Adjusting the static moment of a rotor blade

Details Adjusting the static moment of a rotor blade Adjusting the static moment of a rotor blade

1976-06-08

1978-03-14

Gill, James J.

Measuring and testing

Center of gravity; turning moment; metacentric height

73456, 416 61, G01M 112, G01M 132

Patent

active

040784223

ABSTRACT:
In finishing the construction of a rotary wing, particularly helicopter rotor blade, the blade is weighed to determine the position of its static moment. The measured value is compared with a predetermined value and, if necessary, the static moment is adjusted by applying a high specific gravity filler material to the surface of the blade. The filler material has a specific gravity in a range of 6 to 10 p/cm.sup.3 and can be formed of a mixture of tungsten powder and epoxy resin. The weighing operation is performed on a three scale apparatus with one scale supporting the end of the blade attached to the rotor and the other two scales supporting the opposite end of the blade.

REFERENCES:
patent: 1209730 (1916-12-01), Leblanc
patent: 1385802 (1921-07-01), St. John
patent: 2203782 (1940-06-01), Hem
patent: 2430702 (1947-11-01), Bohannan
patent: 2937613 (1960-05-01), Larsh
patent: 3939020 (1976-02-01), Carmanian et al.

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