[Mitchell12]

Originally Posted by Sha Do

When the BB "fins out", it will have less surface area being affected by the cross wind that is causing the BB to "fin out".
However, this surface area just does not disapear. The surface area of the "tail" or "fin" that is affected by the cross wind moves (teh BB pivots) to be in line with the cross wind, therefore the affected area of the "fin" is now being exposed to the "head wind" caused direction the BB is actually traveling..... Increasing the directional surface area and resulting in the loss of velocity.
Also as a note, the design shows two "ribs" that (I assume) are there to help stabalize the BB as it travelled down a barrel. From head on, these "ribs" would be hidden from the forward directional wind resistance because they are the same size as the BB heads OD. But these ribs will became expose to the forward resistance if a cross wind affects the "tail" causing it to "fin out" (as the BB pivots).
The effects will be minimal, but they are there.

SHA DO

Oh ok I think I see what your getting at, Though I am very interested in this project.