Lockheed Martin Corporation

Sikorsky Aircraft Corporation

United Technologies Corporation

Daniel Caleb Sargent

Timothy James Conti

Joseph Pantalone, Iii

Benjamin Isabella

Masruk Siddique

Brian Ernest Wake

Mark Winfield Scott

Joshua A Breon

Byung-Young Min

Eric S Parsons

William Paul Adams

Blake Almy Moffitt

Christopher Michael Colschen

A rotor blade configured to couple to a rotor assembly having an axis of rotation includes a blade radius R between the axis of rotation and an outboard end of the rotor blade when coupled to the rotor assembly. When an inboard end of the rotor blade is coupled to the rotor assembly at about x/R=0.10, between about 18 percent and about 22 percent of the total mass of the rotor blade is located between about x/R=0.88 and about x/R=0.93, x corresponding to a radial location of the rotor blade measured from the axis of rotation.

Tip end joint arrangement for a rotor blade with reconfigurable attributes for structural and aerodynamic tuning

A replacement tip section for a rotor blade, from which a legacy tip section was removed, includes a blade tip portion configured to be attached to an intermediate section of the rotor blade after removal of the legacy section. The intermediate section has a connection feature at an end of the intermediate section to which the blade tip portion is attachable. The replacement tip section includes a transition region configured to be attached to a forward end of the connection feature. The transition region is configured to form a leading edge of the rotor blade and extends from the blade tip portion to form an opening into which the intermediate section is attached. The transition region includes a first end having a first airfoil that conforms to the intermediate section airfoil at the connection feature, and a second end having a second airfoil that conforms to the blade tip portion.

Replacement tip section for a rotor blade and method of replacing a rotor blade tip section

A rotor blade for a rotary aircraft is disclosed. The rotor blade includes a body and an airflow duct extending within the body of the rotor blade. An airflow outlet of the airflow duct is located at a tip of the blade. The airflow outlet has a cross-sectional area that is equal to or greater than a cross-sectional area of the airflow duct. The rotor blade is used to mitigate brownout during flight. Air exits the rotor blade at the airflow outlet in order to disrupt a blade vortex created by rotation of the rotor blade.

Tip jet orifice for aircraft brown out mitigation

A rotor blade for a rotary wing aircraft and a tip for the rotor blade. The rotor blade includes a blade root, a blade tip and a blade body that extends from the blade root to the blade tip. The blade tip includes: a continuously swept leading edge, a compound trailing edge, and a continuous anhedral.

Rotor blade tip design for improved hover and cruise performance

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Easton, CT, United States of America

Daniel Caleb Sargent