Mass distribution method and apparatus

    公开(公告)号:US12110102B2

    公开(公告)日:2024-10-08

    申请号:US18022384

    申请日:2021-08-23

    发明人: Jason Hill

    摘要: Disclosed is a helicopter having a longitudinal axis, a lateral axis and a vertical axis, a helicopter centre of mass and a maximum gross mass of less than 5000 kg, the helicopter comprising a fuselage elongate along the longitudinal axis, the fuselage comprising an aerodynamically shaped shell defining a front, a rear, a top and a bottom of the fuselage and a passenger cabin therein having two forward-facing front seating positions for the pilot and a co-pilot or a passenger, and forward-facing rear seating positions for at least 2 passengers, optionally 3 passengers; a primary fuel cell mounted substantially behind the passenger cabin; the front seating position for the pilot having a centre of mass at a first location substantially in front of the rotor hub location, and the primary fuel cell having a centre of mass at a second location substantially behind the rotor hub location; a landing gear arrangement; a power plant mounted substantially above and behind the passenger cabin, wherein the primary fuel cell is arranged to provide fuel to the power plant; and a secondary fuel cell having a centre of mass at a nose location in front of the rotor hub location by at least 1500 mm.

    SELF-RIGHTING AERONAUTICAL VEHICLE AND METHOD OF USE

    公开(公告)号:US20230060888A1

    公开(公告)日:2023-03-02

    申请号:US17948500

    申请日:2022-09-20

    申请人: Gaofei YAN James DEES

    发明人: Gaofei YAN James DEES

    摘要: An aeronautical vehicle that rights itself from an inverted state to an upright state has a self-righting frame assembly has a protrusion extending upwardly from a central vertical axis. The protrusion provides an initial instability to begin a self-righting process when the aeronautical vehicle is inverted on a surface. A propulsion system, such as rotor driven by a motor can be mounted in a central void of the self-righting frame assembly and oriented to provide a lifting force. A power supply is mounted in the central void of the self-righting frame assembly and operationally connected to the at least one rotor for rotatably powering the rotor. An electronics assembly is also mounted in the central void of the self-righting frame for receiving remote control commands and is communicatively interconnected to the power supply for remotely controlling the aeronautical vehicle to take off, to fly, and to land on a surface.

    SYSTEM AND METHOD FOR ADJUSTABLE BALLAST

    公开(公告)号:US20210316843A1

    公开(公告)日:2021-10-14

    申请号:US17308309

    申请日:2021-05-05

    申请人: Bell Textron Inc.

    IPC分类号: B64C17/00

    摘要: A movable ballast system for an aircraft includes first and second ballast docks secured to the aircraft. The first ballast dock includes a first housing and a first ballast tray secured within the first housing. The first ballast tray includes a plurality of channels. The second ballast dock is positioned aft of a CG of the aircraft and includes a second housing and a second ballast tray secured within the second housing. The second ballast tray includes a plurality of channels. The movable ballast system includes a plurality of movable ballasts, each movable ballast of the plurality of movable ballasts being configured to fit within at least one channel of each of the plurality of channels of the first and second ballast trays.

    SELF-RIGHTING AERONAUTICAL VEHICLE AND METHOD OF USE

    公开(公告)号:US20200247522A1

    公开(公告)日:2020-08-06

    申请号:US16799799

    申请日:2020-02-24

    申请人: Gaofei YAN James Dees

    发明人: Gaofei YAN James Dees

    摘要: An aeronautical vehicle that rights itself from an inverted state to an upright state has a self-righting frame assembly has a protrusion extending upwardly from a central vertical axis. The protrusion provides an initial instability to begin a self-righting process when the aeronautical vehicle is inverted on a surface. A propulsion system, such as rotor driven by a motor can be mounted in a central void of the self-righting frame assembly and oriented to provide a lifting force. A power supply is mounted in the central void of the self-righting frame assembly and operationally connected to the at least one rotor for rotatably powering the rotor. An electronics assembly is also mounted in the central void of the self-righting frame for receiving remote control commands and is communicatively interconnected to the power supply for remotely controlling the aeronautical vehicle to take off, to fly, and to land on a surface.

    Semi-active tuned mass damper to eliminate limit-cycle oscillation

    公开(公告)号:US10539201B2

    公开(公告)日:2020-01-21

    申请号:US15810793

    申请日:2017-11-13

    摘要: Methods of damping vibrations in a host structure are described. In one embodiment, the vibrations can be damped using a tuned mass damper. The tuned mass damper can include a suspended mass with magnets which is configured to move in response to current being applied to a voice coil. The tuned mass damper can damp vibrations resulting from an external load applied to the host structure, such as an external aerodynamic load. In one embodiment, the tuned mass damper can be mounted within a wind tunnel model undergoing transonic testing. The tuned mass damper can be operated to limit potentially destructive vibrations which can occur during testing.