Two seat monoplane flying boat with 'hydropeds' used for takeoff and containing
three sets of hydrofoils, each consisting of a central leg bearing a stack of lifting planes. In addition to the air propeller
the aircraft was to be driven by water propellers mounted at the lower ends of the two forward hydropeds for use at take-off,
driven via a clutch so they could be disengaged when the aircraft was in flight. One 80 h.p. Canton-Unne powerplant.
Two seat monoplane flying boat similar to, but larger than X.2 in both span and wing area. The hull framework
was made at Filton and sent to Cowes for Saunders to cover it with their Consuta sewn plywood. One 200 h.p. Canton-Unne
adaptation of a Bristol G.E.1 biplane with 'hydropeds'. Rejected in favour of a new design.