An elongate foil, selected from a hydrofoil and an aerofoil, comprising a body comprised of laminated plies of fibre-reinforced resin matrix composite material, wherein the body has a central internal surface 60 extending between opposite longitudinal ends of the foil, curved along its length, and first and second side parts defining respective opposite foil surfaces are bonded together. Each side part comprises a laminated stack of plies 50 of fibrous reinforcement, whereby each foil surface has double curved contour profiles, along length and transverse thereto, being formed by varying the number of plies of fibrous reinforcement at positions along the respective contour profile. A method of manufacturing an elongate foil comprises providing an elongate moulding tool, curved along its length; sequentially positioning preform layers to build up a first shaped side part 156 having first and second contour profiles formed by varying the number of preforms layers at positions; curing and removing the first part from the mould surface and sequentially positioning preform layers on an inner surface of the first part to form the second shaped body 84, curing to form a elongate unitary body.


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    Title :

    Manufacture of fibre-reinforced composite hydrofoils and aerofoils


    Contributors:

    Publication date :

    2024-01-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B29C Formen oder Verbinden von Kunststoffen , SHAPING OR JOINING OF PLASTICS / B29D PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE , Herstellen besonderer Gegenstände aus Kunststoff oder aus Stoffen in plastischem Zustand / B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS



    Hydrofoils

    Hook, Christopher / Kermode, Alfred Cotterill | TIBKAT | 1967


    Aerofoils

    Sinnatt, O.T. | Engineering Index Backfile | 1926


    Stalling aerofoils

    Jones, M. | Engineering Index Backfile | 1934


    Machining aerofoils

    Pearson, H.J. | Engineering Index Backfile | 1958


    Machining aerofoils

    Pearson, H.J. | Engineering Index Backfile | 1958