[1] The two Oškinis designs were simple, open frame fuselage primary gliders in the SG 38 Schulgleiter tradition.
One of LAK's founding goals was to develop the aeronautical use of plastics and composites, so the forward fuselage of the Strazdas, apart from a wooden nose fairing which held the launch towing hook, was built from three-ply glass fibre with foam filling.
The pilot sat in a long, open cockpit with the seat back against a pedestal that supported the wing.
This pedestal was part of the enclosed, round-sectioned rear fuselage structure which also included an integral fin.
The first production aircraft had wooden spars but this was later replaced by integrated glass fibre reinforced polyester resin structures.