Geometrical instruments – Straightedge type – Plural straightedges – relatively moveable
Patent
1979-12-12
1981-06-02
Phillips, Charles E.
Geometrical instruments
Straightedge type
Plural straightedges, relatively moveable
33453, 33463, B43L 706
Patent
active
042702780
ABSTRACT:
The disclosure teaches a device for creating an infinite number of vector triangles such that a vehicle's speed may be set as one leg of a vector triangle and the apparent wind's speed and direction may be set as a second leg, solution of the third leg yielding true wind speed and relative wind direction which is convertible into true wind direction by reference to vehicle true heading.
REFERENCES:
patent: 1117805 (1914-11-01), De L'eau
patent: 2210939 (1940-08-01), Garrett
patent: 2300347 (1942-10-01), Dalton
patent: 3863347 (1975-02-01), Banner
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