The article refers to sailplane DESIGNS, not actual sailplanes with
70:1 glide ratio.
Gerhard Waibel's 2002 Barnaby Lecture on "The Sailplanes Of
2020" (which he changed to 2050 so he won't be asked to prove it)
included solar powered suction control of the boundary layer, and the
likelihood of achieving 70:1 with it.
Jim


On Feb 5, 6:45*pm, Dave Nadler wrote:

Not sure where he's seeing 70:1 though...

Best Regards, Dave "YO electric"

PS: His name is Brien Seeley (not Brian)