Abstract: A fiber-reinforced plastic article of manufacture having a multi-chambered, cellular structure with an outer shell and an inner shell for use as part of a fluid foil structure, said inner shell extending between at least two generally opposite interior walls of said outer shell and being coupled thereto, thereby defining at least two chambers within said article, the wall of each of said shells being composed of a plastic having embedded therein at least one layer of continuous roving of a fibrous reinforcement material, said at least one layer in each of said shells being continuous and unbroken around each of said shells.

Abstract: A fiber-reinforced plastic article of manufacture having a multi-chambered, cellular structure with an outer shell having a fluid foil shape with a leading edge having a smooth radius of curvature and a trailing edge [noncircular]cross section over a substantial portion of its length and containing therein an inner shell which extends between at least two opposite interior walls of said outer shell thereby defining at least two chambers within said article, the walls of said shells being composed of a plastic having embedded therein at least on layer of a continuous roving of a fibrous reinforcement material, said at least one layer comprising two adjacent thicknesses of said roving with the rovings being in parallel alignment in each thickness and the rovings being in parallel alignment in each thickness and in diagonal orientation between thicknesses and with the rovings in the outer shell being continuous and unbroken over the leading edge of said foil shape.