Rotorcraft and rotor blade
AssigneeExedy Corporation
InventorsKouzou Mori, Yasunori Kunisaki, Tatsuki Kitada, Masahiro Ohno
Life of this patent
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Abstract
The disclosed rotorcraft includes a rotor blade and a prime mover. The rotor blade extends in a radial direction. The prime mover is configured to rotate the rotor blade. The rotor blade includes a blade body and a blade end portion. The blade end portion is disposed on an outer side of the blade body in the radial direction. The blade end portion includes a leading edge (i.e., an edge facing the rotational direction) that tilts in a rotational direction to the outer side in the radial direction. The disclosed configuration reduces noise produced by the rotorcraft.
Claims14
A rotorcraft, comprising:
- a rotor blade extending in a radial direction the rotor blade having a proximal end and a distal end opposite the proximal end;
- and
- a prime mover configured to rotate the rotor blade and being configured to be connected to the proximal end,
- wherein the rotor blade includes a blade body and a blade end portion disposed at a radially outer end of the blade body, the distal end having a distal point being a point farthest from a rotational axis of the rotor blade and a distal edge extending from one side of the blade body to another side of the blade body with the distal point lying on the distal edge, and
- the blade end portion includes a leading edge facing forward in a rotational direction, a proximal end of the leading edge extending from the blade body and a distal end of the leading edge opposite the proximal end of the leading edge, the entirety of the leading edge being angled forwardly in the rotational direction with a forward sweep angle such that the distal end of the leading edge and the distal edge of the rotor blade have a shared point.
A rotor blade configured to be rotated in a rotational direction, the rotor blade comprising:
- a blade body;
- a proximal end being configured to be attached to a prime mover;
- a distal end being opposite the proximal end, the distal end having a distal point being a point farthest from a rotational axis of the rotor blade and a distal edge extending from one side of the blade body to another side of the blade body with the distal point lying on the distal edge;
- and
- a blade end portion disposed at a radially outer end of the blade body, wherein the blade end portion includes a leading edge facing forward in the rotational direction, a proximal end of the leading edge extending from the blade body and a distal end of the leading edge opposite the proximal end of the leading edge, the entirety of the leading edge being angled forwardly in the rotational direction with a forward sweep angle such that the distal end of the leading edge and the distal edge of the rotor blade have a shared point.
Dependencies are inferred from the claim text.