公开(公告)号：US20220396353A1

公开(公告)日：2022-12-15

申请号：US17342963

申请日：2021-06-09

Applicant: Bell Textron Inc.

Inventor： Charles Eric COVINGTON ,  Chia-Wei SU ,  Darren Gregory LANG ,  Thomas PARSONS ,  Cody Earl FEGELY

IPC: B64C27/12 ,  B64D35/08

Abstract: A rotorcraft has a drive system including a main rotor coupled to a main rotor gearbox to rotate the main rotor at a rotor speed, a main engine coupled to the drive system to provide a first power, a supplemental engine coupled, when a first clutch is engaged, to the drive system to provide a second power additive to the first power, and a control system operable to control the main engine and the supplemental engine to provide a total power demand, where the main engine is controlled based on variations in rotor speed and a power compensation command to produce the first power, and the supplemental engine is controlled to produce the second power in response to a supplemental power demand.

公开(公告)号：US20220333562A1

公开(公告)日：2022-10-20

申请号：US17235239

申请日：2021-04-20

Applicant: Bell Textron Inc.

Inventor： Thomas PARSONS ,  Charles Eric COVINGTON

IPC: F02M35/10 ,  F02C3/00

Abstract: A system for optimizing engine air-mass-flow intake of an aircraft includes a forward-facing airframe-inlet duct interoperably coupled to an inlet of an engine of the aircraft, an air-mass-flow bypass mechanism coupled to the forward-facing airframe-inlet duct and adjustable to allow a selected amount of air entering an inlet of the forward-facing airframe-inlet duct to bypass the inlet of the engine, and an air-pressure sensor arranged in the forward-facing airframe-inlet duct adjacent to the inlet of the engine. A measured value (“PT1”) from the air-pressure sensor is used to determine a degree to which the air-mass-flow bypass mechanism is to be opened.

公开(公告)号：US20220333567A1

公开(公告)日：2022-10-20

申请号：US17235225

申请日：2021-04-20

Applicant: Bell Textron Inc.

Inventor： Thomas PARSONS ,  Charles Eric COVINGTON

IPC: F02M35/10 ,  F02C3/00

Abstract: A method of optimizing engine air-mass-flow intake of an aircraft includes determining air mass flow (“M1”) at a forward-facing airframe inlet duct. The forward-facing airframe inlet duct includes an air-mass-flow bypass mechanism. The method also includes determining required air mass flow (“MR”) of an engine coupled to the forward-facing airframe inlet duct, determining an air-mass-flow difference (“M3”) between M1 and MR, and adjusting the air-mass-flow bypass mechanism to pass M3 such that at least a portion of M3 does not reach the engine.