Helicopter
AssigneeSubaru Corporation
InventorsMizuki Nakamura, Shuzou Hakuta, Hirotoshi Tsukamoto, Masafumi Sasaki, Ryusuke Sakamoto, Takumi Shinotsuka, Mitsunori Fukudome, Hiroshi Nagai, Hiroshi Taguchi, Toshihiro Yokoyama
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Abstract
A vertical tail of a helicopter has a leading edge and a trailing edge concave toward the leading edge. The helicopter includes a main rotor and a tail rotor for generating anti-torque to cancel torque generated by rotation of the main rotor. The trailing edge is concave within a range within which the vertical tail overlaps a circular region, formed as a rotation range of the tail rotor, in a rotation axis direction of the tail rotor.
Claims20
A vertical tail of a helicopter, the helicopter including a main rotor and a tail rotor for generating anti-torque to cancel torque generated by rotation of the main rotor, the vertical tail comprising:
- a leading edge;
- and
- a trailing edge concave toward the leading edge,
- wherein the trailing edge is concave only within a range within which the vertical tail overlaps a circular region in a rotation axis direction of the tail rotor,
- wherein the circular region is formed as a rotation range of the tail rotor, and
- wherein the concave trailing edge is positioned to avoid interference with main reinforcing members, including spars, of the vertical tail to maintain mechanical strength of the vertical tail for supporting the tail rotor.
A vertical tail of a helicopter, the helicopter including a main rotor and a tail rotor for generating anti-torque to cancel torque generated by rotation of the main rotor, the vertical tail comprising:
- a leading edge;
- a trailing edge concave toward the leading edge;
- and
- spoilers attached to a left side and a right side of the vertical tail respectively, the spoilers suppressing generation of vortices around the concave trailing edge by separating airflow on left and right surfaces of the vertical tail respectively,
- wherein the concave trailing edge has a cover made of a flat plate, the flat plate being disposed not so as to protrude from the concave trailing edge, the flat plate being attached to inner surfaces of skins on left and right sides of the vertical tail with shape materials, and the flat plate being positioned to avoid interference with a spar on the trailing edge side of the vertical tail.
A vertical tail of a helicopter, the helicopter including a main rotor and a tail rotor for generating anti-torque to cancel torque generated by rotation of the main rotor, the vertical tail comprising:
- a leading edge;
- and
- a trailing edge concave toward the leading edge,
- wherein the trailing edge is concave only within a range within which the vertical tail overlaps a circular region in a rotation axis direction of the tail rotor,
- wherein the circular region is formed as a rotation range of the tail rotor,
- further including spoilers attached to a left side and a right side of the vertical tail respectively, the spoilers suppressing generation of vortices around the concave trailing edge by separating airflow on left and right surfaces of the vertical tail respectively,
- wherein the spoilers include upright plates that stand out from the left and right surfaces of the vertical tail respectively.
A vertical tail of a helicopter, the helicopter including a main rotor and a tail rotor for generating anti-torque to cancel torque generated by rotation of the main rotor, the vertical tail comprising:
- a leading edge;
- and
- a trailing edge concave toward the leading edge,
- wherein the trailing edge is concave only within a range within which the vertical tail overlaps a circular region in a rotation axis direction of the tail rotor,
- wherein the circular region is formed as a rotation range of the tail rotor,
- wherein the concave trailing edge has a cover made of a flat plate, the flat plate being disposed not so as to protrude from the concave trailing edge,
- wherein the flat plate has beads concave toward the leading edge, each length direction of the beads being a thickness direction of the vertical tail,
- wherein each length of the beads is shorter than a length of the flat plate in a width direction.
Dependencies are inferred from the claim text.