초록 ▼

A rotor blade has a neck section which connects the blade proper to a rotor head at the blade root. The neck section is flexible against bending in the lead-lag direction and in the flapping direction. A carrier member is located alongside or inside the neck section but spaced from the neck section.

A rotor blade has a neck section which connects the blade proper to a rotor head at the blade root. The neck section is flexible against bending in the lead-lag direction and in the flapping direction. A carrier member is located alongside or inside the neck section but spaced from the neck section. The carrier member is resistant against bending at least in the lead-lag direction or in the flapping direction. The carrier member is rigidly connected at its one end to the blade proper. A layer of a damping material is operatively interposed between the carrier member and the neck section, preferably at the blade root end of the neck section, whereby blade vibrations preferably in the lead-lag direction are damped and substantially prevented from entering into the rotor head.

대표청구항 ▼

A hingeless rotor blade, especially for rotary wing aircraft, comprising blade means, a blade root and a blade neck section (2 or 5) operatively connecting said blade means and said blade root, said blade neck section (2 or 5) being flexible relative to bending loads in the lead-lag direction and in

A hingeless rotor blade, especially for rotary wing aircraft, comprising blade means, a blade root and a blade neck section (2 or 5) operatively connecting said blade means and said blade root, said blade neck section (2 or 5) being flexible relative to bending loads in the lead-lag direction and in the flapping direction, carrier means (3 or 6) resistant against bending in at least one direction, means rigidly connecting said carrier means (2 or 6) to said blade means, and damping means (4 or 8) directly and operatively interposed between said blade neck section (2 or 5) and said carrier means (3 or 6), whereby said carrier means are operatively connected in parallel to said blade neck section and operate as lever means when the blade neck section is subject to a bending load for transmitting a force into said damping means in accordance with the mechanical advantage of said lever means for substantially damping blade vibrations in accordance with said mechanical advantage and in said at least one direction.