公开(公告)号：US20220355924A1

公开(公告)日：2022-11-10

申请号：US17307845

申请日：2021-05-04

Applicant: Bell Textron Inc.

Inventor： Thomas C. Parham, JR. ,  Frank Bradley Stamps ,  Jouyoung Jason Choi ,  Albert Gerard Brand ,  Michael Scott Seifert ,  Richard E. Rauber ,  John E. Brunken, JR.

IPC: B64C29/00 ,  B64C11/00 ,  B64C11/06 ,  B64C11/32

Abstract: A gimbaled rotor assembly for an aircraft. The gimbaled rotor assembly including a static mast; a spherical bearing comprising an inner component and an outer component pivotable relative to each other about a bearing focus, the inner component fixedly coupled to the static mast; a rotor hub rotatably coupled to the outer component, allowing for relative rotation of the rotor hub about a rotor axis and for pivoting together with the outer component about the bearing focus; and a primary hub spring coupling the outer component to the static mast and configured for opposing pivoting of the rotor hub about the bearing focus from a neutral position.

公开(公告)号：US11691723B2

公开(公告)日：2023-07-04

申请号：US17307845

申请日：2021-05-04

Applicant: Bell Textron Inc.

Inventor： Thomas C. Parham, Jr. ,  Frank Bradley Stamps ,  Jouyoung Jason Choi ,  Albert Gerard Brand ,  Michael Scott Seifert ,  Richard E. Rauber ,  John E. Brunken, Jr.

IPC: B64C29/00 ,  B64C11/32 ,  B64C11/00 ,  B64C11/02

CPC classification number: B64C29/0033 ,  B64C11/008 ,  B64C11/02 ,  B64C11/32

Abstract: A gimbaled rotor assembly for an aircraft. The gimbaled rotor assembly including a static mast; a spherical bearing comprising an inner component and an outer component pivotable relative to each other about a bearing focus, the inner component fixedly coupled to the static mast; a rotor hub rotatably coupled to the outer component, allowing for relative rotation of the rotor hub about a rotor axis and for pivoting together with the outer component about the bearing focus; and a primary hub spring coupling the outer component to the static mast and configured for opposing pivoting of the rotor hub about the bearing focus from a neutral position.

公开(公告)号：US20210197962A1

公开(公告)日：2021-07-01

申请号：US16790304

申请日：2020-02-13

Applicant: Bell Textron Inc.

Inventor： Albert Gerard Brand ,  Ronald Lorenz Kisor

IPC: B64C27/00 ,  B64C27/57 ,  B64D43/02

Abstract: A system and method for protecting a rotorcraft from entering a vortex ring state, the method including monitoring a vertical speed of a rotorcraft, comparing the vertical speed to a vertical speed safety threshold, and performing vortex ring state (VRS) avoidance in response to the vertical speed exceeding the vertical speed safety threshold. The performing the VRS avoidance includes determining a power margin available from one or more engines of the rotorcraft, limiting the vertical speed of the rotorcraft in response to the power margin exceeding a threshold, and increasing a forward airspeed of the rotorcraft in response to the power margin not exceeding the threshold.