 The use of a multi-ducted belly scoop and clear, low profile perspex canopy, along with a reputed 20 coats of hand-rubbed lacquer also contributed to the sleek aerodynamic finish.Saunders-Roe provided wing spars made of "Compregnated wood", a system that involved multiple laminations bonded with resin under high pressure.Diminutive, thin-sectioned symmetrical wing airfoils were designed for high-speed flight.