公开(公告)号：US11702189B1

公开(公告)日：2023-07-18

申请号：US17890063

申请日：2022-08-17

Applicant: Textron Innovations Inc.

Inventor： John Robert Wittmaak ,  Alan Hisashi Steinert

IPC: B64C11/30 ,  F04D29/36 ,  B64C11/06 ,  B64C11/44 ,  B64C11/34

CPC classification number: B64C11/44 ,  B64C11/06 ,  B64C11/34 ,  F04D29/362

Abstract: A blade-pitch change mechanism includes a motor comprising a rotating motor shaft and a housing, a solenoid coupled to a first end of the rotating motor shaft and to the housing, and a hub coupled with a second end of the rotating motor shaft. The hub includes a cylindrical puck having formed therein a gated castellated groove and connected to the second end of the rotating motor shaft and a cylindrical blade-pitch hub selectively couplable with the cylindrical puck via a plurality of drive pins and having formed therein a blade-pitch adjustment groove.

公开(公告)号：US11814164B1

公开(公告)日：2023-11-14

申请号：US17729646

申请日：2022-04-26

Applicant: Textron Innovations Inc.

Inventor： John Robert Wittmaak ,  Alan Hisashi Steinert

IPC: B64C29/00 ,  B64C11/30 ,  B64D27/24

CPC classification number: B64C29/0033 ,  B64C11/301 ,  B64C11/305 ,  B64D27/24

Abstract: A method of verifying operation of an aircraft in a pre-defined flight mode includes operating the aircraft in a first flight mode, commanding the aircraft to transition to a second flight mode, evaluating a plurality of motor performance parameters, and based on values of the plurality of motor performance parameters, determining whether the aircraft has successfully transitioned to the second flight mode.

公开(公告)号：US10882610B2

公开(公告)日：2021-01-05

申请号：US16256043

申请日：2019-01-24

Applicant: Textron Innovations Inc.

Inventor： John Robert Wittmaak

IPC: B64C27/12 ,  B60L7/02 ,  B60L7/10 ,  B64D41/00

Abstract: A braking system for a rotorcraft having a rotor hub assembly includes a generator having an armature mechanically coupled to the rotor hub assembly such that the armature is rotatable in response to rotation of the rotor hub assembly and a braking unit in selective electrical communication with the generator. The braking unit is adapted to apply an electrical resistance to rotation of the armature, thereby reducing a rotational speed of the rotor hub assembly.