Hydrodynamic stabilizing device

Details Hydrodynamic stabilizing device Hydrodynamic stabilizing device

1976-03-11

1977-01-25

Blix, Trygve M.

B63B 2152

Patent

active

040043088

ABSTRACT:
A stabilizing structure for a buoyant elongated cylindrical housing assembly is tethered to an anchor on the bottom of a body of water and includes a pair of positively buoyant arms hinged to the top of the housing at an angle to each other with leaf spring members and cables attached to the ends of the leaf spring members to limit the upward travel. The outwardly extending arms have an airfoil-like cross section and assume a trailing position relative to any current in the water with the current bisecting the angle between the arms. This arrangement causes the arms to exert a lifting force tending to both rotate the housing toward the vertical around its point of attachment with the tethering line attached to its lower end in opposition to the tilting force exerted by the current and also to positively lift the housing to a higher position more nearly over the anchor. A pair of tip fins may be used to counter forces tending to move the assembly in yaw. A pair of short strips may be attached along the sides of the housing to minimize vortex shedding effects.

REFERENCES:
patent: 3453670 (1969-07-01), Conry
patent: 3500209 (1970-03-01), Fletcher et al.
patent: 3953905 (1976-05-01), Paitson

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