CA940513A - Variable length blade - Google Patents

Variable length blade

Info

Publication number
CA940513A
CA940513A CA091,709A CA91709A CA940513A CA 940513 A CA940513 A CA 940513A CA 91709 A CA91709 A CA 91709A CA 940513 A CA940513 A CA 940513A
Authority
CA
Canada
Prior art keywords
variable length
length blade
blade
variable
length
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA091,709A
Other versions
CA91709S (en
Inventor
Evan A. Fradenburgh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Raytheon Technologies Corp
Original Assignee
United Aircraft Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by United Aircraft Corp filed Critical United Aircraft Corp
Application granted granted Critical
Publication of CA940513A publication Critical patent/CA940513A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/022—Adjusting aerodynamic properties of the blades
    • F03D7/0236—Adjusting aerodynamic properties of the blades by changing the active surface of the wind engaging parts, e.g. reefing or furling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
    • B64C11/003—Variable-diameter propellers; Mechanisms therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/32—Rotors
    • B64C27/46—Blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/20—Rotors
    • F05B2240/202—Rotors with adjustable area of intercepted fluid
    • F05B2240/2021—Rotors with adjustable area of intercepted fluid by means of telescoping blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/20—Rotors
    • F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05B2240/31—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor of changeable form or shape
    • F05B2240/313—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor of changeable form or shape with adjustable flow intercepting area
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
CA091,709A 1969-09-18 1970-08-27 Variable length blade Expired CA940513A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US85909469A 1969-09-18 1969-09-18

Publications (1)

Publication Number Publication Date
CA940513A true CA940513A (en) 1974-01-22

Family

ID=25330014

Family Applications (1)

Application Number Title Priority Date Filing Date
CA091,709A Expired CA940513A (en) 1969-09-18 1970-08-27 Variable length blade

Country Status (6)

Country Link
US (1) US3768923A (en)
CA (1) CA940513A (en)
DE (1) DE2045637C3 (en)
FR (1) FR2173631B1 (en)
GB (1) GB1332658A (en)
IT (1) IT954097B (en)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3884594A (en) * 1973-12-26 1975-05-20 United Aircraft Corp Variable length blade
US4007997A (en) * 1975-11-05 1977-02-15 United Technologies Corporation Rotor diameter indicator
US4074952A (en) * 1976-06-28 1978-02-21 United Technologies Corporation Locking control and overtravel safety stop system for variable length rotor blades
US4080097A (en) * 1976-06-28 1978-03-21 United Technologies Corporation Locking control and overtravel safety stop system for variable length rotor blades
ES8406336A1 (en) * 1983-09-26 1984-08-01 Pilar Banolas De Ayala M Aircraft lift rotors
NL9200786A (en) * 1992-04-29 1993-11-16 Pieter Arie Jan Eikelenboom WIKE CONSTRUCTION FOR WINDMILL.
US5253979A (en) * 1992-06-01 1993-10-19 United Technologies Corporation Variable diameter rotor having an offset twist
US5299912A (en) * 1992-07-28 1994-04-05 United Technologies Corporation Drive system for changing the diameter of a variable diameter rotor
US5655879A (en) * 1995-03-28 1997-08-12 Sikorsky Aircraft Corporation Mounting arrangement for variable diameter rotor blade assemblies
US5636969A (en) * 1995-03-28 1997-06-10 Sikorsky Aircraft Corporation Torque tube/spar assembly for variable diameter helicopter rotors
US5620304A (en) * 1995-12-11 1997-04-15 Sikorsky Aircraft Corporation Rotor system having alternating length rotor blades and positioning means therefor for reducing blade-vortex interaction (BVI) noise
US5620303A (en) * 1995-12-11 1997-04-15 Sikorsky Aircraft Corporation Rotor system having alternating length rotor blades for reducing blade-vortex interaction (BVI) noise
US5735670A (en) * 1995-12-11 1998-04-07 Sikorsky Aircraft Corporation Rotor system having alternating length rotor blades and positioning means therefor for reducing blade-vortex interaction (BVI) noise
US5642982A (en) * 1995-12-11 1997-07-01 Sikorsky Aircraft Corporation Retraction/extension mechanism for variable diameter rotors
US6019578A (en) 1998-12-18 2000-02-01 Sikorsky Aircraft Corporation Variable diameter rotor blade actuation system
US6030177A (en) 1998-12-18 2000-02-29 Sikorsky Aircraft Corporation Drive system for a variable diameter tilt rotor
US7071578B1 (en) * 2002-01-10 2006-07-04 Mitsubishi Heavy Industries, Ltd. Wind turbine provided with a controller for adjusting active annular plane area and the operating method thereof
US6972498B2 (en) * 2002-05-28 2005-12-06 General Electric Company Variable diameter wind turbine rotor blades
US7475847B2 (en) * 2002-09-09 2009-01-13 Gerbino Allen J Retractable lifting blades for aircraft
AU2003263827A1 (en) * 2003-07-29 2005-03-07 General Electric Company Variable diameter rotor
JP2005061320A (en) * 2003-08-12 2005-03-10 Kunio Miyazaki Windmill structure of wind power generation device
US8303248B2 (en) * 2005-10-05 2012-11-06 Sikorsky Aircraft Corporation Swash plate anti-torque mechanism
US8459948B2 (en) * 2008-10-24 2013-06-11 Esteban A. Caraballoso Retractable composite rotor blade assembly
US8784057B2 (en) * 2011-02-28 2014-07-22 The Boeing Company Disc rotor retraction system
US9994310B2 (en) * 2014-12-15 2018-06-12 The Boeing Company Rotor assembly apparatus
CN105292467A (en) * 2015-11-06 2016-02-03 中国航空工业经济技术研究院 Horizontal speed-raising system of rotorcraft
US10583914B2 (en) * 2016-03-23 2020-03-10 Amazon Technologies, Inc. Telescoping propeller blades for aerial vehicles
US10526070B2 (en) 2016-03-23 2020-01-07 Amazon Technologies, Inc. Aerial vehicle propulsion mechanism with coaxially aligned propellers
US10723440B2 (en) 2016-03-23 2020-07-28 Amazon Technologies, Inc. Aerial vehicle with different propeller blade configurations
US10399666B2 (en) 2016-03-23 2019-09-03 Amazon Technologies, Inc. Aerial vehicle propulsion mechanism with coaxially aligned and independently rotatable propellers
US11305874B2 (en) 2016-03-23 2022-04-19 Amazon Technologies, Inc. Aerial vehicle adaptable propeller blades
TR202022410A1 (en) * 2020-12-30 2022-07-21 Tusas Tuerk Havacilik Ve Uzay Sanayii Anonim Sirketi Rotary wing aircraft.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128829A (en) * 1964-04-14 Variable diameter propeller
GB252461A (en) * 1925-02-27 1926-05-27 Kurt Bilau Improvements in or relating to wind-driven prime movers
US2163482A (en) * 1936-01-01 1939-06-20 Cameron Peter Aircraft having rotative sustaining means
NL79056C (en) * 1950-08-18 1955-04-15
US3227399A (en) * 1963-09-16 1966-01-04 Dastoli Joseph Safety aircraft system
US3297094A (en) * 1965-10-20 1967-01-10 Boeing Co Aircraft propelling assembly

Also Published As

Publication number Publication date
FR2173631A1 (en) 1973-10-12
US3768923A (en) 1973-10-30
GB1332658A (en) 1973-10-03
FR2173631B1 (en) 1975-09-26
DE2045637C3 (en) 1980-01-03
IT954097B (en) 1973-08-30
DE2045637B2 (en) 1979-05-03
DE2045637A1 (en) 1973-10-11

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