公开(公告)号：US20180362153A1

公开(公告)日：2018-12-20

申请号：US15627819

申请日：2017-06-20

Applicant: Bell Helicopter Textron Inc.

Inventor： Jared Mark Paulson ,  Bryan Marshall ,  Christopher E. Foskey

IPC: B64C27/00 ,  B64C27/473 ,  B64C27/82 ,  F03D13/35

Abstract: The present invention includes a balancing system that includes a weight box, mounted substantially within the rotor-blade spar, flush with a rotor-blade spar outer surface, operably accessible from a rotor-blade tip, and retained within the rotor-blade spar by a weight-box retention pin, one or more weight-box contact surfaces bonded to a rotor-blade-spar inner surface, or a weight-box lip providing a bearing contact with an edge of a spar rotor-blade spar cutout; and a weight package attached to the weight box, the weight package including a weight-box cover, two or more weight guide-rods attached to the weight-box cover, wherein one of the two or more weight guide-rods is positioned forward of a pitch change axis or center of twist and wherein one of the two weight guide-rods is positioned aft of the pitch change axis or center of twist, and one or more balance weights mounted on the weight guide-rods.

公开(公告)号：US20180362152A1

公开(公告)日：2018-12-20

申请号：US16103083

申请日：2018-08-14

Applicant: Bell Helicopter Textron Inc.

Inventor： Dudley E. Smith ,  Cory M. Hitte ,  Bryan Marshall ,  Carlos Alexander Fenny

IPC: B64C27/00 ,  B64D27/24 ,  B64C27/12 ,  B64D27/02

Abstract: Embodiments refer generally to systems and methods for providing autorotative enhancement for helicopters using an autorotative assist unit coupled to the transmission of the helicopter. Methods of utilizing an autorotative assist unit as well as retrofitting an autorotative assist unit to an existing helicopter are also disclosed. By employing an autorotative assist unit, improved autorotation can be achieved without the need to increase the weight of the rotor.

公开(公告)号：US20180135728A1

公开(公告)日：2018-05-17

申请号：US15350338

申请日：2016-11-14

Applicant: Bell Helicopter Textron, Inc.

Inventor： Jared Mark Paulson ,  Bryan Marshall ,  Paul Sherrill ,  Bryan Judd

IPC: F16F15/32 ,  B64C11/20 ,  B64C27/473 ,  B64C29/00 ,  B64C27/04 ,  F16F15/34

Abstract: A weight system for a rotor blade includes a weight box open in an outboard direction, a weight guide rod connected to the weight box, the weight guide rod extending in a spanwise direction through an interior of the weight box, and a span balance weight disposed within the weight box, the span balance weight being captured between the weight guide rod and the weight box.

公开(公告)号：US11014656B2

公开(公告)日：2021-05-25

申请号：US15627819

申请日：2017-06-20

Applicant: Bell Helicopter Textron Inc.

Inventor： Jared Mark Paulson ,  Bryan Marshall ,  Christopher E. Foskey

IPC: B64C27/00 ,  B64C27/473 ,  B64C27/82 ,  F03D13/35 ,  B64C11/00 ,  F03D1/06

Abstract: The present invention includes a balancing system that includes a weight box, mounted substantially within the rotor-blade spar, flush with a rotor-blade spar outer surface, operably accessible from a rotor-blade tip, and retained within the rotor-blade spar by a weight-box retention pin, one or more weight-box contact surfaces bonded to a rotor-blade-spar inner surface, or a weight-box lip providing a bearing contact with an edge of a spar rotor-blade spar cutout; and a weight package attached to the weight box, the weight package including a weight-box cover, two or more weight guide-rods attached to the weight-box cover, wherein one of the two or more weight guide-rods is positioned forward of a pitch change axis or center of twist and wherein one of the two weight guide-rods is positioned aft of the pitch change axis or center of twist, and one or more balance weights mounted on the weight guide-rods.

公开(公告)号：US10077105B2

公开(公告)日：2018-09-18

申请号：US15383458

申请日：2016-12-19

Applicant: Bell Helicopter Textron Inc.

Inventor： Dudley E. Smith ,  Cory M. Hitte ,  Bryan Marshall ,  Carlos Alexander Fenny

IPC: B64C27/12 ,  B64D27/24 ,  B64C27/00 ,  B64D27/02

CPC classification number: B64C27/006 ,  B64C27/12 ,  B64D27/24 ,  B64D2027/026 ,  Y02T50/62 ,  Y10T29/49117

Abstract: Embodiments refer generally to systems and methods for providing autorotative enhancement for helicopters using an autorotative assist unit coupled to the transmission of the helicopter. Methods of utilizing an autorotative assist unit as well as retrofitting an autorotative assist unit to an existing helicopter are also disclosed. By employing an autorotative assist unit, improved autorotation can be achieved without the need to increase the weight of the rotor.