Well Done EvansB, I wasn't sure anyone would get this.
I think its actually the Bug 2 biplane glider, but I only deduced that from the properties on the original photo, so Goat is close enough.
Mike Sandlin has produced the Bug & Goat series of gliders, and published the drawings on the internet. Type in "Sandlin Goat Glider" on Google and you should find his website. He says he has done over 60 miles on one of them.
Here's the Bug
and here's the Goat
So EvansB over to you!
Cheers, Mechta