Position detector
Number of patents in Portfolio can not be more than 2000
United States of America
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-
Oct 17, 1989
Grant Date -
N/A
app pub date -
May 16, 1988
filing date -
Nov 10, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A detector for checking the symmetry of a helicopter rotor while it is rotating has a scanner (11) which scans vertically a field of view (15) and the view is interrupted by a vertical strip on the blade tip (16). A slot (18) in the strip gives a characteristic signal as at (L.sub.2). The position of the signal (L.sub.2) in a scanning cycle gives an indication of the height of the blade tip and also the circumferential spacing between blades.
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