Measuring and testing – Navigation – Take-off and landing monitors
Patent
1978-10-20
1980-12-02
Yasich, Daniel M.
Measuring and testing
Navigation
Take-off and landing monitors
33 1C, 114102, 114114C, 116300, 116DIG43, G01C 2100
Patent
active
042364094
ABSTRACT:
An indicator for indicating the optimum angular position of a sail which is adapted to be rotated in various positions relative to a wind, and wherein the position of the sail may be represented by a polar curve comprising a laminar zone, a drop-off zone, a transition zone and a checking zone. The indicator comprises display means for displaying the optimum angular position of the sail relative to the wind as well as evaluation means for determining the position of the sail which corresponds to value between the end of the laminar zone and the beginning of the checking zone as a function of the direction of the wind. Means for indicating the direction of the wind to the evaluation means and driving means for driving the display means to display the optimum sail position are also included.
REFERENCES:
patent: 3478585 (1969-11-01), Scannel
patent: 3665759 (1972-03-01), Daley
patent: 4022150 (1977-05-01), Greene
patent: 4027533 (1977-06-01), Pretto
Publ. "Sailing Theory and Practice" CA Marchaj. C 1964 pp. 69-76, 121-126.
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