Here's one for the folk who've been talking physics this week:
Does a straight bar bike have an advantage over a drop bar bike in a tailwind?
No. Because its unlikely that the tailwind exceeds the frontal drag
There's a bit about tailwinds in this article.
It basically says there's no advantage to being sat upright unless the wind is going faster than you are.
If you insist......whikeno, but a bike with a sail will....