公开(公告)号：US20200255133A1

公开(公告)日：2020-08-13

申请号：US16272091

申请日：2019-02-11

Applicant: Bell Helicopter Textron Inc.

Inventor： Timothy Kent LEDBETTER ,  Thomas Parham ,  Dalton T. Hampton ,  Frank Stamps ,  Zachary Edwin Dailey ,  Robert L. Milliken

IPC: B64C27/35 ,  B64C27/46

Abstract: An example of a hub for a tail rotor includes a body configured to couple to a mast of a rotor system, a trunnion disposed within the body, first and second shafts disposed on opposite sides of the trunnion, first and second end plates secured to the body, and first and second end bearings, the first end bearing disposed between the first shaft and the first end plate and the second end bearing disposed between the second shaft and the second end plate.

公开(公告)号：US10800518B2

公开(公告)日：2020-10-13

申请号：US16272091

申请日：2019-02-11

Applicant: Bell Helicopter Textron Inc.

Inventor： Timothy Kent Ledbetter ,  Thomas Parham ,  Dalton T. Hampton ,  Frank Stamps ,  Zachary Edwin Dailey ,  Robert L. Milliken

IPC: B64C27/35 ,  B64C27/46

Abstract: An example of a hub for a tail rotor includes a body configured to couple to a mast of a rotor system, a trunnion disposed within the body, first and second shafts disposed on opposite sides of the trunnion, first and second end plates secured to the body, and first and second end bearings, the first end bearing disposed between the first shaft and the first end plate and the second end bearing disposed between the second shaft and the second end plate.

公开(公告)号：US11022213B2

公开(公告)日：2021-06-01

申请号：US16105116

申请日：2018-08-20

Applicant: Bell Helicopter Textron Inc.

Inventor： Carlos Alexander Fenny ,  Frank Stamps

IPC: F16H61/02 ,  F16H61/12 ,  F16H3/083 ,  F16H3/097 ,  F16H61/00 ,  B64C29/00 ,  B64D35/04 ,  F16H47/02

Abstract: An aircraft includes a variable-speed gearbox. The variable-speed gearbox includes a low-speed gear train and a high-speed gear train, each gear train of which is configured to selectively provide torque from an engine of the aircraft to a proprotor. The variable-speed gearbox also includes a hydraulic system configured to provide torque to the proprotor. The hydraulic system includes a hydraulic pump driven by the engine of the tiltrotor aircraft and a variable-displacement motor driven by a hydraulic fluid from the hydraulic pump.

公开(公告)号：US20200056696A1

公开(公告)日：2020-02-20

申请号：US16105116

申请日：2018-08-20

Applicant: Bell Helicopter Textron Inc.

Inventor： Carlos Alexander Fenny ,  Frank Stamps

IPC: F16H61/02 ,  F16H61/12 ,  F16H3/083 ,  F16H3/097 ,  F16H47/02 ,  F16H61/00 ,  B64C29/00 ,  B64D35/04

Abstract: An aircraft includes a variable-speed gearbox. The variable-speed gearbox includes a low-speed gear train and a high-speed gear train, each gear train of which is configured to selectively provide torque from an engine of the aircraft to a proprotor. The variable-speed gearbox also includes a hydraulic system configured to provide torque to the proprotor. The hydraulic system includes a hydraulic pump driven by the engine of the tiltrotor aircraft and a variable-displacement motor driven by a hydraulic fluid from the hydraulic pump.

公开(公告)号：US10960969B2

公开(公告)日：2021-03-30

申请号：US16169761

申请日：2018-10-24

Applicant: Bell Helicopter Textron Inc.

Inventor： Jouyoung Jason Choi ,  Frank Stamps

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

Abstract: A method of increasing a stability speed of a tiltrotor aircraft includes pivoting a rotor assembly having at least three rotor blades from a first position for operating the tiltrotor aircraft in a helicopter mode to a second position for operating the tiltrotor aircraft in an airplane mode, and increasing a stiffness of the rotor assembly when the rotor assembly is in the second position.