attachment decoded: Stipa Caproni.jpeg
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>Wow a flying wind tunnel
Also known as a ducted fan. Considering it was built in 1932, it was revolutionary and quite influential. See:
https://en.wikipedia.org/wiki/Stipa-Caproni
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