Compliant Tail Structure for Rotorcraft

    公开(公告)号:US20220227478A1

    公开(公告)日:2022-07-21

    申请号:US17714967

    申请日:2022-04-06

    Abstract: A compliant tail structure for a rotorcraft having rotating components and a fuselage. The tail structure includes a tail assembly having first and second oppositely disposed tail members. A tail joint connects the tail assembly to an aft portion of the fuselage. The tail joint includes at least four tail mounts configured to establish a nodding axis for the tail assembly. At least two of the tail mounts are resilient tail mounts that are configured to establish a nodding degree of freedom for the tail assembly relative to the fuselage about the nodding axis, thereby detuning dynamic fuselage responses from excitation frequencies generated by the rotating components.

    Downstop load sensing system
    2.
    发明授权

    公开(公告)号:US11840330B2

    公开(公告)日:2023-12-12

    申请号:US17183510

    申请日:2021-02-24

    CPC classification number: B64C29/0033 B64C19/00

    Abstract: Embodiments are directed to a tiltrotor aircraft having a wing, a proprotor pivotably mounted on the wing, and a downstop striker attached to the proprotor using a load pin, wherein the load pin is configured to generate an output signal representing a force between the proprotor and the wing. A downstop mounted on the wing is aligned to be in contact with the downstop striker when the proprotor is in a horizontal position. A conversion actuator moves the proprotor between a horizontal position and vertical position. A flight control computer is coupled to the output signal from the load pin and configured to control the conversion actuator, wherein the flight control computer is configured to cause the conversion actuator to increase the force if the force is less than a first selected preload value or to decrease the force if the force is greater than a second selected preload value.

    Compliant tail structure for rotorcraft

    公开(公告)号:US11603183B2

    公开(公告)日:2023-03-14

    申请号:US17714967

    申请日:2022-04-06

    Abstract: A compliant tail structure for a rotorcraft having rotating components and a fuselage. The tail structure includes a tail assembly having first and second oppositely disposed tail members. A tail joint connects the tail assembly to an aft portion of the fuselage. The tail joint includes at least four tail mounts configured to establish a nodding axis for the tail assembly. At least two of the tail mounts are resilient tail mounts that are configured to establish a nodding degree of freedom for the tail assembly relative to the fuselage about the nodding axis, thereby detuning dynamic fuselage responses from excitation frequencies generated by the rotating components.

    Compliant tail structure for rotorcraft

    公开(公告)号:US11319055B2

    公开(公告)日:2022-05-03

    申请号:US16558071

    申请日:2019-08-31

    Abstract: A compliant tail structure for a rotorcraft having rotating components and a fuselage. The tail structure includes a tail assembly having first and second oppositely disposed tail members. A tail joint connects the tail assembly to an aft portion of the fuselage. The tail joint includes at least four tail mounts configured to establish a nodding axis for the tail assembly. At least two of the tail mounts are resilient tail mounts that are configured to establish a nodding degree of freedom for the tail assembly relative to the fuselage about the nodding axis, thereby detuning dynamic fuselage responses from excitation frequencies generated by the rotating components.

    Adhesive joints for aircraft
    8.
    发明授权

    公开(公告)号:US10597134B2

    公开(公告)日:2020-03-24

    申请号:US15437198

    申请日:2017-02-20

    Abstract: An adhesive joint for an aircraft includes a first aircraft component having a first surface forming one or more isolation grooves, a second aircraft component having a second surface and an adhesive forming a bondline between the first and second surfaces to bond the first aircraft component to the second aircraft component. The adhesive substantially fills the one or more isolation grooves to form at least one disbond arrest boundary. The at least one disbond arrest boundary is operable to prevent a disbond in the bondline from traversing therethrough, thereby preventing the disbond from propagating along the bondline across the at least one disbond arrest boundary.

    DOWNSTOP LOAD SENSING SYSTEM
    9.
    发明申请

    公开(公告)号:US20220266997A1

    公开(公告)日:2022-08-25

    申请号:US17183510

    申请日:2021-02-24

    Abstract: Embodiments are directed to a tiltrotor aircraft having a wing, a proprotor pivotably mounted on the wing, and a downstop striker attached to the proprotor using a load pin, wherein the load pin is configured to generate an output signal representing a force between the proprotor and the wing. A downstop mounted on the wing is aligned to be in contact with the downstop striker when the proprotor is in a horizontal position. A conversion actuator moves the proprotor between a horizontal position and vertical position. A flight control computer is coupled to the output signal from the load pin and configured to control the conversion actuator, wherein the flight control computer is configured to cause the conversion actuator to increase the force if the force is less than a first selected preload value or to decrease the force if the force is greater than a second selected preload value.

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