Sailing craft keel and rudder flow modifiers

Details Sailing craft keel and rudder flow modifiers Sailing craft keel and rudder flow modifiers

1987-03-19

1989-05-02

Basinger, Sherman D.

Ships

Keels

114 67R, 114162, B63B 338

Patent

active

048257958

ABSTRACT:
Arrays of parallel, substantially fore and aft oriented vortex generators are positioned on the keel and rudder of a sailboat to induce vortices at the surfaces of the keel and rudder for the purpose of reenergizing the boundary layers in the water flow past the keel and the rudder to increase the lateral lift in the horizontal plane and to thereby avoid increase in drag associated with keel and rudder stall at high angles of attack with the relative water flow. Similar arrays for the same purpose may be attached to other underwater stabilizing members such as skegs, keel winglets, centerboards, etc.

REFERENCES:
patent: 1639675 (1927-08-01), Snadecki
patent: 1795346 (1931-03-01), Rebl
patent: 1799538 (1931-04-01), Scholz
patent: 2099229 (1937-11-01), Possenheim
patent: 2800291 (1957-07-01), Stephens
patent: 2899150 (1959-08-01), Ellis
patent: 4599964 (1986-07-01), Kenney et al.
patent: 4606291 (1986-08-01), Hoppe
patent: 4631036 (1986-12-01), Grothues-Spork
patent: 4706910 (1987-11-01), Walsh et al.
Bryan Thwaites, (Oxford at the Clarendon Press), Incompressible Aerodynamics, 1960, pp. 198-217.

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