There were several variations on the design, some of which had no cockpit fairing at all, leaving the pilot and passenger sat out in the slipstream. Leading and trailing edges are steel cable. The rudders each consist of a single rib hinged to the fin post supporting a triangle of steel cable over which the covering is stretched. All fabric covering is doped nylon. Wings and tailplane are covered on the lower surface only.
Control is by rudder and tailplane warping.
As with the full-size aeroplane, there are neither ailerons or wing warping. Responds very well to rudders and tail warp. Needs engine power at all times as glide angle with engine at idle is almost vertical. Flat calm conditions essential due to extremely low wing loading. First flown in 1983 this model participated in few events due to its inherent limitations, but picked up some prizes.