I have never been there, but want to guess that it's Torrey Pines in California. Just going from seeing lots of photos of the slope site going back many years. The model resembles a lot of things vintage, but not much wing span. They didn't slope soar R/C before the war! And not enough span for a good thermal ship, in my opinion. I'll guess that it is a "new" vintage design just for this purpose, hence the shorter wing span. I think it's designed to do just what you, sort of float and hover in the lighter winds.
Hey Bruce!
Many don't know that I have flown many hours of R/C sailplanes with your dad, Alden Shipp years ago. He always had a great contest in Quincy, IL, and my son Sean was featured on the local news reports of those when he was 4 or so. I remember when Alden got interested in slope, and was searching the midwest for possible sites. I remember think back then, when he told me of that Kansas site, how in the heck can you have a slope in flat as a pancake Kansas???!! Sounded like an oxymoron! Didn't your Mom and dad move there for a while or at least had a house there just to slope fly? The old memory may not be working correctly tonight. Those were fun days!
Type at you later,
Dan McEntee