with aerodynamic drag devices on the blades

Industry

CPC
F03D7/0252

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Parent Industries

FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F03Liquid processing machines F03DWIND MOTORS F03D7/00Controlling wind motors

Current Industry

F03D7/0252with aerodynamic drag devices on the blades

Industries

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Patents Grantslast 30 patents

Information Patent Grant
Method of shutting down a wind turbine
- Patent number 11,994,105
- Issue date May 28, 2024
- Vestas Wind Systems A/S
- Karthik Vasudevan
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Grant
Stopping a wind turbine rotor using pre-set pitch rates
- Patent number 11,959,460
- Issue date Apr 16, 2024
- Vestas Wind Systems A/S
- Keld Hammerum
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Relating to wind turbines having blades equipped with boundary laye...
- Patent number 11,248,584
- Issue date Feb 15, 2022
- Vestas Wind Systems A/S
- Jesper Sandberg Thomsen
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Grant
Wind turbine with deployable air deflectors
- Patent number 10,844,837
- Issue date Nov 24, 2020
- GE Infrastructure Technology, LLC
- Jonathon P. Baker
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Grant
Method and device for controlling floating body wind turbine power...
- Patent number 10,544,777
- Issue date Jan 28, 2020
- MHI Vestas Offshore Wind A/S
- Tsuyoshi Wakasa
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Grant
Wind turbine air deflector system control
- Patent number 10,385,826
- Issue date Aug 20, 2019
- GE Infrastructure Technology, LLC
- Jeffrey A. Butterworth
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Method and device for controlling floating body wind turbine power...
- Patent number 10,024,303
- Issue date Jul 17, 2018
- MHI VESTAS OFFSHORE WIND A/S
- Tsuyoshi Wakasa
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Flow deflection device of a wind turbine
- Patent number 9,995,270
- Issue date Jun 12, 2018
- Siemens Aktiengesellschaft
- Peder Bay Enevoldsen
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Wind turbine blade
- Patent number 9,759,191
- Issue date Sep 12, 2017
- Alstom Renewable Technologies
- Jaume Betran Palomas
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Rotatable aerodynamic surface features for wind turbine rotor blades
- Patent number 9,752,559
- Issue date Sep 5, 2017
- General Electric Company
- Stefan Herr
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Electric motor clamping system
- Patent number 9,614,465
- Issue date Apr 4, 2017
- Moog Inc.
- Michael H. Shriver
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Centrifugally driven aerodynamic rotor blade brake assembly
- Patent number 9,470,209
- Issue date Oct 18, 2016
- Deka Products Limited Partnership
- Dean Kamen
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Wind turbine rotor blade having a spoiler
- Patent number 9,267,491
- Issue date Feb 23, 2016
- General Electric Company
- Alexander William Vossler
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Wind turbine with control system
- Patent number 8,870,539
- Issue date Oct 28, 2014
- XEMC, Xiangtan Electric Manufacturing Group Corporation Ltd.
- Jonas Hallström
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Control device and method for an aerodynamic brake of a wind energy...
- Patent number 8,734,104
- Issue date May 27, 2014
- Claus Colling
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Centrifugally driven aerodynamic rotor blade brake assembly
- Patent number 8,714,925
- Issue date May 6, 2014
- Deka Products Limited Partnership
- Dean Kamen
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Method for shut down of a wind turbine having rotor blades with fai...
- Patent number 8,491,262
- Issue date Jul 23, 2013
- General Electric Company
- Edward Lee McGrath
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Wind turbine blade tip brake apparatus and method
- Patent number 8,403,641
- Issue date Mar 26, 2013
- Paul Lewis Gay
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Load mitigation device for wind turbine blades
- Patent number 8,251,657
- Issue date Aug 28, 2012
- Siemens Aktiengesellschaft
- John M. Obrecht
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Wind turbine with deployable air deflectors
- Patent number 8,192,161
- Issue date Jun 5, 2012
- Frontier Wind, LLC
- Jonathon P. Baker
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Wind turbine blade with deflectable flaps
- Patent number 8,087,889
- Issue date Jan 3, 2012
- Gamesa Innovation & Technology, S.L.
- Christian Meldgaard
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Power generating system including modular wind turbine-generator as...
- Patent number 8,013,464
- Issue date Sep 6, 2011
- Cleanfield Energy Corp.
- Mihail Stern
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Method and apparatus for wind turbine braking
- Patent number 7,488,155
- Issue date Feb 10, 2009
- General Electric Company
- Corneliu Barbu
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Grant
Method for regulating a windmill, and an apparatus for the use of s...
- Patent number 7,419,356
- Issue date Sep 2, 2008
- Bonus Energy A/S
- Henrik Stiesdal
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Grant
Advanced aerodynamic control system for a high output wind turbine
- Patent number 6,940,185
- Issue date Sep 6, 2005
- Advantek LLC
- Stephen M. Andersen
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Grant
Coupled vortex vertical axis wind turbine
- Patent number 6,784,566
- Issue date Aug 31, 2004
- Robert Nason Thomas
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Grant
Rotor construction for windmill
- Patent number 5,630,705
- Issue date May 20, 1997
- Pieter A. J. Eikelenboom
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Grant
Rotor device and control for wind turbine
- Patent number 5,584,655
- Issue date Dec 17, 1996
- The Wind Turbine Company
- Kenneth J. Deering
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Grant
Aerodynamic braking device
- Patent number 5,570,859
- Issue date Nov 5, 1996
- Gene A. Quandt
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Grant
Advanced wind turbine with lift cancelling aileron for shutdown
- Patent number 5,527,152
- Issue date Jun 18, 1996
- Northern Power Systems, Inc.
- Clint Coleman
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...

Patents Applicationslast 30 patents

Information Patent Application
DEVICE AND METHOD OF CONTROLLING AN OPERATION OF A WIND TURBINE TO...
- Publication number 20230220827
- Publication date Jul 13, 2023
- Siemens Gamesa Renewable Energy A/S
- Johannes Gerhardes Wardjan Alberts
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Application
STOPPING A WIND TURBINE ROTOR USING PRE-SET PITCH RATES
- Publication number 20220403822
- Publication date Dec 22, 2022
- VESTAS WIND SYSTEMS A/S
- Keld HAMMERUM
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
METHOD OF SHUTTING DOWN A WIND TURBINE
- Publication number 20220228556
- Publication date Jul 21, 2022
- VESTAS WIND SYSTEMS A/S
- Karthik VASUDEVAN
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Application
WIND ENERGY INSTALLATION AND A METHOD OF OPERATING A WIND ENERGY IN...
- Publication number 20220003208
- Publication date Jan 6, 2022
- SIEMENS GAMESA RENEWABLE ENERGY SERVICE GMBH
- Oliver Hör
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
WIND ENERGY INSTALLATION AND A METHOD OF OPERATING A WIND ENERGY IN...
- Publication number 20220003209
- Publication date Jan 6, 2022
- SIEMENS GAMESA RENEWABLE ENERGY SERVICE GMBH
- Oliver Hör
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
WIND TURBINE DRIVE CONTROL DEVICE, WIND TURBINE POWER SUPPLY DEVICE...
- Publication number 20210199089
- Publication date Jul 1, 2021
- Nabtesco Corporation
- Haruo KODAMA
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Application
IMPROVEMENTS RELATING TO WIND TURBINES HAVING BLADES EQUIPPED WITH...
- Publication number 20190285051
- Publication date Sep 19, 2019
- VESTAS WIND SYSTEMS A/S
- Jesper Sandberg THOMSEN
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Application
METHOD AND DEVICE FOR CONTROLLING FLOATING BODY WIND TURBINE POWER...
- Publication number 20180291875
- Publication date Oct 11, 2018
- MHI VESTAS OFFSHORE WIND A/S
- Tsuyoshi WAKASA
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Application
MULTI-FUNCTIONAL FLAP USED AS A BACK-FLOW FLAP
- Publication number 20180171975
- Publication date Jun 21, 2018
- Dieter Röhm
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Application
Wind Turbine Air Deflector System Control
- Publication number 20160076516
- Publication date Mar 17, 2016
- FRONTIER WIND, LLC
- Jeffrey A. Butterworth
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Application
METHOD AND DEVICE FOR CONTROLLING FLOATING BODY WIND TURBINE POWER...
- Publication number 20150330362
- Publication date Nov 19, 2015
- MHI VESTAS OFFSHORE WIND A/S
- Tsuyoshi WAKASA
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Application
CENTRIFUGALLY DRIVEN AERODYNAMIC ROTOR BLADE BRAKE ASSEMBLY
- Publication number 20150030447
- Publication date Jan 29, 2015
- DEKA Products Limited Partnership
- Dean Kamen
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Application
WIND TURBINE ROTOR BLADE HAVING A SPOILER
- Publication number 20150010400
- Publication date Jan 8, 2015
- Alexander William Vossler
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Application
ELECTRIC MOTOR CLAMPING SYSTEM
- Publication number 20140152201
- Publication date Jun 5, 2014
- MOOG INC.
- Michael H. Shriver
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Application
DEVICE AND METHOD FOR CONTROLLING ROTATION SPEED OF A VERTICAL AXIS...
- Publication number 20130078092
- Publication date Mar 28, 2013
- Cheng-Keng CHEN
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Application
MAGNETIC ACTIVE FLAP
- Publication number 20130028734
- Publication date Jan 31, 2013
- LM GLASFIBER A/S
- Peter GRABAU
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
Wind Turbine Blade Tip Brake Apparatus and Method
- Publication number 20120282094
- Publication date Nov 8, 2012
- Paul L. Gay
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
Wind Turbine With Deployable Air Deflectors
- Publication number 20120263601
- Publication date Oct 18, 2012
- FRONTIER WIND, LLC
- Jonathon P. Baker
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
WIND TURBINE ROTOR BLADE WITH FAIL-SAFE AIR BRAKE FLAPS
- Publication number 20120134814
- Publication date May 31, 2012
- GENERAL ELECTRIC COMPANY
- Edward Lee McGrath
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
METHOD FOR SHUT DOWN OF A WIND TURBINE HAVING ROTOR BLADES WITH FAI...
- Publication number 20120134803
- Publication date May 31, 2012
- GENERAL ELECTRIC COMPANY
- Edward Lee McGrath
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
LOAD MITIGATION DEVICE FOR WIND TURBINE BLADES
- Publication number 20120063896
- Publication date Mar 15, 2012
- John M. Obrecht
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
WIND TURBINE WITH CONTROL SYSTEM
- Publication number 20110255969
- Publication date Oct 20, 2011
- XEMC, XIANGTAN ELECTRIC MANUFACTURING GROUP CORPORATION LTD.
- Jonas Hallstrom
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
ACTUATABLE SURFACE FEATURES FOR WIND TURBINE ROTOR BLADES
- Publication number 20110223022
- Publication date Sep 15, 2011
- GENERAL ELECTRIC COMPANY
- Jing Wang
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
OVERSPEED PROTECTION SYSTEM AND METHOD
- Publication number 20110142634
- Publication date Jun 16, 2011
- Detlef Menke
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
ACTIVE FLOW CONTROL DEVICE AND METHOD FOR AFFECTING A FLUID BOUNDAR...
- Publication number 20110110777
- Publication date May 12, 2011
- Vestas Wind Systems A/S
- Imad Abdallah
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
CONTROL DEVICE AND METHOD FOR AN AERODYNAMIC BRAKE OF A WIND ENERGY...
- Publication number 20110002772
- Publication date Jan 6, 2011
- Claus Colling
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
CENTRIFUGALLY DRIVEN AERODYNAMIC ROTOR BLADE BRAKE ASSEMBLY
- Publication number 20100296935
- Publication date Nov 25, 2010
- DEKA Products Limited Partnership
- Dean Kamen
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
Wind Turbine Blade And Method For Controlling The Load On A Blade
- Publication number 20100215493
- Publication date Aug 26, 2010
- Imad Abdallah
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
BLADE FOR A ROTOR OF A WIND TURBINE PROVIDED WITH BARRIER GENERATIN...
- Publication number 20100209258
- Publication date Aug 19, 2010
- LM GLASFIBER A/S
- Peter Fuglsang
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
VERTICAL AXIS WINDMILL
- Publication number 20100021300
- Publication date Jan 28, 2010
- Tsuneo Noguchi
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...

with aerodynamic drag devices on the blades

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Method of shutting down a wind turbine

Stopping a wind turbine rotor using pre-set pitch rates

Relating to wind turbines having blades equipped with boundary laye...

Wind turbine with deployable air deflectors

Method and device for controlling floating body wind turbine power...

Wind turbine air deflector system control

Method and device for controlling floating body wind turbine power...

Flow deflection device of a wind turbine

Wind turbine blade

Rotatable aerodynamic surface features for wind turbine rotor blades

Electric motor clamping system

Centrifugally driven aerodynamic rotor blade brake assembly

Wind turbine rotor blade having a spoiler

Wind turbine with control system

Control device and method for an aerodynamic brake of a wind energy...

Centrifugally driven aerodynamic rotor blade brake assembly

Method for shut down of a wind turbine having rotor blades with fai...

Wind turbine blade tip brake apparatus and method

Load mitigation device for wind turbine blades

Wind turbine with deployable air deflectors

Wind turbine blade with deflectable flaps

Power generating system including modular wind turbine-generator as...

Method and apparatus for wind turbine braking

Method for regulating a windmill, and an apparatus for the use of s...

Advanced aerodynamic control system for a high output wind turbine

Coupled vortex vertical axis wind turbine

Rotor construction for windmill

Rotor device and control for wind turbine

Aerodynamic braking device

Advanced wind turbine with lift cancelling aileron for shutdown

Patents Applicationslast 30 patents

DEVICE AND METHOD OF CONTROLLING AN OPERATION OF A WIND TURBINE TO...

STOPPING A WIND TURBINE ROTOR USING PRE-SET PITCH RATES

METHOD OF SHUTTING DOWN A WIND TURBINE

WIND ENERGY INSTALLATION AND A METHOD OF OPERATING A WIND ENERGY IN...

WIND ENERGY INSTALLATION AND A METHOD OF OPERATING A WIND ENERGY IN...

WIND TURBINE DRIVE CONTROL DEVICE, WIND TURBINE POWER SUPPLY DEVICE...

IMPROVEMENTS RELATING TO WIND TURBINES HAVING BLADES EQUIPPED WITH...

METHOD AND DEVICE FOR CONTROLLING FLOATING BODY WIND TURBINE POWER...

MULTI-FUNCTIONAL FLAP USED AS A BACK-FLOW FLAP

Wind Turbine Air Deflector System Control

METHOD AND DEVICE FOR CONTROLLING FLOATING BODY WIND TURBINE POWER...

CENTRIFUGALLY DRIVEN AERODYNAMIC ROTOR BLADE BRAKE ASSEMBLY

WIND TURBINE ROTOR BLADE HAVING A SPOILER

ELECTRIC MOTOR CLAMPING SYSTEM

DEVICE AND METHOD FOR CONTROLLING ROTATION SPEED OF A VERTICAL AXIS...

MAGNETIC ACTIVE FLAP

Wind Turbine Blade Tip Brake Apparatus and Method

Wind Turbine With Deployable Air Deflectors

WIND TURBINE ROTOR BLADE WITH FAIL-SAFE AIR BRAKE FLAPS

METHOD FOR SHUT DOWN OF A WIND TURBINE HAVING ROTOR BLADES WITH FAI...

LOAD MITIGATION DEVICE FOR WIND TURBINE BLADES

WIND TURBINE WITH CONTROL SYSTEM

ACTUATABLE SURFACE FEATURES FOR WIND TURBINE ROTOR BLADES

OVERSPEED PROTECTION SYSTEM AND METHOD

ACTIVE FLOW CONTROL DEVICE AND METHOD FOR AFFECTING A FLUID BOUNDAR...

CONTROL DEVICE AND METHOD FOR AN AERODYNAMIC BRAKE OF A WIND ENERGY...

CENTRIFUGALLY DRIVEN AERODYNAMIC ROTOR BLADE BRAKE ASSEMBLY

Wind Turbine Blade And Method For Controlling The Load On A Blade

BLADE FOR A ROTOR OF A WIND TURBINE PROVIDED WITH BARRIER GENERATIN...

VERTICAL AXIS WINDMILL