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Btdt, in wave lift you're on the forward face so it's smooth as silk. The backside is a literal downer. But it's pretty much aligned with permutations or mountains that block the high speed winds it requires. AND it is a transient thing. Some days you can't easily get down, most days you aren't going up. Works lousy for regularly schedules services.
Your NASA2415. This is zero lift at -2 degrees relative, but it isn't at 0 drag. Whilst your studying look at the CD value chart for AOA. BTW a 64 series 45% laminar would be a better choice if you can accept the thinness and can generate the proper leading edge radius. It will also require a prone driver.
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