This was designed to compete as a Standard Class glider, with a span increased to 15 m (49 ft 5½ in), and introduced a laminar flow NACA 64 series wing profile.

It is built around a single spar with a D-shaped torsion box formed by the corrugated leading section, the ridges running chordwise.

The wing is fabric covered aft of the spar, apart from an outer, metal skinned area carrying Frise ailerons.

The all moving V-tail, with 90° separation and fitted with anti-balance tabs, has similar construction and plan as the wings.

There is a fixed, partially enclosed and rubber sprung monowheel undercarriage, fitted with a brake and assisted by a small tail skid.