Aircraft stabilization systems and methods of modifying an aircraft with the same
First Claim
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1. A method for modifying a helicopter, comprising:
- physically coupling a tail boom modification structure to at least an exiting side of a tail boom fuselage that is opposite an approaching side of the tail boom fuselage, the tail boom modification structure having a first convex exterior surface that extends from a vertical apex of the tail boom modification structure to a vertical nadir of the tail boom modification structure, a first concave exterior surface that extends from the vertical apex to a transition point and is shaped to fittingly receive an exiting side of a tail rotor drive shaft cover that is opposite an approaching side of the tail rotor drive shaft cover, a second concave exterior surface that extends from the transition point to the vertical nadir of the tail boom modification structure and is shaped to fittingly receive at least a portion of the exiting side of the tail boom fuselage, and a plurality of vortex generators physically coupled to the first convex exterior surface.
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Abstract
A method of modifying a helicopter includes providing a tail boom of the helicopter. The tail boom includes a first side located on an opposite side of the tail boom from a second side of the tail boom. A main rotor blade of the helicopter approaches the second side of the tail boom during rotation. The first side and the second side of the tail boom include asymmetrical surface profiles about a vertical plane of the tail boom. The method further includes securing a plurality of vortex generators to the first side of the tail boom.
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Citations
30 Claims
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1. A method for modifying a helicopter, comprising:
physically coupling a tail boom modification structure to at least an exiting side of a tail boom fuselage that is opposite an approaching side of the tail boom fuselage, the tail boom modification structure having a first convex exterior surface that extends from a vertical apex of the tail boom modification structure to a vertical nadir of the tail boom modification structure, a first concave exterior surface that extends from the vertical apex to a transition point and is shaped to fittingly receive an exiting side of a tail rotor drive shaft cover that is opposite an approaching side of the tail rotor drive shaft cover, a second concave exterior surface that extends from the transition point to the vertical nadir of the tail boom modification structure and is shaped to fittingly receive at least a portion of the exiting side of the tail boom fuselage, and a plurality of vortex generators physically coupled to the first convex exterior surface. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A tail boom modification structure, comprising:
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a first convex exterior surface that extends from a vertical apex of the tail boom modification structure to a vertical nadir of the tail boom modification structure; a first concave exterior surface that extends from the vertical apex to a transition point and is shaped to fittingly receive an exiting side of a tail rotor drive shaft cover, the exiting side of the tail rotor drive shaft cover opposite an approaching side of the tail rotor drive shaft cover; a second concave exterior surface that extends from the transition point to the vertical nadir of the tail boom modification structure and is shaped to fittingly receive at least a portion of an exiting side of a tail boom fuselage, the exiting side of the tail boom fuselage opposite an approaching side of the tail boom fuselage; and a plurality of vortex generators physically coupled to the first convex exterior surface. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A helicopter tail boom, comprising:
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a tail boom fuselage that has an approaching side and an exiting side opposite the approaching side, the tail boom fuselage symmetrical about a vertical plane; a tail rotor drive shaft cover that has an approaching side and an exiting side opposite the approaching side, the tail rotor drive shaft cover symmetrical about the vertical plane; and a tail boom profile modification structure, comprising; a first convex exterior surface that extends from a vertical apex of the tail boom modification structure to a vertical nadir of the tail boom modification structure; a first concave exterior surface that extends from the vertical apex to a transition point between the tail rotor drive shaft cover and the tail boom fuselage and is shaped to fittingly receive the exiting side of a tail rotor drive shaft cover; and a second concave exterior surface that extends from the transition point between the tail rotor drive shaft cover and the tail boom fuselage to the vertical nadir of the tail boom modification structure and is shaped to fittingly receive at least a portion of the exiting side of a tail boom fuselage; wherein the tail boom fuselage, the tail rotor drive shaft cover, and the tail boom profile modification structure collectively form a modified external profile that is asymmetrical about the vertical plane. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification