公开(公告)号：US20170297695A1

公开(公告)日：2017-10-19

申请号：US15642279

申请日：2017-07-05

Applicant: Bell Helicopter Textron Inc.

Inventor： Joseph M. Schaeffer ,  Jignesh Patel ,  Eric O'Neill

IPC: B64C27/57 ,  G05D1/08 ,  B64C27/46

CPC classification number: B64C27/57 ,  B64C27/46 ,  G05D1/0858

Abstract: A method of assisting in rotor speed control in a rotorcraft can include measuring a rotor speed with a sensor; detecting a droop in the rotor speed beyond a lower droop limit; and commanding a decrease in collective in response to the rotor speed drooping beyond the lower droop limit. A system of assisting in rotor speed control in a rotorcraft, the system can include: a computer having a control law, the control law operable to generate a decrease collective command to an actuator in response to a rotor speed decreasing below a lower droop limit; wherein the lower droop limit is below a normal lower rotor speed range.

公开(公告)号：US09775286B2

公开(公告)日：2017-10-03

申请号：US14525410

申请日：2014-10-28

Applicant: Textron, Inc.

Inventor： Ramya Mahalingam ,  Robert James Pilon, Jr. ,  James Christopher Fox

IPC: A01D34/52 ,  A01D34/44 ,  A01D101/00 ,  A01B33/10

CPC classification number: A01D34/52 ,  A01B33/103 ,  A01D34/44 ,  A01D2101/00

Abstract: A disk for vertically cutting grass surfaces, the disk includes a center plate mountable to a shaft and a plurality of teeth extending from a circumferential edge of the center plate. Each tooth comprises a base extending from the circumferential edge of the center plate and at least one blade extending from the base at an offset angle. Each blade includes a neck extending from the base at the offset angle, and a tip extending radially outward from the neck relative to a center plane of the center plate such that the tip is offset from the center plane. The tip also extends from the neck at a yaw angle relative to the center plane such that when the disk is rotated about a rotational axis of the shaft a leading edge of the tip rotates in a different rotational plane than a trailing edge of the tip.

公开(公告)号：US20170259913A1

公开(公告)日：2017-09-14

申请号：US15600229

申请日：2017-05-19

Applicant: Bell Helicopter Textron Inc.

Inventor： Andrew Haldeman ,  Frank Bradley Stamps ,  Drew Alan Sutton ,  James Donn Hethcock

IPC: B64C27/35 ,  B64C27/78 ,  B64C27/82 ,  B64C27/41 ,  B64C27/48

CPC classification number: B64C27/35 ,  B64C27/32 ,  B64C27/41 ,  B64C27/48 ,  B64C27/52 ,  B64C27/78 ,  B64C27/82 ,  B64C29/0033 ,  F01D7/00

Abstract: A rotor hub comprises a gimbal assembly and an elastomeric centrifugal force bearing. The gimbal assembly is configured to transfer rotational movement of a mast to the rotor hub and to enable the rotor hub to flap relative to the mast. The elastomeric centrifugal force bearing is configured to withstand centrifugal force of a rotor blade when the mast is rotated and is configured to accommodate pitch changes of the rotor blade. A method comprises designing a gimbal assembly that enables a tail rotor hub to flap relative to a tail rotor mast. A centrifugal force bearing is selected that enables tail rotor blades to withstand centrifugal force and that allows for tail rotor blade pitch change articulation. Then, instructions are provided to use the gimbal assembly and the centrifugal force bearing in an in-plane tail rotor assembly.

公开(公告)号：US20170259911A1

公开(公告)日：2017-09-14

申请号：US15350073

申请日：2016-11-13

Applicant: Bell Helicopter Textron, Inc.

Inventor： Jouyoung Jason Choi ,  David Heverly ,  Michael Seifert ,  Michael Smith ,  Frank Brad Stamps ,  Thomas Parham, JR. ,  Amarjit Olenchery Kizhakkepat

IPC: B64C27/00

Abstract: A vibration attenuation system for attenuating vibrations in a mast of an aircraft includes a weight attached to the mast but free to orbit about the mast. The weight can be comprised of one or more weight assemblies. Embodiments can include a single weight, or plural weight assemblies wherein each weight assembly can include a mechanical interconnecting mechanism so that each weight assembly receives feedback regarding the position and movement of one or more other weight assemblies. Each weight can be associated with a spring that urges the weight towards a neutral position. Rotation of the mast can cause the weight to orbit about the mast and self-excite such that the weight acts against the urging of the spring towards an attenuating position.

公开(公告)号：US20170259905A1

公开(公告)日：2017-09-14

申请号：US15601679

申请日：2017-05-22

Applicant: Bell Helicopter Textron Inc.

Inventor： James Everett Kooiman ,  George Ryan Decker ,  Keith Alan Stanney ,  Robert Mark Chris

IPC: B64C3/26 ,  B64C29/00 ,  B64C3/18

Abstract: An airframe assembly for an aircraft includes a first airframe member having first and second skins with a large cell core and a solid insert joined therebetween. The solid insert has a side surface at least a portion of which is adjacent to the large cell core. The first airframe member has a first set of openings extending through the first skin, the solid insert and the second skin. The airframe assembly also includes a second airframe member having a second set of openings operable to be aligned with the first set of openings of the first airframe member. Each of a plurality of fasteners extends through one of the openings of the first set of openings and one of the openings of the second set of openings securably coupling the first airframe member to the second airframe member.

公开(公告)号：US20170225766A1

公开(公告)日：2017-08-10

申请号：US15424095

申请日：2017-02-03

Applicant: Bell Helicopter Textron Inc.

Inventor： David G. Carlson ,  John R. McCullough ,  Paul K. Oldroyd ,  Carl A. May ,  James E. Kooiman

IPC: B64C3/18 ,  B64C3/26

Abstract: In one aspect, there is a rib assembly for an aircraft wing including a rib web having a top and a bottom, the rib web includes a first laminate, a second laminate, and a honeycomb panel having an array of large cells disposed between the first laminate and the second laminate, each cell having a width of at least 1 cm; and a plurality of skin flanges for fixedly attaching the rib web to a skin of the wing, each skin flange has a base member having a first portion and a second portion and a vertical member extending from the base member. The plurality of skin flanges can be attached to the top and the bottom of the rib web such that the second portion of the base member and the vertical member are attached to the rib web.

公开(公告)号：US20170217597A1

公开(公告)日：2017-08-03

申请号：US15410015

申请日：2017-01-19

Applicant: Bell Helicopter Textron Inc.

Inventor： Bruce Bennett Bacon ,  John Elton Brunken, JR. ,  Michael Edwin Rinehart ,  Nick Pravanh

IPC: B64D27/26 ,  B64C29/00

CPC classification number: B64D27/26 ,  B64C27/00 ,  B64C29/0033 ,  B64D27/00 ,  B64D27/10 ,  B64D29/02 ,  B64D2027/262 ,  F02C7/20 ,  F05D2260/36 ,  F16B2/06 ,  F16F1/16 ,  F16F15/063 ,  Y02T50/672

Abstract: An engine mount assembly for coupling an engine to an airframe. The engine mount assembly includes a torsion bar coupled to the engine and a lateral movement control assembly coupled between the torsion bar and the airframe. The lateral movement control assembly includes a spring having a lateral stiffness. The torsion bar rotates in response to lateral movement of the engine such that the lateral movement of the engine is controllable based on the lateral stiffness of the spring.

公开(公告)号：US09701406B2

公开(公告)日：2017-07-11

申请号：US14566844

申请日：2014-12-11

Applicant: Bell Helicopter Textron Inc.

Inventor： Daniel B. Robertson ,  Dudley E. Smith

IPC: B64C29/00 ,  B64C11/28 ,  B64D35/04 ,  B64C39/04

CPC classification number: B64C29/0033 ,  B64C11/28 ,  B64C39/04 ,  B64D35/04

Abstract: A rotorcraft includes a proprotor coupled to the wing and a pusher propeller. Power is transferred from the proprotor to the pusher propeller with the use of a torque splitter. The torque splitter contains several gears, including a ring gear which rotates on an axis. The power outputted by the torque splitter is increased or decreased by selectively slowing down the rotation of the ring gear by the use of a clamp.

公开(公告)号：US20170174141A1

公开(公告)日：2017-06-22

申请号：US14973926

申请日：2015-12-18

Applicant: Textron Inc.

Inventor： Philip Jhant ,  Matthew Baekelandt ,  Christopher Furman

IPC: B60R7/04 ,  B60R21/13 ,  B62D21/18

CPC classification number: B62D21/183 ,  B60R5/00 ,  B60R7/00

Abstract: The present disclosure provides vehicle that includes an auxiliary storage compartment. In various embodiments, the auxiliary storage compartment includes a front wall, a pair of opposing sidewalls and a back wall that is disposed laterally between the sidewalls. The auxiliary storage compartment additionally includes a floor disposed between the front wall and the back wall. In various embodiments, at least one of the sidewalls comprising an access door movable between an Open position, wherein access to the auxiliary storage compartment is provided via the open access door, and a Closed position, wherein the closed access door defines the respective sidewall.

公开(公告)号：US09683652B2

公开(公告)日：2017-06-20

申请号：US14693334

申请日：2015-04-22

Applicant: Bell Helicopter Textron Inc.

Inventor： Scott Poster

IPC: F16H57/04 ,  B64C27/12

CPC classification number: F16H57/0435 ,  B64C27/12 ,  F16H57/04 ,  F16H57/0434 ,  F16H57/0495

Abstract: A rotorcraft includes a body, a rotor blade, and a power train coupled to the body and operable to rotate the rotor blade. The power train includes an engine, a gearbox in mechanical communication with the engine, and a driveshaft in mechanical communication with the gearbox. The rotorcraft also includes a sensor operable to detect a rotorcraft parameter, and a lubrication flow calculation unit operable to receive the rotorcraft parameter, generate the flow rate based on the rotorcraft parameter, and transmit the flow rate to a lubrication system configured to deliver lubricant to the gearbox at the transmitted flow rate.