The LIBIS-17, originally known as the LIBIS KB-17, was designed to provide tandem seat training in advanced gliding flight, including aerobatics and cloud flying, as well as solo experience to gold and silver C standard as a single seater.
The leading edge was a plywood torsion box, supported by Styrofoam, and the rest of the wing was fabric covered.
Both vertical and horizontal rear stabilizers were all-moving, single piece surfaces, fitted with servo tabs.
A transparency in the wing leading edge assisted the upwards visibility from the rear seat.
[1] There is photographic evidence of a motorised version, with an engine and propeller on a mast above the wing.