On Thursday, December 15, 2016 at 10:12:12 PM UTC-5, Jonathan St. Cloud wrote:
Not being an aerodynamicist, I was wondering if winglets decreased ground effect. So would an ASW-20 (without winglets) be able to glide further in ground effect than an ASW-20 (with winglets), all else being equal?

I googled it and this website answers the question https://www.quora.com/Do-aircrafts-w...-ground-effect . Not about the ASW-20 specifically.

It is on the internet, and therefore, must be true.