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  #11  
Old 09-21-2010, 02:31 AM
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Here's the clearest/simplest photographic example i could find of a flying buttress that fits the general description of the "bastille fins"

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  #12  
Old 09-21-2010, 12:40 PM
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Roy, that *does* look like that general fin planform shape. The fins on the Soviet GIRD rocket (in the photo that jharding58 posted in Reply #7) also resemble that, as do the fins on the Whistling Gemini and Whistling Jupiter firework missiles (two photos of these are attached below).
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Old 09-21-2010, 08:58 PM
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According to the Dictionary of Military Architecture a Bastille was a siege tower (also called a breaching tower) which could be rolled up against the defensive walls, a crossing ramp dropped within a covered cantilever, and thence the siege effected upon the beseiged. But I would still go with Roy's.
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