Rigging and flying a Primary Glider at Camphill in the 1930s. Constructed of wood, metal cables and cloth, these aircraft were inexpensive, very light and easy to fly. Primary gliders were generally launched by bungee cord, whereby a rubber rope was arranged in a "V" with the glider at the apex. The ends of the rope were pulled by hand to launch the glider from a slope as is demontrated in the film.