 The aircraft was to be supported in the water by five streamlined airbags under the wings but for takeoff used the hydrofoil principle recently pioneered by Enrico Forlanini using three sets of hydrofoils, each consisting of a central leg bearing a stack of lifting planes, an assembly referred to as a "hydroped".In addition to the air propeller the aircraft was to be driven by water propellers for use at take-off, driven via a clutch so they could be disengaged when the aircraft was in flight.This proposal was soon discarded, and Barnwell produced a proposal for a two-seat monoplane with an inflatable wing, using eight tubes of rubberised fabric running spanwise in place of spars.