Yoke with notched arm roots
A yoke for a rotary wing aircraft rotor system has a plurality of arms, each arm having a root. Each root has a notched portion configured to allow passage of a portion of a blade-pitch control system through the notched portion.
1. A yoke for a rotary-wing aircraft, the yoke comprising:
a plurality of arms extending from a central portion, each arm having a root; and
a notch formed in a leading edge or a trailing edge of each root and adapted to allow positioning of a portion of a blade-pitch control system within each notch.
2. The yoke according to claim 1 , wherein the yoke is formed from a composite material.
3. The yoke according to claim 1 , wherein each notch comprises a notch envelope defined by an imaginary continuation of the corresponding edge toward the central portion.
4. The yoke according to claim 1 , wherein the yoke has four arms.
5. A rotor system for a rotary-wing aircraft, the rotor system comprising:
a yoke having a plurality of arms extending from a central portion, each arm having a root;
a blade-pitch control system; and
a notch formed in a leading edge or a trailing edge of each root and configured to allow positioning of a portion of the blade-pitch control system within each notch.
6. The rotor system according to claim 5 , wherein the yoke is formed from a composite material.
7. The rotor system according to claim 5 , wherein each notch comprises a notch envelope defined by an imaginary continuation of the corresponding edge toward the central portion.
8. The rotor system according to claim 5 , wherein the yoke has four arms.
9. A rotary-wing aircraft, comprising:
at least one rotor system having a yoke with arms extending from a central portion, each arm having a notch in an arm root and a blade rotatably attached to the arm for allowing adjustable pitch of each blade; and
a blade-pitch control system;
wherein a portion of the blade-pitch control system is positioned within each notch.
10. The aircraft according to claim 9 , wherein the yoke is formed from a composite material.
11. The aircraft according to claim 9 , wherein each notch comprises a notch envelope defined by an imaginary continuation of a corresponding leading edge or trailing edge toward the central portion.
12. The aircraft according to claim 9 , wherein the yoke has four arms.