Control or regulation of thrust reversers

Industry

CPC
F02K1/76

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Parent Industries

FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F02Combustion engines F02KJET-PROPULSION PLANTS F02K1/00Plants characterised by the form or arrangement of the jet pipe or nozzle Jet pipes or nozzles peculiar thereto

Current Industry

F02K1/76Control or regulation of thrust reversers

Industries

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Patents Grantslast 30 patents

Information Patent Grant
Articulating slider for nacelle
- Patent number 12,173,668
- Issue date Dec 24, 2024
- Rohr, Inc.
- Jihad Ramlaoui
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
S-hook latch
- Patent number 12,168,898
- Issue date Dec 17, 2024
- Rohr, Inc.
- Mark Hubberstey
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Apparatus for providing an electrical connection
- Patent number 12,163,487
- Issue date Dec 10, 2024
- SAFRAN NACELLES LIMITED
- James Marquis
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Nacelle for an aircraft propulsion assembly comprising a flap for c...
- Patent number 12,158,122
- Issue date Dec 3, 2024
- SAFRAN NACELLES
- Romain Gardel
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Mixed flow exhaust thrust reverser with area control nozzle systems...
- Patent number 12,146,453
- Issue date Nov 19, 2024
- Rohr, Inc.
- Johann Steven Schrell
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Thrust reverser for the nacelle of an aircraft turbofan engine
- Patent number 12,140,107
- Issue date Nov 12, 2024
- SAFRAN NACELLES
- Sebastien Laurent Marie Pascal
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Two servovalve thrust reverser actuator system
- Patent number 12,123,372
- Issue date Oct 22, 2024
- Woodward, Inc.
- William Ernest Stone
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Thrust reverser comprising movable grids and cowls assembled by rec...
- Patent number 12,110,843
- Issue date Oct 8, 2024
- SAFRAN NACELLES
- Patrick André Boileau
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Thrust reverser for turbojet engine
- Patent number 12,104,555
- Issue date Oct 1, 2024
- SAFRAN NACELLES
- Pierre Charles Caruel
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Blocker door retention assembly for an aircraft propulsion system t...
- Patent number 12,104,556
- Issue date Oct 1, 2024
- Rohr, Inc.
- Jason Habchi
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Position sensor for aircraft nacelle thrust reverser door
- Patent number 12,085,042
- Issue date Sep 10, 2024
- SAFRAN NACELLES
- Alexis Loncle
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Thrust reverser assembly for a turbojet engine
- Patent number 12,078,124
- Issue date Sep 3, 2024
- SAFRAN NACELLES
- Pierre Charles Caruel
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Limited flow thrust reverser actuating
- Patent number 12,065,987
- Issue date Aug 20, 2024
- Woodward, Inc.
- Joseph Thomas Kopecek
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Turbofan having mobile deflectors and a system for actuating the de...
- Patent number 12,049,854
- Issue date Jul 30, 2024
- Airbus Operations SAS
- Michael Belin
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Drive system for translating structure
- Patent number 12,031,500
- Issue date Jul 9, 2024
- Rohr Inc.
- Timothy Gormley
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Thrust reverser comprising a single actuator for controlling a mobi...
- Patent number 12,018,629
- Issue date Jun 25, 2024
- SAFRAN NACELLES
- Pierre Charles Caruel
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Aircraft thrust reverser comprising a braking mechanism for slowing...
- Patent number 12,006,893
- Issue date Jun 11, 2024
- SAFRAN NACELLES
- Fabien Charliac
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Cascade thrust reverser actuation assembly for a turbofan engine
- Patent number 12,000,359
- Issue date Jun 4, 2024
- General Electric Company
- Bugra Han Ertas
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
System for controlling a thrust reverser for a nacelle
- Patent number 11,965,474
- Issue date Apr 23, 2024
- SAFRAN NACELLES
- Pierre Caruel
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Thrust reverser provided with cable kinematics for scoop flaps
- Patent number 11,959,439
- Issue date Apr 16, 2024
- SAFRAN NACELLES
- Vincent Peyron
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Ultra quiet split flow thrust reverser
- Patent number 11,959,438
- Issue date Apr 16, 2024
- Medhat Osman
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Lead screw assembly
- Patent number 11,953,081
- Issue date Apr 9, 2024
- Goodrich Actuation Systems Limited
- Stephen Davies
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Thrust reverser with anti-buckling actuating system
- Patent number 11,952,963
- Issue date Apr 9, 2024
- SAFRAN NACELLES
- Xavier Cazuc
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Aircraft control architecture, of at least one actuator of a nacell...
- Patent number 11,946,436
- Issue date Apr 2, 2024
- SAFRAN NACELLES
- Hakim Maalioune
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Mobile-cowl thrust reverser comprising a thrust-reduction mechanism...
- Patent number 11,939,933
- Issue date Mar 26, 2024
- SAFRAN NACELLES
- Denis Guillois
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Tertiary lock
- Patent number 11,939,934
- Issue date Mar 26, 2024
- Woodward, Inc.
- Joseph Thomas Kopecek
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Reverse thrust system and method
- Patent number 11,933,248
- Issue date Mar 19, 2024
- Pratt & Whitney Canada Corp.
- Jagoda Krzywon
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Thrust reverser system latch assembly and method of operating same
- Patent number 11,933,247
- Issue date Mar 19, 2024
- Rohr, Inc.
- Prafull Joshi
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Drive system for translating structure
- Patent number 11,927,150
- Issue date Mar 12, 2024
- Rohr, Inc.
- Timothy Gormley
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Thrust reverser single degree of freedom actuator mechanism systems...
- Patent number 11,913,407
- Issue date Feb 27, 2024
- Rohr, Inc.
- Timothy Gormley
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS

Patents Applicationslast 30 patents

Information Patent Application
GAS TURBINE ENGINE WITH CLUTCH ASSEMBLY
- Publication number 20240417101
- Publication date Dec 19, 2024
- GENERAL ELECTRIC COMPANY
- Brian Lewis Devendorf
- B32 - LAYERED PRODUCTS
Information Patent Application
PROPULSION SYSTEM AND METHOD FOR OPERATION
- Publication number 20240401490
- Publication date Dec 5, 2024
- GENERAL ELECTRIC COMPANY
- Sridhar Adibhatla
- B32 - LAYERED PRODUCTS
Information Patent Application
AIRCRAFT NACELLE EQUIPPED WITH AT LEAST ONE THRUST REVERSAL DEVICE...
- Publication number 20240360802
- Publication date Oct 31, 2024
- Airbus Operations SAS
- Frédéric CHELIN
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
REVERSER WITH MOVABLE CASCADES FOR AN AIRCRAFT PROPULSION ASSEMBLY,...
- Publication number 20240344486
- Publication date Oct 17, 2024
- SAFRAN NACELLES
- Patrick André BOILEAU
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
BONDED DOUBLE WALL SEAL ASSEMBLY
- Publication number 20240328371
- Publication date Oct 3, 2024
- The Boeing Company
- Jessica Marie-Meyer Ribble
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
THRUST REVERSER WITH BLOCKER DOOR FOLDING LINKAGE
- Publication number 20240301841
- Publication date Sep 12, 2024
- Rohr, Inc.
- Timothy Gormley
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
LIMITED FLOW THRUST REVERSER ACTUATING
- Publication number 20240301842
- Publication date Sep 12, 2024
- WOODWARD, INC.
- Joseph Thomas Kopecek
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
THRUST REVERSER WITH LOST MOTION DEVICE
- Publication number 20240301843
- Publication date Sep 12, 2024
- Rohr, Inc.
- Timothy Gormley
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
THREE SERVOVALVE THRUST REVERSER ACTUATOR SYSTEM
- Publication number 20240287949
- Publication date Aug 29, 2024
- WOODWARD, INC.
- Jeffrey Michael Brandt
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
TWO SERVOVALVE THRUST REVERSER ACTUATOR SYSTEM
- Publication number 20240287948
- Publication date Aug 29, 2024
- WOODWARD, INC.
- William Ernest Stone
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
PRESSURE MEASUREMENT BAR IMPROVING THE MONITORING OF UNSTEADY AEROD...
- Publication number 20240280064
- Publication date Aug 22, 2024
- Airbus Operations SAS
- Nicolas DUPE
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
NOZZLE ASSEMBLY FOR USE WITH A PROPULSION SYSTEM AND SLEEVE ASSEMBL...
- Publication number 20240280065
- Publication date Aug 22, 2024
- GULFSTREAM AEROSPACE CORPORATION
- Derek Muzychka
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
THRUST REVERSER ASSEMBLY FOR A TURBOJET ENGINE
- Publication number 20240254946
- Publication date Aug 1, 2024
- SAFRAN NACELLES
- Pierre Charles CARUEL
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
AIRCRAFT PROPULSION ASSEMBLY COMPRISING AN ACTUATOR CONNECTED TO A...
- Publication number 20240240599
- Publication date Jul 18, 2024
- SAFRAN NACELLES
- Patrick André BOILEAU
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
TURBOFAN HAVING MOBILE DEFLECTORS AND A SYSTEM FOR ACTUATING THE DE...
- Publication number 20240229742
- Publication date Jul 11, 2024
- Airbus Operations SAS
- Michael BELIN
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
THRUST REVERSER FOR THE NACELLE OF AN AIRCRAFT TURBOFAN ENGINE
- Publication number 20240209813
- Publication date Jun 27, 2024
- SAFRAN NACELLES
- Sebastien Laurent Marie PASCAL
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
ELECTRO-HYDROSTATIC ACTUATION SYSTEM FOR A THRUST REVERSER FOR AN A...
- Publication number 20240200508
- Publication date Jun 20, 2024
- SAFRAN LANDING SYSTEMS
- Jean-Baptiste KAMIS
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Application
TRAVELING FINGER LOCK FOR AN ACTUATOR
- Publication number 20240183325
- Publication date Jun 6, 2024
- WOODWARD, INC.
- Joseph Thomas Kopecek
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
INTEGRATED THRUST REVERSER AND BRAKE CONTROL FOR AN AIRCRAFT
- Publication number 20240175409
- Publication date May 30, 2024
- Raytheon Technologies Corporation
- David Wasselin
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
ACTUATING SYSTEM FOR A CASCADE THRUST REVERSER
- Publication number 20240175410
- Publication date May 30, 2024
- SAFRAN NACELLES
- Vincent Jean-François PEYRON
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
SELF-DAMPING ACTUATOR
- Publication number 20240167432
- Publication date May 23, 2024
- WOODWARD, INC.
- Joseph Thomas Kopecek
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
SYSTEM FOR SUPPLYING POWER TO A PORTABLE BATTERY USING AT LEAST ONE...
- Publication number 20240145840
- Publication date May 2, 2024
- LAT Enterprises, Inc., d/b/a MediPak Energy Systems
- Laura Thiel
- A41 - WEARING APPAREL
Information Patent Application
TURBOFAN HAVING MOBILE DEFLECTORS AND A SYSTEM FOR ACTUATING THE DE...
- Publication number 20240133351
- Publication date Apr 25, 2024
- Airbus Operations SAS
- Michael BELIN
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
AIRCRAFT ENGINE NACELLE PROVIDED WITH A THRUST REVERSER HAVING A MO...
- Publication number 20240124148
- Publication date Apr 18, 2024
- AIRBUS OPERATIONS (SAS)
- Frédéric Chelin
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
NOZZLE ASSEMBLY FOR USE WITH A PROPULSION SYSTEM
- Publication number 20240125286
- Publication date Apr 18, 2024
- GULFSTREAM AEROSPACE CORPORATION
- Derek Muzychka
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
THRUST REVERSER SYSTEM WITH ANGLED DOOR PIVOT AXES
- Publication number 20240117781
- Publication date Apr 11, 2024
- Rohr, Inc.
- Timothy Gormley
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
THRUST REVERSER COMPRISING MOVABLE GRIDS AND COWLS ASSEMBLED BY REC...
- Publication number 20240093661
- Publication date Mar 21, 2024
- SAFRAN NACELLES
- Patrick André BOILEAU
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
EXHAUST NOZZLE ASSEMBLY, PROPULSION SYSTEM EMPLOYING THE EXHAUST NO...
- Publication number 20240059421
- Publication date Feb 22, 2024
- GULFSTREAM AEROSPACE CORPORATION
- Donald Freund
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
CASCADE THRUST REVERSER ACTUATION ASSEMBLY FOR A TURBOFAN ENGINE
- Publication number 20240060458
- Publication date Feb 22, 2024
- GENERAL ELECTRIC COMPANY
- Bugra Han Ertas
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
ADVANCE RATIO FOR SINGLE UNDUCTED ROTOR ENGINE
- Publication number 20230415914
- Publication date Dec 28, 2023
- GENERAL ELECTRIC COMPANY
- Syed Arif Khalid
- B32 - LAYERED PRODUCTS

Control or regulation of thrust reversers

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Articulating slider for nacelle

S-hook latch

Apparatus for providing an electrical connection

Nacelle for an aircraft propulsion assembly comprising a flap for c...

Mixed flow exhaust thrust reverser with area control nozzle systems...

Thrust reverser for the nacelle of an aircraft turbofan engine

Two servovalve thrust reverser actuator system

Thrust reverser comprising movable grids and cowls assembled by rec...

Thrust reverser for turbojet engine

Blocker door retention assembly for an aircraft propulsion system t...

Position sensor for aircraft nacelle thrust reverser door

Thrust reverser assembly for a turbojet engine

Limited flow thrust reverser actuating

Turbofan having mobile deflectors and a system for actuating the de...

Drive system for translating structure

Thrust reverser comprising a single actuator for controlling a mobi...

Aircraft thrust reverser comprising a braking mechanism for slowing...

Cascade thrust reverser actuation assembly for a turbofan engine

System for controlling a thrust reverser for a nacelle

Thrust reverser provided with cable kinematics for scoop flaps

Ultra quiet split flow thrust reverser

Lead screw assembly

Thrust reverser with anti-buckling actuating system

Aircraft control architecture, of at least one actuator of a nacell...

Mobile-cowl thrust reverser comprising a thrust-reduction mechanism...

Tertiary lock

Reverse thrust system and method

Thrust reverser system latch assembly and method of operating same

Drive system for translating structure

Thrust reverser single degree of freedom actuator mechanism systems...

Patents Applicationslast 30 patents

GAS TURBINE ENGINE WITH CLUTCH ASSEMBLY

PROPULSION SYSTEM AND METHOD FOR OPERATION

AIRCRAFT NACELLE EQUIPPED WITH AT LEAST ONE THRUST REVERSAL DEVICE...

REVERSER WITH MOVABLE CASCADES FOR AN AIRCRAFT PROPULSION ASSEMBLY,...

BONDED DOUBLE WALL SEAL ASSEMBLY

THRUST REVERSER WITH BLOCKER DOOR FOLDING LINKAGE

LIMITED FLOW THRUST REVERSER ACTUATING

THRUST REVERSER WITH LOST MOTION DEVICE

THREE SERVOVALVE THRUST REVERSER ACTUATOR SYSTEM

TWO SERVOVALVE THRUST REVERSER ACTUATOR SYSTEM

PRESSURE MEASUREMENT BAR IMPROVING THE MONITORING OF UNSTEADY AEROD...

NOZZLE ASSEMBLY FOR USE WITH A PROPULSION SYSTEM AND SLEEVE ASSEMBL...

THRUST REVERSER ASSEMBLY FOR A TURBOJET ENGINE

AIRCRAFT PROPULSION ASSEMBLY COMPRISING AN ACTUATOR CONNECTED TO A...

TURBOFAN HAVING MOBILE DEFLECTORS AND A SYSTEM FOR ACTUATING THE DE...

THRUST REVERSER FOR THE NACELLE OF AN AIRCRAFT TURBOFAN ENGINE

ELECTRO-HYDROSTATIC ACTUATION SYSTEM FOR A THRUST REVERSER FOR AN A...

TRAVELING FINGER LOCK FOR AN ACTUATOR

INTEGRATED THRUST REVERSER AND BRAKE CONTROL FOR AN AIRCRAFT

ACTUATING SYSTEM FOR A CASCADE THRUST REVERSER

SELF-DAMPING ACTUATOR

SYSTEM FOR SUPPLYING POWER TO A PORTABLE BATTERY USING AT LEAST ONE...

TURBOFAN HAVING MOBILE DEFLECTORS AND A SYSTEM FOR ACTUATING THE DE...

AIRCRAFT ENGINE NACELLE PROVIDED WITH A THRUST REVERSER HAVING A MO...

NOZZLE ASSEMBLY FOR USE WITH A PROPULSION SYSTEM

THRUST REVERSER SYSTEM WITH ANGLED DOOR PIVOT AXES

THRUST REVERSER COMPRISING MOVABLE GRIDS AND COWLS ASSEMBLED BY REC...

EXHAUST NOZZLE ASSEMBLY, PROPULSION SYSTEM EMPLOYING THE EXHAUST NO...

CASCADE THRUST REVERSER ACTUATION ASSEMBLY FOR A TURBOFAN ENGINE

ADVANCE RATIO FOR SINGLE UNDUCTED ROTOR ENGINE