Helicopter rotor blade with improved performance characteristics
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United States of America Patent
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Sep 21, 1993
Grant Date -
N/A
app pub date -
Jun 9, 1992
filing date -
Jun 14, 1991
priority date (Note) -
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Abstract
In a helicopter rotor blade having a root end for attachment to a rotor head, a central portion of constant chord dimension and a tip portion having a chord dimension greater than that of the central portion, an outboard region of the central portion has a negative basic pitching moment coefficient, an inboard region of the central portion has a basic pitching moment coefficient more positive than that of the outboard region and the tip portion has a positive basic pitching moment coefficient.
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