Spencer Compact 110
Bill Spencer designed and built a low cost glider aimed at the "lazy day soaring" crowd. It was interesting enough to be reviewed twice in Kitplanes magazine.
The fuselage weighs only 29 pounds total. It is built of pop-riveted aluminum tubes and a plywood seat.
The Compact 110 is designed for foot launching from a gentle slope into a steady wind. Essentially, the pilot stands in the cockpit, picks it up, and runs down the slope into the wind until the seat picks the pilot up.