On Wednesday, April 3, 2019 at 1:53:19 AM UTC-5, krasw wrote:
ASW 20 was ahead of it's time and in reality belongs to same generation as Ventus/LS6 (except that final bit of wing loading). ... All Wortmann FX170-profiled gliders are older generation performance-wise. If it rains or you get bugs on leading edge, you fall out of sky like an anvil.

But, the 20 uses the older (and maybe better?) 62K153/131 family. Maybe that is why it was ahead of its time? Because it used an older airfoil section. Like its big brothers, the ASW 12 and ASW 17.

Steve Leonard