U.S. Patent Specifications

Abstract

An air braking system for an aeroplane comprising a coned fairing extending rearwardly from a trailing edge of said aeroplane, said fairing rearwardly terminating in a truncation area of substantially circular cross section, a shaft extending rearwardly from the centre of said truncation area, a coned tip on the end of said shaft having a basal forwardly facing area of substantially circular cross section greater in diameter than that of said shaft and less than that of the truncation area of said fairing, a hub mounted to rotate freely on said shaft adjacent the truncation area of said fairing, a plurality of propeller blades mounted on said hub, said blades being foldable rearwardly outside of said shaft with the tips of said blades adjacent the basal area of said tip to form with said hub a generally coned streamline contour between said fairing and said tip, and means for moving said blades outwardly from said folded position to a position intersecting the airstream over said fairing for free rotation thereby.

Citation

(1954), "U.S. Patent Specifications", Aircraft Engineering and Aerospace Technology, Vol. 26 No. 9, pp. 320-320. https://doi.org/10.1108/eb032479