[1] It is a cantilever mid-wing monoplane, with straight tapered wings mostly swept on the trailing edge and set with 1.5° of dihedral but no washout.

Inboard, there are slotted flaps on the trailing edges and spoilers, mounted at mid-chord and quite close to the fuselage, of the gapless kind opening upwards only.

It carries an all-metal, straight edged 90° V- or butterfly tail, its control surfaces mass-balanced with external weights.

There is a retractable monowheel undercarriage, sprung but without brakes, assisted by a rubber-mounted skid forward of the wheel and a tail bumper aft, formed by a short, shallow ventral fin[2]: 34–6 [3] The A-11 first flew on 12 May 1958.

[2]: 38-9 Information from Ogden[4] Data from The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde Volume II[2]: 342–3 General characteristics Performance