Ships – Hull or hull adjunct employing fluid dynamic forces to... – Having hydrofoil
Patent
1980-07-31
1982-08-24
Blix, Trygve M.
Ships
Hull or hull adjunct employing fluid dynamic forces to...
Having hydrofoil
114280, 244215, B63B 124, B63B 126
Patent
active
043455387
ABSTRACT:
A combined, liner retainer and seal for use with hydrofoils in which fluid foils have trailing control flaps, keyed together. The control flaps are hingedly engaged to the trailing end of the foils and are rotated on the hinge for control purposes. The flaps are segmented to form a series and in each pair a key extends from a driving flap into a keyway in a driven flap so that the flaps are rotatable together. There is an elastic liner within the keyways and into which the key fits, the liner serving to protect the metallic surfaces of the keys and keyways. The combined seal and retainer extends between the flaps from the trailing end of the foil to the trailing edge of the flaps and has openings through which a hinge pin and the key extends. The retainer is elastic and holds the liner within the keyway so as to prevent its dislodgment and destruction. Spaces between the flaps permit pressure blend therethrough and because there are a considerable number of driver to driven flap interfaces, the negative effects of resulting cavitation flow are cumulative. The seal substantially inhibits the pressure bleed between the flaps so as to greatly reduce cavitating and/or separating flow. In another embodiment the retainer/seal and liner are combined into one part.
REFERENCES:
patent: 2329133 (1943-09-01), Peed
patent: 3070392 (1962-12-01), Potter
patent: 3968946 (1976-07-01), Cole
patent: 4213587 (1980-07-01), Roeseler
Feifel Winfried M.
Warner Gary J.
Barnard Delbert J.
Blix Trygve M.
Heberer Eugene O.
Keen D. W.
Pauly Joan H.
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