公开(公告)号：US11733714B2

公开(公告)日：2023-08-22

申请号：US17149445

申请日：2021-01-14

Applicant: Bell Textron Inc.

Inventor： Steven G. Hagerott ,  Jonathan Andrew Toth

IPC: G05D1/08 ,  B64C29/00 ,  G05D1/00 ,  B64C13/50

CPC classification number: G05D1/0808 ,  B64C29/0033 ,  G05D1/0055 ,  B64C13/503

Abstract: There is disclosed in one example an inner loop controller for an aircraft flight computer, including: a stall protection circuit to compute, for an attitude angle θ, an attitude limit θmax as a function of a flight path angle (γ) and an angle of attack limit (αmax); a transfer function circuit to convert θ to an attitude rate {dot over (θ)}, wherein {dot over (θ)} is a time derivative of θ; and a load protector circuit to compute a limit on {dot over (θ)} ({dot over (θ)}max) as a function of a load factor limit (Nz,max) and a true airspeed (v).

公开(公告)号：US11732747B2

公开(公告)日：2023-08-22

申请号：US17568820

申请日：2022-01-05

Applicant: Bell Textron Inc.

Inventor： Daniel P. Sottiaux ,  Marco A. Agredano ,  Frank B. Stamps

IPC: F16C11/06 ,  F16C27/06 ,  B64C27/39 ,  B64C27/00 ,  F16F1/40

CPC classification number: F16C11/0614 ,  B64C27/001 ,  B64C27/39 ,  F16C27/06 ,  F16F1/40 ,  F16C2202/08 ,  F16C2208/10

Abstract: A laminated elastomeric journal bearing has an outer sleeve having an inner surface, at least a portion of each end of the inner surface being a concave surface of revolution, and an inner sleeve having an outer surface, at least a portion of each end of the outer surface being a convex surface of revolution. Alternating layers of elastomer and metal are located between the sleeves, with adjacent surfaces of the layers and the sleeves being adhered to each other.

公开(公告)号：US20230256831A1

公开(公告)日：2023-08-17

申请号：US18140859

申请日：2023-04-28

Applicant: Textron, Inc.

Inventor： Russell William King ,  Kevin Douglas Grove

IPC: B60L7/18 ,  B60L7/14

CPC classification number: B60L7/18 ,  B60L7/14 ,  B60L3/108

Abstract: A technique provides power-limiting regenerative braking to a utility vehicle. The technique involves detecting that the utility vehicle is moving in a forward direction at a first speed. The technique further involves applying a first regenerative braking power level to the utility vehicle in response to detecting that the utility vehicle is moving in the forward direction at the first speed. The technique further involves detecting that the utility vehicle is moving in the forward direction at a second speed which is less than the first speed. The technique further involves applying a second regenerative braking power level to the utility vehicle in response to detecting that the utility vehicle is moving in the forward direction at the second speed. The second regenerative braking power level is lower than the first regenerative braking power level.

公开(公告)号：US11718397B2

公开(公告)日：2023-08-08

申请号：US17324184

申请日：2021-05-19

Applicant: Bell Textron Inc.

Inventor： Brent C. Ross ,  Kirk L. Groninga ,  Steven R. Ivans ,  Jason Paul Hurst

IPC: B64C29/00 ,  B64C13/24 ,  B64D27/24 ,  B64D35/04

CPC classification number: B64C29/0033 ,  B64C13/24 ,  B64D27/24 ,  B64D35/04

Abstract: Embodiments include an aircraft comprising a fuselage; a wing connected to the fuselage; and first and second propulsion systems connected to the wing on opposite sides of the fuselage, wherein at least a portion of each of the first and second propulsion systems and at least a portion of the wing are tiltable between a first position in which the aircraft is in a hover mode and a second position in which the aircraft is in a cruise mode, wherein each of the propulsion systems includes pylon and a rotor assembly comprising a plurality of rotor blades.

公开(公告)号：US11718396B2

公开(公告)日：2023-08-08

申请号：US16439487

申请日：2019-06-12

Applicant: Bell Helicopter Textron Inc.

Inventor： Christopher Edward Foskey ,  Jeffrey Mark Bosworth

IPC: B64C29/00 ,  B64C11/18 ,  B64C3/38 ,  B64C11/28 ,  B64C27/51

CPC classification number: B64C29/0033 ,  B64C3/38 ,  B64C11/18 ,  B64C11/28 ,  B64C27/51

Abstract: Embodiments are directed to systems and methods for deploying an outboard rotor blade of proprotor pylon to act as an extended lifting surface. Blade control actuators may provide primary rotor flight control as well as providing fold linkage actuation when fold locks are disengaged. During cruise flight, the blade control actuator may provide feathering inputs to the extended rotor blade, wherein the amplitude and frequency of feathering inputs are tuned to mitigate undesirable wing and fuselage dynamic modes thereby enhancing aircraft stability. The deployed rotor blades also improve the total lifting area of the aircraft, which may increase aircraft range and efficiency.

公开(公告)号：US11713804B2

公开(公告)日：2023-08-01

申请号：US17307142

申请日：2021-05-04

Applicant: Bell Textron Inc.

Inventor： Eric Stephen Olson ,  David Bockmiller

IPC: F16H57/04

CPC classification number: F16H57/0427 ,  F16H57/045 ,  F16H57/0482

Abstract: An exemplary passive oil system includes a reservoir housing configured in operation to rotate around a rotational axis, the reservoir housing defining a reservoir between a top wall, a bottom wall, innermost side, and an outer sidewall; and an outlet positioned adjacent the outer sidewall to discharge a lubrication fluid contained in the reservoir in response to the reservoir housing rotating around the rotational axis.

公开(公告)号：US20230213059A1

公开(公告)日：2023-07-06

申请号：US17568820

申请日：2022-01-05

Applicant: Bell Textron Inc.

Inventor： Daniel P. Sottiaux ,  Marco A. Agredano ,  Frank B. Stamps

IPC: B64C27/35

CPC classification number: B64C27/35

Abstract: A laminated elastomeric journal bearing has an outer sleeve having an inner surface, at least a portion of each end of the inner surface being a concave surface of revolution, and an inner sleeve having an outer surface, at least a portion of each end of the outer surface being a convex surface of revolution. Alternating layers of elastomer and metal are located between the sleeves, with adjacent surfaces of the layers and the sleeves being adhered to each other.

公开(公告)号：US11691720B2

公开(公告)日：2023-07-04

申请号：US17029569

申请日：2020-09-23

Applicant: Bell Textron inc.

Inventor： Gerard Michael Schneider ,  Lawrence Michael Petsch

IPC: B64C27/78 ,  B64C27/59 ,  B64C27/72

CPC classification number: B64C27/78 ,  B64C27/59 ,  B64C27/72

Abstract: A pitch change link may include a shaft having a first end region and a second end region, and a bearing cartridge on at least one of the first end region and the second end region. The bearing cartridge may include a bearing and a bearing ring at least partially surrounding the bearing. The bearing ring may have a geometric symmetry and a cross section that is wider at a first end than at a second end, the first end may oppose the second end.

公开(公告)号：US20230202321A1

公开(公告)日：2023-06-29

申请号：US17561900

申请日：2021-12-24

Applicant: Bell Textron Inc.

Inventor： Albert Mazzei ,  Michael R. Hull ,  Yue Fan

IPC: B60L53/30 ,  B64C39/02 ,  B60L53/66

CPC classification number: B60L53/305 ,  B64C39/024 ,  B60L53/66 ,  B64C2201/042

Abstract: There is disclosed in one example, one or more tangible, non-transitory computer-readable storage media having stored thereon machine-executable instructions to: receive battery data from at least one sensor connected to a battery bank of an electric vertical takeoff and landing (eVTOL) aircraft, wherein the battery bank comprises a plurality of batteries; compute from the battery data an available flight time remaining for the eVTOL aircraft; compute a nominal flight time remaining, wherein the nominal flight time remaining excludes a reserve flight time; and display the nominal flight time remaining to a pilot in a human-readable format.

公开(公告)号：US11685515B2

公开(公告)日：2023-06-27

申请号：US17069816

申请日：2020-10-13

Applicant: Bell Textron Inc.

Inventor： Luke Dafydd Gillett ,  James Rigsby ,  Jeffrey Kirkman ,  Craig Lovell ,  Andrew Carter ,  Aaron Alexander Acee

IPC: B64C5/16 ,  B64C13/16 ,  B64C5/02 ,  B64C27/06 ,  B64C27/82

CPC classification number: B64C13/16 ,  B64C5/02 ,  B64C5/16 ,  B64C27/06 ,  B64C2027/8281

Abstract: A rotorcraft has a horizontal stabilizer movable about an axis of rotation and a horizontal stabilizer control system configured to control the horizontal stabilizer to at least one of move the rotorcraft into a minimum drag position, maintain the aircraft in a minimum drag position, efficiently achieve a maneuver, enter efficient autorotation, and maintain efficient autorotation.