Air flow indicator for sailboat sails

Details Air flow indicator for sailboat sails Air flow indicator for sailboat sails

1994-09-09

1995-05-16

Swinehart, Edwin L.

Ships

Sail or control means therefor

Specific sail structure or arrangement

114 39001, B63H 904

Patent

active

054151210

ABSTRACT:
An air flow indicator for a sailboat sail has a lever passing through a small hole in the surface of the sail. Flexible tails are affixed to opposite ends of the lever on opposite sides of the sail. The lever is so configured as to remain centered with respect to the sail. Unequal air flow on opposite sides of the sail cause unequal forces on the flexible tails causing the lever to pivot with respect to the sail. The pivoting of the lever with respect to the sail is observable while viewing only one side of the sail which allows the viewer to determine the air flow conditions on both sides of a sailboat sail while viewing only one side.

REFERENCES:
patent: 3789793 (1974-02-01), Keim
patent: 3815412 (1974-06-01), Keim
patent: 4223631 (1980-09-01), Pood

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