Abstract
An aerofoil including an oval spar composed of continuous intersecting oppositely pitched geodetic bracing members extending unbrokenly in both directions for more than one complete pitch turn, said geodetic members being passed at their intersections by halving each member oppositely, said geodetic members formed with holes aligned from end to end of the spar and a longitudinal stiffening member extending through said holes from end to end of said spar and rigidly connected to the said bracing members where it passes through said holes, and a nose forming fairing secured at one edge and a trailing edge forming fairing secured to the opposite edge of said spar, said fairings merging into the sides of said spar, and together therewith forming an aerofoil section.
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