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Old 09-23-2009, 09:52 AM
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blackshire blackshire is offline
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Join Date: Jan 2009
Location: Fairbanks, Alaska
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Default "Bastille-style" rocket fins?

Hello All,

I have a vocabulary question. The Centuri Sky Devil kit (see: http://www.oldrocketplans.com/centu...10/cenKB-10.htm ) had several different fin planform options. One of the fin shapes (the one shown on the kit card, on the front of the instructions, and in the catalog illustrations) is called the "Bastille." It looks like the "trailing delta" fin type that is used on the plastic fin units of fireworks missiles. (The old "Dirty Bird III" model rocket plan used one of these fireworks missile fin units.)

I'm curious as to why this fin shape is called the Bastille style. It has nothing (as far as I know) to do with the famous fortress-prison of that name that once existed in Paris. (The word means "bastion" or "castle" in English.) Calling this fin shape "Bastille" seems as odd as calling the F-104's trapezoidal wing planform a "Lincolnshire style" wing planform.

Many thanks in advance to anyone who can shed light on this!
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Last edited by blackshire : 09-23-2009 at 09:55 AM. Reason: This ol' hoss done forgot somethin'.
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