The Nucleon designed by Art Schultz, which first flew in 1954, has a wing bult of Styrofoam around a spar and convered with a fiberglass shell. To save weight, struts were used with cuffs at both ends. It has full span flaps, with drooping ailerons, and a horizontal tail which folds up for trailing.
The structure was I-strut braced all-wood wings, steel-tube/ fabric wings and braced tail.
Wing span: 14 m / 46 ft
Wing area: 12.17 sq.m / 131 sq.ft
Aspect ratio: 16
Airfoil: NACA 65 (2)-415
Empty Weight: 156 kg / 345 lb
Payload: 86 kg / 190 lb
Gross Weight: 242 kg / 535 lb
Wing Load: 19.88 kg/sq.m / 4.1 lb/sq.ft
L/DMax: 22 76 kph / 41 kt / 47 mph
MinSink: 1.00 m/s / 3.3 fps / 1.96 kt