Sails or not....
Phil: Thanks for your reply.
Summarizing: The test data and your fluidynamic description imply that side "sails" are NOT required to achieve the drag reduction with the "wing" and the 1/2 cover.
Kach22: I have not come across a PDF of the paper on the web. AIAA will sell you a copy, but that also probably means it's copy-right protected and shouldn't be posted to the web.
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