with two or more rotors connected by power transmission

Industry

CPC
F02C3/107

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Parent Industries

FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F02Combustion engines F02CGAS-TURBINE PLANTS AIR INTAKES FOR JET-PROPULSION PLANTS CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS F02C3/00Gas-turbine plants characterised by the use of combustion products as the working fluid

Current Industry

F02C3/107with two or more rotors connected by power transmission

Industries

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Patents Grantslast 30 patents

Information Patent Grant
Gas turbine fan drive gear system
- Patent number 12,168,959
- Issue date Dec 17, 2024
- RTX Corporation
- Michael E. McCune
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Grant
Planetary gearbox for gas turbine engine
- Patent number 12,158,111
- Issue date Dec 3, 2024
- Pratt & Whitney Canada Corp.
- Michel Desjardins
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Gas turbine engine with front support arrangement
- Patent number 12,158,110
- Issue date Dec 3, 2024
- RTX Corporation
- William G. Sheridan
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Gearbox assembly for an aircraft propulsion system
- Patent number 12,146,444
- Issue date Nov 19, 2024
- Pratt & Whitney Canada Corp.
- Michel Desjardins
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Boosting gas turbine engine power with fluid motor
- Patent number 12,146,443
- Issue date Nov 19, 2024
- Pratt & Whitney Canada Corp.
- Michel Labrecque
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Low noise turbine for geared turbofan engine
- Patent number 12,123,432
- Issue date Oct 22, 2024
- RTX Corporation
- Bruce L. Morin
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Boosting gas turbine engine power with fluid motor
- Patent number 12,116,937
- Issue date Oct 15, 2024
- Pratt & Whitney Canada Corp.
- Michel Labrecque
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Fan module comprising improved sealing means for a lubricant chamber
- Patent number 12,116,901
- Issue date Oct 15, 2024
- SAFRAN AIRCRAFT ENGINES
- Julien Fabien Patrick Becoulet
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Aircraft engine having two radially offset turbines
- Patent number 12,116,928
- Issue date Oct 15, 2024
- Pratt & Whitney Canada Corp.
- David Menheere
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Reduction gearbox for gas turbine engine
- Patent number 12,092,039
- Issue date Sep 17, 2024
- Pratt & Whitney Canada Corp.
- Michel Desjardins
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Grant
Gas turbine engine compressor arrangement
- Patent number 12,085,025
- Issue date Sep 10, 2024
- RTX Corporation
- Karl L. Hasel
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Assembly for retaining a gear train in a turbomachine
- Patent number 12,085,015
- Issue date Sep 10, 2024
- SAFRAN AIRCRAFT ENGINES
- Julien Patrick Becoulet
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Curvilinear coupling for aircraft turbomachinery
- Patent number 12,071,854
- Issue date Aug 27, 2024
- SAFRAN HELICOPTER ENGINES
- Olivier Pierre Descubes
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Reduction gearbox for gas turbine engine
- Patent number 12,060,837
- Issue date Aug 13, 2024
- Pratt & Whitney Canada Corp.
- Michel Desjardins
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Geared turbofan engine with a high ratio of thrust to turbine volume
- Patent number 12,055,093
- Issue date Aug 6, 2024
- RTX Corporation
- Frederick M. Schwarz
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Geared turbofan engine gearbox arrangement
- Patent number 12,055,096
- Issue date Aug 6, 2024
- RTX Corporation
- Frederick M. Schwarz
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Geared turbine engine with relatively lightweight propulsor module
- Patent number 12,044,183
- Issue date Jul 23, 2024
- RTX Corporation
- Frederick M. Schwarz
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Gas turbine engine compression system with core compressor pressure...
- Patent number 12,024,301
- Issue date Jul 2, 2024
- Rolls-Royce PLC
- Gareth M Armstrong
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Efficient gas turbine engine installation and operation
- Patent number 12,006,835
- Issue date Jun 11, 2024
- Rolls-Royce PLC
- Nicholas Howarth
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Aircraft turbomachine
- Patent number 11,994,073
- Issue date May 28, 2024
- SAFRAN AIRCRAFT ENGINES
- Paul Ghislain Albert Levisse
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Gas turbine engine with power density range
- Patent number 11,970,984
- Issue date Apr 30, 2024
- RTX Corporation
- Frederick M. Schwarz
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Selective power distribution for an aircraft propulsion system
- Patent number 11,939,926
- Issue date Mar 26, 2024
- RTX Corporation
- Paul R. Hanrahan
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Multi-stage compressor with turbine section for fuel cell system
- Patent number 11,927,193
- Issue date Mar 12, 2024
- Garrett Transportation I Inc.
- Brent Donato
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Fan drive gear system
- Patent number 11,927,138
- Issue date Mar 12, 2024
- RTX Corporation
- William G. Sheridan
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Gas turbine engine with high speed low pressure turbine section and...
- Patent number 11,913,349
- Issue date Feb 27, 2024
- RTX Corporation
- Frederick M. Schwarz
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Aircraft turbomachine with reducer
- Patent number 11,905,889
- Issue date Feb 20, 2024
- SAFRAN AIRCRAFT ENGINES
- Marion Jeanne Pierrette Verdier
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Transmission and method for control of boost spool
- Patent number 11,898,490
- Issue date Feb 13, 2024
- RTX Corporation
- Paul R. Hanrahan
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Aircraft and direct drive engine under wing installation
- Patent number 11,898,518
- Issue date Feb 13, 2024
- General Electric Company
- Thomas Ory Moniz
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Safety apparatus
- Patent number 11,891,914
- Issue date Feb 6, 2024
- Siemens Energy Global GmbH & Co. KG
- Trevor Milne
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Modular multistage turbine system for gas turbine engines
- Patent number 11,879,386
- Issue date Jan 23, 2024
- Rolls-Royce North American Technologies Inc.
- Benjamin M. Iwrey
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

Information Patent Application
GAS TURBINE ENGINE COMPRESSOR ARRANGEMENT
- Publication number 20240410320
- Publication date Dec 12, 2024
- RTX Corporation
- Karl L. Hasel
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
GAS TURBINE ENGINE WITH HIGH SPEED LOW PRESSURE TURBINE SECTION AND...
- Publication number 20240401500
- Publication date Dec 5, 2024
- RTX Corporation
- Frederick M. Schwarz
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
TRANSMISSION AND METHOD FOR CONTROL OF BOOST SPOOL
- Publication number 20240384682
- Publication date Nov 21, 2024
- RTX Corporation
- Paul R. Hanrahan
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
BOOSTING GAS TURBINE ENGINE POWER WITH FLUID MOTOR
- Publication number 20240328364
- Publication date Oct 3, 2024
- Pratt & Whitney Canada Corp.
- Michel Labrecque
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
GAS TURBINE ENGINE COMPRESSION SYSTEM WITH CORE COMPRESSOR PRESSURE...
- Publication number 20240317411
- Publication date Sep 26, 2024
- Rolls-Royce plc
- Gareth M ARMSTRONG
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
AIRCRAFT ENGINE HAVING TWO RADIALLY OFFSET TURBINES
- Publication number 20240309803
- Publication date Sep 19, 2024
- Pratt & Whitney Canada Corp.
- David MENHEERE
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
FAN MODULE COMPRISING IMPROVED SEALING MEANS FOR A LUBRICANT CHAMBER
- Publication number 20240240573
- Publication date Jul 18, 2024
- SAFRAN AIRCRAFT ENGINES
- Julien Fabien Patrick BECOULET
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
COMPOUNDED TURBO POWER UNIT WITH BOOST COMBUSTOR
- Publication number 20240151179
- Publication date May 9, 2024
- Raytheon Technologies Corporation
- Steven W. Burd
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
POWER DEVICE CAPABLE OF GENERATING GREATER PROPELLING FORCE
- Publication number 20240083572
- Publication date Mar 14, 2024
- Xiaoyi ZHU
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
ENGINE MOUNT SYSTEM FOR A GAS TURBINE ENGINE
- Publication number 20240076050
- Publication date Mar 7, 2024
- Raytheon Technologies Corporation
- Gabriel L. Suciu
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
GAS TURBINE ENGINE COMPRESSOR ARRANGEMENT
- Publication number 20240068411
- Publication date Feb 29, 2024
- Karl L. Hasel
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
Geared Turbine Engine with Relatively Lightweight Propulsor Module
- Publication number 20240035419
- Publication date Feb 1, 2024
- Frederick M. Schwarz
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
GAS TURBINE FAN DRIVE GEAR SYSTEM
- Publication number 20230407796
- Publication date Dec 21, 2023
- Michael E. McCune
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
GAS TURBINE ENGINE WITH POWER DENSITY RANGE
- Publication number 20230383699
- Publication date Nov 30, 2023
- Raytheon Technologies Corporation
- Frederick M. Schwarz
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
PORTABLE AND WEARABLE HAND-GRASP NEURO-ORTHOSIS
- Publication number 20230366347
- Publication date Nov 16, 2023
- Battelle Memorial Institute
- David Friedenberg
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
GAS TURBINE ENGINE WITH FRONT SUPPORT ARRANGEMENT
- Publication number 20230366355
- Publication date Nov 16, 2023
- Raytheon Technologies Corporation
- William G. Sheridan
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
REDUCTION GEARBOX FOR GAS TURBINE ENGINE
- Publication number 20230358177
- Publication date Nov 9, 2023
- Pratt & Whitney Canada Corp.
- Michel Desjardins
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
TRANSMISSION AND METHOD FOR CONTROL OF BOOST SPOOL
- Publication number 20230358165
- Publication date Nov 9, 2023
- Raytheon Technologies Corporation
- Paul R. Hanrahan
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
REDUCTION GEARBOX FOR GAS TURBINE ENGINE
- Publication number 20230358178
- Publication date Nov 9, 2023
- Pratt & Whitney Canada Corp.
- Michel Desjardins
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
LOW NOISE TURBINE FOR GEARED TURBOFAN ENGINE
- Publication number 20230296114
- Publication date Sep 21, 2023
- Raytheon Technologies Corporation
- Bruce L. Morin
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
MODULAR MULTISTAGE TURBINE SYSTEM FOR GAS TURBINE ENGINES
- Publication number 20230287834
- Publication date Sep 14, 2023
- Rolls-Royce North American Technologies Inc.
- Benjamin M. Iwrey
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
PLANETARY GEARBOX FOR GAS TURBINE ENGINE
- Publication number 20230258133
- Publication date Aug 17, 2023
- Pratt & Whitney Canada Corp.
- Michel Desjardins
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
GAS TURBINE ENGINE WITH CLUTCH SYSTEM BETWEEN LOW-PRESSURE COMPRESS...
- Publication number 20230243310
- Publication date Aug 3, 2023
- Pratt & Whitney Canada Corp.
- Ghislain PLANTE
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
GAS TURBINE ENGINE COMPRESSION SYSTEM WITH CORE COMPRESSOR PRESSURE...
- Publication number 20230242264
- Publication date Aug 3, 2023
- Rolls-Royce plc
- Gareth M ARMSTRONG
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Application
GEARED ARCHITECTURE FOR HIGH SPEED AND SMALL VOLUME FAN DRIVE TURBINE
- Publication number 20230235715
- Publication date Jul 27, 2023
- Raytheon Technologies Corporation
- Michael E. McCune
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
GAS TURBINE ENGINE BEARING AND GEARBOX ARRANGEMENT
- Publication number 20230193818
- Publication date Jun 22, 2023
- William G. Sheridan
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
GAS TURBINE ENGINE WITH HIGH SPEED LOW PRESSURE TURBINE SECTION AND...
- Publication number 20230193830
- Publication date Jun 22, 2023
- Raytheon Technologies Corporation
- Frederick M. Schwarz
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
AIRCRAFT HYBRID PROPULSION FAN DRIVE GEAR SYSTEM DC MOTORS AND GENE...
- Publication number 20230182909
- Publication date Jun 15, 2023
- Raytheon Technologies Corporation
- Daniel Bernard Kupratis
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
GAS TURBINE ENGINE WITH HIGH SPEED LOW PRESSURE TURBINE SECTION AND...
- Publication number 20230167752
- Publication date Jun 1, 2023
- Raytheon Technologies Corporation
- Frederick M. Schwarz
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
GEARED TURBOFAN ENGINE WITH A HIGH RATIO OF THRUST TO TURBINE VOLUME
- Publication number 20230160337
- Publication date May 25, 2023
- Raytheon Technologies Corporation
- Frederick M. Schwarz
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES

with two or more rotors connected by power transmission

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Gas turbine fan drive gear system

Planetary gearbox for gas turbine engine

Gas turbine engine with front support arrangement

Gearbox assembly for an aircraft propulsion system

Boosting gas turbine engine power with fluid motor

Low noise turbine for geared turbofan engine

Boosting gas turbine engine power with fluid motor

Fan module comprising improved sealing means for a lubricant chamber

Aircraft engine having two radially offset turbines

Reduction gearbox for gas turbine engine

Gas turbine engine compressor arrangement

Assembly for retaining a gear train in a turbomachine

Curvilinear coupling for aircraft turbomachinery

Reduction gearbox for gas turbine engine

Geared turbofan engine with a high ratio of thrust to turbine volume

Geared turbofan engine gearbox arrangement

Geared turbine engine with relatively lightweight propulsor module

Gas turbine engine compression system with core compressor pressure...

Efficient gas turbine engine installation and operation

Aircraft turbomachine

Gas turbine engine with power density range

Selective power distribution for an aircraft propulsion system

Multi-stage compressor with turbine section for fuel cell system

Fan drive gear system

Gas turbine engine with high speed low pressure turbine section and...

Aircraft turbomachine with reducer

Transmission and method for control of boost spool

Aircraft and direct drive engine under wing installation

Safety apparatus

Modular multistage turbine system for gas turbine engines

Patents Applicationslast 30 patents

GAS TURBINE ENGINE COMPRESSOR ARRANGEMENT

GAS TURBINE ENGINE WITH HIGH SPEED LOW PRESSURE TURBINE SECTION AND...

TRANSMISSION AND METHOD FOR CONTROL OF BOOST SPOOL

BOOSTING GAS TURBINE ENGINE POWER WITH FLUID MOTOR

GAS TURBINE ENGINE COMPRESSION SYSTEM WITH CORE COMPRESSOR PRESSURE...

AIRCRAFT ENGINE HAVING TWO RADIALLY OFFSET TURBINES

FAN MODULE COMPRISING IMPROVED SEALING MEANS FOR A LUBRICANT CHAMBER

COMPOUNDED TURBO POWER UNIT WITH BOOST COMBUSTOR

POWER DEVICE CAPABLE OF GENERATING GREATER PROPELLING FORCE

ENGINE MOUNT SYSTEM FOR A GAS TURBINE ENGINE

GAS TURBINE ENGINE COMPRESSOR ARRANGEMENT

Geared Turbine Engine with Relatively Lightweight Propulsor Module

GAS TURBINE FAN DRIVE GEAR SYSTEM

GAS TURBINE ENGINE WITH POWER DENSITY RANGE

PORTABLE AND WEARABLE HAND-GRASP NEURO-ORTHOSIS

GAS TURBINE ENGINE WITH FRONT SUPPORT ARRANGEMENT

REDUCTION GEARBOX FOR GAS TURBINE ENGINE

TRANSMISSION AND METHOD FOR CONTROL OF BOOST SPOOL

REDUCTION GEARBOX FOR GAS TURBINE ENGINE

LOW NOISE TURBINE FOR GEARED TURBOFAN ENGINE

MODULAR MULTISTAGE TURBINE SYSTEM FOR GAS TURBINE ENGINES

PLANETARY GEARBOX FOR GAS TURBINE ENGINE

GAS TURBINE ENGINE WITH CLUTCH SYSTEM BETWEEN LOW-PRESSURE COMPRESS...

GAS TURBINE ENGINE COMPRESSION SYSTEM WITH CORE COMPRESSOR PRESSURE...

GEARED ARCHITECTURE FOR HIGH SPEED AND SMALL VOLUME FAN DRIVE TURBINE

GAS TURBINE ENGINE BEARING AND GEARBOX ARRANGEMENT

GAS TURBINE ENGINE WITH HIGH SPEED LOW PRESSURE TURBINE SECTION AND...

AIRCRAFT HYBRID PROPULSION FAN DRIVE GEAR SYSTEM DC MOTORS AND GENE...

GAS TURBINE ENGINE WITH HIGH SPEED LOW PRESSURE TURBINE SECTION AND...

GEARED TURBOFAN ENGINE WITH A HIGH RATIO OF THRUST TO TURBINE VOLUME