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Primary Examiner: Gruber, Felix D.
Assistant Examiner:
Attorney: Wilson; David H.

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Title: Apparent wind direction indicator

Abstract: A system for evaluating the performance of a sailing boat wherein average boat speed, average apparent wind speed and average apparent wind direction are sensed and are utilized to determine the performance characteristics of sailing boats. The system includes an apparent wind direction indicator which senses the instantaneous apparent wind direction and compares it with a previously generated average apparent wind direction signal to obtain an error signal. The error signal is intergrated to obtain an average error signal which is utilized to correct the previously generated average apparent wind direction signal by changing the position of an average apparent wind direction indicator.

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Other info:

Inventors: Taylor, Lucian W. (Los Altos, CA, US)
Eilers, George J. (Redwood City, CA, US)

Application Number: 499253
Filing Date: 1974-08-21
Publication_date: 1976-01-20
Assignee: Velcon Filters, Inc. (San Jose, CA)
Primary Class(es): 702/150 73/170.03, 702/153, 702/199
Other Classes:
US Patent Ref:

2414919	Jan, 1947	Alexanderson	318/655.
2415080	Feb, 1947	Bonell	318/655.
2970302	Jan, 1961	Gridley	340/198.
3323130	May, 1967	Bailey	73/188.
3552206	Jan, 1971	Laute, Jr.	73/188.
3665759	May, 1972	Daley	73/188.
3727457	Apr, 1973	Gregory	73/188.

Other Refs: Other References: Howbrook: A New Synchro. Conference on Servocomponents, Nov. 21-23, 1967, IEE Control and Automation Division, London, pp. 7-12.