In the early days, Flexifoil inventors Ray Merry and Andrew Jones, spent many hours testing and talking about their strange wind inflated wings. The "Limpet", as seen in the photograph, was a temporary Vinyl sheeting tent/shelter, where equipment was stowed during test sessions. These early experimental flights were carried out in the North of England in the early '70's where the weather was often damp and cold. The "Limpet" also provided a welcome wind break.

The early test wings were constructed of Polyethylene with a selection of leading edge spar materials. Bamboo being a favorite until the duo found fiberglass. Due to ultra-violet damage, the maximum flying life of the mainly clear "kites" was only 2 or 3 hours!