Retractable boat keel

Details Retractable boat keel Retractable boat keel

1984-10-25

1986-01-14

Blix, Trygve M.

Ships

Centerboards

Pivoted

114141, B63B 4100

Patent

active

045639710

ABSTRACT:
A boat hull keel is disclosed which retracts into the boat hull on a fixed pivot. The pivot location is placed above the keel/hull bottom intersection, rearward of the major axis of the fully lowered keel and rearward of the keel trailing edge at the keel/hull intersection. The placement distances are large in terms of the maximum keel chord length. (measured at the keel/hull intersection.) This amounts to a novel location. The location of the pivot allows the keel rotation to create a change in the attitude of the boat hull.

REFERENCES:
patent: 327724 (1885-10-01), Schermerhorn
patent: 329088 (1885-10-01), Schermerhorn
patent: 650758 (1900-05-01), Lake
patent: 3938458 (1976-02-01), Irgens
patent: 3951090 (1976-04-01), Potter
patent: 4067280 (1978-01-01), Serfess
patent: 4376416 (1983-03-01), Carver

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