Kite control patents Explore:

 

Home

See working file also:     111    222   333  etc. several files

Kite control patents 
(this page may take a minute to load until we split to date-group pages)
We like to find and post the "Filed" date as well as the "Issued" date.

Spelling errors in titles will be corrected soon.    Working file. More soon.
May 18, 2010.     
 
This file does not robustly reveal the avionics and programming that may be important in some kite-control systems.  
 Click the image to obtain the full teaching. AWE matters are embedded in the various instructions.    Commentary is invited by those with an AWE eye.                 Notes@EnergyKiteSystems.net  
   

Application number: 12/154,685
Publication number: US 2009/0289148 A1
Filed: May 23, 2008

 
 
US Pat.: 4180221
Filed: Jan 16, 1978
Issued: Dec 25, 1979
 
Abstract   [Reverse camber of airfoil]
Air foil with reversible camber
 William W. Orrison

US Pat.: 3327436
Filed: Sep 3, 1964
Issued: Jun 1967
 

 

 
AbstractMethod for retrieving a fixed-wing aircraft without a runway Brian T. McGeer et al

US Pat.: 6264140
Filed: Oct 25, 1999
Issued: Jul 24, 2001

 
US Pat.: 1265797
Filed: Jul 25, 1917
Issued: May 1918
 

 

 
US Pat.: 4513932
Filed: Jun 30, 1983
Issued: Apr 30, 1985
 

› 

 

 

TROLLING UNDERWATER PISHING KITE
Clissolde L. Louthan
US Pat.
: 3613290
Filed: Feb 24, 1970
Issued: Oct 1971
 
 
US Pat.: 4813637
Filed
: Mar 9, 1983
Issued: Mar 21, 1989
 
AbstractUS Pat.: 3997136
Filed: Jan 2, 1975
Issued: Dec 14, 1976

 
 

Mechanism for releasing a toy parachute from a kite string
Hubert M. Howard
US Pat.: 4042195
Filed: Aug 2, 1976
Issued: Aug 16, 1977

 
AbstractMethod for making a miniature kite
Ricardo Pascual
Patent number: 6517474
Filing date: Aug 13, 2001
Issue date: Feb 11, 2003
 
Tetrahedral kite and method of making same
Floyd M. Robey
Patent number: 2744701
Filing date: Jan 29, 1953
Issue date: May 1956
 
AbstractMultiple feather kite
R. Jed Katzman

Application number: 11/603,429
Publication number: US 2007/0120018 A1
Filing date: Nov 22, 2006

 

 
AbstractArm mounted safety cutting tool  
Brian D Wichner

Application number: 10/529,034
Publication number: US 2006/0060040 A1
Filing date: Sep 22, 2003

 
Device for searching for submarine mines, Etc.
Ulrik Severin Sjostrand, of Sundbyberg, Sweden
Patent number: 818479
Filing date: Sep 28, 1905
Issue date: Apr 1906
 
Aero drop for use with kites and other objects
William A. Fricke
Patent number: 3088701
Filing date: Aug 15, 1960
Issue date: May 1963
 
Kite and similar aerial machine
Charles Lakeman Tweedale,
of Weston, Near Otley, England
Patent number: 992086
Filing date: Oct 30, 1909
Issue date: May 1911
 
AbstractSolar power station
 Joachim Wenzel

Patent number: 4361295
Filing date: Jan 15, 1980
Issue date: Nov 30, 1982

 


Wind system for converting energy through a vertical-axis turbine actuated by means of kites and process for producing electric energy through such system.
Massimo Ippolito of Berzano di San Pietro, Italy; and Franco Taddei of Sirtori, Italy.
Application number: 12/307,421
Publication number: US 2010/0013225 A1
Filing date: Jun 13, 2007
 
AbstractFluid-medium vehicle
Albert Granville Fonda
Application number: 9/944,959
Publication number: US 2003/0024453 A1
Filing date: Jun 20, 2001

 
 
AbstractRein-deer kite and its control systems
US Pat. 5435259 - Filed Jul 27, 1993
•_, r -j kites, having a half octagonal peripheral frame, ... 7 illustrates how
to construct a new design for winds working at ease, see FIG. ...
Patent number: 5435259
Filing date: Jul 27, 1993
Issue date: Jul 25, 1995
 
JAMES
US Pat. 493826 -
... b, to the towing line L. These kites are preferably in the form of a pointed
... from which by means of the arm G' any mechanism for working an alarm, ...
 
[APPLICATION] Method and apparatus for operating and controlling airborne wind energy ...
US Pat. 12459017 - Filed Jun 25, 2009
Due to the large forces working on the craft 100 a massive amount of ... [0055]
An additional point worth considering is as the size of the kites are so ...
 
JALBERT
US Pat. 2398744 - Filed Aug 31, 1945
They have flown exclusively as kites in winds of one-and-a-half to two miles ...
and having spring- , pressed means working externally of the envelope . to ...
 
LIFE SAVING
US Pat. 881417 - Filed Jun 15, 1907 -
... or the -like, and has for its object the use of aeroplanes, kites, or the
like, ... shore assistance is not essential to the working of the appliance.
 
WIND-DRIVEN NOISE-MAKING DEVICES
US Pat. 3283441 - Filed Sep 5, 1963 -
Lugs and extend from art, proved unsatisfactory for use on kites and on ... and
the braking of the propeller and thus assure smooth working of the device. ...
 
APPLICATION] ATMOSPHERIC RESOURCES EXPLORER
US Pat. 12302435 - Filed May 31, 2007 - Omnidea, LDA.
... a cycle in which the positive working phase (aircraft traveling upwards and
... uses tethered lighter-than-air airfoil kites and transmits these forces, ...
 
Wind operated sliding sail toy
US Pat. 5803784 - Filed Apr 1, 1996
Flying toys attached 20 to strings, such as kites, have been used and enjoyed
... and smooth working flying toy is provided capable of being wind driven in
 
Layered lattice-matched superconducting device and method of making
US Pat. 5087605 - Filed Jun 1, 1989 - Bell Communications Research, Inc.
... anticipated that these high Tc materials would be used in working electronic
devices. ... kites have not offered such simple material combina- 55 tions. ...
 
Helicoidal structures, useful as wind turbines
US Pat. 4708592 - Filed Oct 28, 1986 - Wind Production Company
... and in conjunction with kites, either incorporated into the tail of the kite
or ... into a volume which is very small compared to its working volume. ...
 
Sail slidable on guide lines
US Pat. 5259804 - Filed Jul 29, 1992
... in both attached to strings such as kites have been used and directions, ...
A han- speed, and smooth working flying toy capable of being 55 die 26 is ...
 

Captive helicopter - kite means
Arthur M. Young
Patent number: 2429502
Filed Aug 21, 1943
Issued: Oct 1947

 
 
Abstract

Tethered aircraft system for gathering energy from wind

 Howard G. Carpenter

Patent number: 6254034
Filing date: Sep 20, 1999
Issue date: Jul 3, 2001

 
PROJECTILE KITE
US Pat. 3279726 - Filed Jan 21, 1966 -
A spring S3 provides energy to catapult the kite into the air when trigger catch
54 is 30 released by pulling launch cable 55 which passes over pulley 56 to
 
Self-erecting windmill
US Pat. 3987987 - Filed Jan 28, 1975
Balanced against these advantages are I0 bles are approached, the air speed of
the kite can be the waste of energy in maintaining the self-erecting ...
 
[APPLICATION] Watercraft Having a Kite-Like Element
US Pat. 11662022 - Filed Sep 5, 2005
Storage of the power which is generated in the kite-like element is essential
because this makes it possible to bridge periods in which the energy yield is
 
Traction control system
US Pat. 7234730 - Filed Nov 23, 2005 - Marctec, LLC
Forward kite 2350 is hydrodynamic flow characteristics using an energy beam ...
The aft sonic energy, or may comprise electromagnetic energy such kite can ...
 
[APPLICATION] Wind energy production using kites and ground mounted power generators
US Pat. 10656004 - Filed Sep 3, 2003
A force is generated on the body of the kite, and transmitted to a spool
connected to a generator shaft through a cable. As the wind pushes the kite,
energy ...
 
AbstractBalloon trajectory control system
Kim Maynard Aaron

Patent number: 6402090
Filing date: Jun 29, 1998
Issue date: Jun 11, 2002
 

 
Elevated sailing apparatus
Malcolm Phillips
 
 
Simplified elevated sailing apparatus
Malcolm Phillips
 
 
Aerial advertising device

Luis Azarraga

Patent number: 1652997
Filing date: Dec 21, 1926
Issue date: Dec 1927

 
Inventor: P. F. GIRARD
Assignee: The Ryan Aeronautical Co

Patent number: 3135482
Filing date: Dec 26, 1962
Issue date: Jun 1964

 
Patent number: 4744534
Filing date: Feb 5, 1986
Issue date: May 17, 1988
 
OCKELS; Wubbo Johannes; (Amsterdam, NL) ; Ruiterkamp; Richard; (Den Haag, NL) ; Lansdorp; Bas; (Delft, NL).          Application

Abstract    20080210826 <==click for full instruciton

A kite having a main body provided with at least a first and a second connection cable and at least one main pulling cable, the at least first and second connection cables each having a first and a second end, the first ends of the at least first and second connection cables being connected to the main body of the kite at different positions of the main body, the second ends of the at least first and second connection cables being connected to the main pulling cable, wherein at least one regulator is provided between the first ends of the connection cables and the main body and/or between the second ends of the connection cables and the at least one main pulling cable, a control being provided for controlling the at least one regulator so that the kite is steereable. The invention further relates to a method of generating power using such a kite, a method of providing driving force to a vehicle using such a kite, a vehicle provided with such a kite and a power generation assembly comprising such a kite.

  Kite, method of generating power using such a kite, method of providing driving force to a vehicle using such a kite, and power generation assembly comprising such a kite.

 

 
SYSTEM AND METHOD FOR HARNESSING WIND POWER AT VARIABLE ALTITUDES Craig Varrichio et al

Application number: 12/188,867
Publication number: US 2010/0032956 A1
Filing date: Aug 8, 2008
 

 

Axial-mode linear wind-turbine

 Gary Dean RagnerAbstract

Application number: 9/941,337
Publication number: US 2002/0040948 A1
Filing date: Aug 29, 2001
Issued patent6523781 (Issue date Feb 25, 2003)

 

AbstractATMOSPHERIC
RESOURCES
EXPLORER

 Tiago Da Costa Duarte Pardal et al

Application number: 12/302,435
Publication number: US 2009/0278353 A1
Filing date: May 31, 2007

 
   
Toy Kite 
Patent number: 2349417
Filing date: May 2, 1942
Issue date: May 1944
 

Overview
Abstract
› Drawing
Description
Claims
 

 
 
   
   
Drawing       Aeroplane

Silas J. Conyne, of Chicago, Illinois
US Pat. 698634
Filed: July 15, 1901
Issued April 29, 1902

 
Drawing
Aerial Vehicle or other structure
Alexander Graham Bell, of Washington, D.C. 
Filed: June 1, 1903.
Issued: Sep. 20, 1904
 
Drawing

Kite

Ferdinand Lischtiak, of Liesing, near Vienna, Austra-Hungary

Assignor to Joseph F. Heurteur, of Paterson, New Jersy.

Patent number: 743301
Filing date: Jul 30, 1903
Issue date: Nov 1903

 

Drawing
Aerial Vehicle
US Pat. 757012
Filed June 1, 1903
Issued April 12, 1904

Alexander Graham Bell

 
   
   
   
   
MAHONY

 
   
FRANK ERNEST JACKSON, of Minas de Rio Tinto, Spain
US Pat 919436
Kite
Filed: August 23, 1907
Issued: April 27, 1909

 

 
   
   
   
Amusement Device

 
   
Drawing
Kite
John C. Ayling, of Springfield, Illinois

US Pat. 1009274
Filed January 24, 1911
Issued November 21, 1911

 
Drawing
Kite
Otto Seydel, of New York, N.Y.

US Pat. 1016180
Filed January 13, 1911
Issued January 30, 1912

 
   
   

 
   
SAFETY DEVICE FOR AERIAL SIGNS

 
 
METHOD AND APPARATUS FOR CARGO
Assignee: r to A
 
 
   
AERIAL FENCE

 

 
   
   
CAPTIVE HELICOPTER-KITE MEANS

 

 
MARTIN

 
 
TOY AIRCRAFT
Assignee: f fifty per cent to Lane Rhodes

 

 
ROTARY WING AIRCRAFT

 

 
WILLIAMS

 

 
FIELDS

 

 
AIRCRAFT LAUNCHING APPARATUS

 

 
AUTOMATIC REEL FOR CONTROLLING

 

 
AUTOMATIC REEL FOR CONTROLLING

 

 
LANG F

 
 
GEORGE D. Wanner

 
 
   
BROWN

 

 
PARA-KITE ATTACHMENT

 
CONTROL FOB FLYING MODEL AIRPLANES

 

 
   
  Flexible Kite

William M. Allison

of Dayton, Ohio

Filed: September 8, 1950    
Issued: March 6, 1956

Comment:
* This single-lobe kite often uses spines. Consider stiff Mylar plastic that would substitute for the the fore-aft rods.
* This precedes Frank Scott's  "Scott Sled". Fun story.

 
TETHERED TOY AIRPLANE CONTROL

 
   
BAYUK

 

 
COTTON
Assignee: by mesne assign

 

 


 



    ~~Otto Lilienthal

 
   
   
DrawingPlastic covered nonrigid winged box kited

Wilbur E. Green, of Houston, Texas
US Pat. 2693330
Filed November 17, 1952

Issued November 2, 1954
 

 
Wilbur Green, of Houston Texas
Kite
 
 
HOWARD

 

 
CARPENTER

 

 
FRIEDMAN

 

 
BOYCE

 

 
BENSEN

 

 
MILLS

 
 
   
MAYNE

 

 
HUIE KITE F

 
 
   
GROUND BASED COMPONENTS
Assignee: the United States of America as represented by the

 

 
PETTIT

 

 
CONTROL DEVICE FOR MODEL AIRPLANES

 

 
CONTROL HANDLE MEANS FOR POWERED

 

 
TAYLOR

 

 
SYSTEM FOR EXTENDING THE RANGE OP A SEARCH RADAR
Assignee: the United States of America as represented by the Secre

 

 
KENDALL
Assignee: Kamau Aircraft Corporation
 
 
SMITH

 

 
CRAWFORD

 

 
SANBORN

 

 
CAPTIVE ROTARY WING AIRCRAFT AND CONTROL SYSTEM

 
 
ACROBATIC KITE

 
CAPTIVE ROTARY WING AIRCRAFT AND CONTROL SYSTEM

 

 
DELL ARIA ETAL SHIP SIMULATOR

 
 
JENCE
Assignee: U

 

 
BARBER

 
MCCLAIN

 
KITE CONTROL

 

 
SELF-POWERED MODEL PARAGLIDER

 

 
   
Controllable parachutes
by Curtis W. Hughes,
Loy B. Brydon, of North Carolina. Assignors: Capital Parachuting Enterprises, Fayetteville, N.C.  
US Pat. 3228635  
Filed: April 24, 1963.
Issued:  Jan. 11, 1966.
 
FIG.IZ F. V. CUNNINGHAM KITES

 

 
HULL ETAL REMOTE CONTROL DEVICES

 
TUG AIRCRAFT COMBINATION S

 

 
   
   
TETHERED AIRBORNE OBSERVATION DEVICE

 
 
Kites  U.S. Pat 335984 
Raymond Prunty Holland, Jr.,
of Roswell, New Mexico.
Filed: April 1, 1965.
Issued: August 1967.    

He instructs a simplification of types taught in U.S. Patents 2562789 and 2698724. He has a focus on simplified bridle and absence of trailing tail.  He sets out a tall order:

HOLLAND, JR

 

 
   
   
KITE REEL

 
   
   
FIG. A. E. HARTIG KITE
3347500
Filed: June 30, 1966
Issued: October 17, 1967

 

 
KINSEY KITE CONTROL ASSEMBLY

 
KITE CONTROL APPARATUS

 
FIGURE

 
COMBINATION KITE CONTROL STICK AND WINDER

 
KITE FLIGHT CONTROL DEVICE

 
Drawing
Centroidally supported modular tetrahedron structure
William L. Cureton
Filed Jan. 24, 1968
Issued Feb. 10, 1970
 
 
   
   
Julius M. Christoffel
and Lester F. Phillips.    Assignors to Gayla Industries, Inc., of Houston, Texas.
Kite
US Pat.  3534932
Filed June 10, 1968
Issued: Oct. 20, 1970
 
KITE CONTROL DEVICE

 
TWO STRING KITE AND CONTROL THEREFOR
 
VANES FOR HIGH SPEED TOW CABLE
Assignee: ax O

Filed in 1969
Issued in 1970

 
KITE CONTROL

 

 
   
   
AERIAL LOGGING SYSTEM
Assignee: Bohemia Lumber Company

 

 
   
   
GLIDER LAUNCHER FOR KITES

 
 
   
   
KITE ASSEMBLY

 
BARRIER FOR CONTROL OF SUBSTANCES IN BODIES OF WATER

 

 
KITES

 
 
REMOTE CONTROL SYSTEM FOR KITES AND THE LIKE

 
   
   
FIG.IO

 

 
   
Self-erecting windmill

 

 
Kite with a diverging wing struts with a center strut and a ...

 
 
Maneuverable glider kite

Helen Bushell, of North Kew, Victoria, Australia
Filed: April 1, 1976
Issued: Aug. 1, 1978

 

 
Kite construction

 

 
   
   
Wind driven apparatus for power generation

 

 
Kite strut connector
US Pat. 4277040    
Julius M. Christoffel
Assignee: Damon Corporation
 
Kite-flying control reel

 
Maneuverable, inflatable kite

 
Kite reel system

 
Acrobatic rotary kite
Assignee: Harold E. Schneider, Sigma Engineering Company, Inc., Gary Wood
 
Kite control mechanism

 
   
Abstract Flying object

 

 
   
AbstractFlying object

Toshiji Takami; Toshio Ito; Fusako Kuwaguchi, all of Amagasaki, Japan

Assignee: Mitsubishi Denki,Kabushiki Kaisha, Japan
Filed: Dec. 4, 1980
Issued: March 22, 1983

 
Laterally and vertically controllable underwater towed vehicle

 

 
Integrated faired towline with integral locking feature
Assignee: The United States of America as represented by the Secretary of the Navy

 

 
Controllable kite

 
Lighter than air wind energy conversion system utilizing a ...

 

 
Wind generator kite system

 
Apparatus for controlling and storing a kite
Assignee: Team Winsor
 
Lighter than air wind energy conversion system utilizing a ...

 

 
   
   
Keel guided acrobatic kite and control apparatus therefor
Assignee: Gayla Industries, Inc.
 
   
Hot air balloon kite

 

 
Fluttering kite

Toshio Ito; Akemi Futakawa; Osamu Nakazaki
Assignee: Mitsubishi Denki Kabushiki Kaisha

 

 
   
High-speed faired towline
Assignee: The United States of America as represented by the Secretary of the Navy

Filed: Jan. 28, 1985
Issued: Ap 7, 1987

 
Lifting aerial load suspending device
Filed: May 27, 1986
Issued: June 7, 1988
 
 
   
Flexible tethered wind turbine

 
 
Line weight or cleat

 

 
Kite bridle and method
Assignee: Llumar Star Kites, Inc.
 
Combination kite control and reel device

 
Handheld electronic kite control

 
Dual reel string winding and unwinding apparatus for use with ...

 
Highly maneuverable control line kite

 
Lightning hardened tether cable and an aerostat tethered to a ...
Assignee: Westinghouse Electric Corp.

 

 
   
   
Steerable kite

 
Air baffle for stunt kite and stunt kite

 
Method and system for flying kites

 
Control apparatus for quad-line stunt kites

 
Stunt kite bridle

 
   
   
Spring-loaded flexible kite strap handle and line caddy
Assignee: Brent O. Onstott

 

 
Hand-held line reel with brake

 
Framed airfoil kite

 
Quad-line kite

 
Dual-line or quad-line controlled kite

 
   
   
Method for locating the resultant of wind effects on tethered ...

 

 
Controlled ram-air inflated kite with X-braced bridle and ...

 
Captive guided kit

 
   
Adjustable strap for a kite line

 

 
Airship tail fin construction for improved control

 

 
Multi-rotor kite glider

 
Scavenger energy converter system its new applications and ...

 
   
 
   
   
Self-erecting collapsible kite

 
Tethered aircraft system for gathering energy from wind

 

 
Transformable gun launched aero vehicle
Assignee: Science Applications International Corporation

 

 
   
   
Kite tether control with attachment to the body

 
Kite control and quick release system

 
Body hull for body hulling

 
Electrical energy depletion/collection system
Assignee: Harnessing Energy/Storm Reduction, Inc.
 
 
   
Ram air inflated wing

 

 
Kite line reeler and controller

 
Releasable control yoke anchor system for kite

 
Axial-mode linear wind-turbine

 
Kite control systems

 
   
Axial-mode linear wind-turbine

 
 
Kiting system on a sitting board

 

 
Cable reel

 
Control line assembly for kites

 
Multipurpose airfoil assembly

 
Kite having flapping wings
Assignee: Gayla Industries
 
 
   
Traction kite design
Assignee: Peter Lynn Limited

 

 
Integrated kite control bar and controlled tension release ...
Assignee: Ocean Rodeo Sports Inc.
 
   
   
   
   
   
Parrot kite
Don Tabor of Imperial Beach, California
Filed: Sep. 9, 2010

Issued: July 13, 2004

 

 
   
   
   
   
Adaptable kite/airfoil

 
Kite control bar with ninety-degree handles and fail-safe ...

 
Multi-agent autonomous system
Assignee: California Institute of Technology

 

 
   
   
Traction kite harness safety release

 
Control and fixing device for the sail of a kite
Assignee: Arnaud Ballu
 
Control line system for power kites

 
   
Kite safety device

 

 
Push release loop
Assignee: Nalu Kai Incorporated

 

 
Control apparatus for kite powered conveyance device

 
Arm mounted safety cutting tool

 
Kite safety, control, and rapid depowering apparatus

 
   
   
Inflatable wing with active canopy profile control

 

 
Release device for a kite
Assignee: Neil Pryde Limited
 
Kite surfing bar

 
Wing device for sporting activities

 

 
Airborne enhancement device

 

 
   
AbstractHigh-performance riverboard system
Robert Geier, of Boise, Idaho

US Pat.  7025644 B2
Filed May 24, 2004.  Issued April 11, 2006

 
   
   
Hovering wind turbine

 
 
Trim line kite control system

 
Device and a method for steering a kite in kiteboarding

 
Automatic homing systems and other sensor systems

 

 
   
   
Bridle assembly for a kite

 
Brake for a kite
Assignee: Revolution Enterprises, Inc.
 
Aerialwind power generation system and method

 

 
   
   
   
Multifunctional winch drum drive system
Assignee: Growth Innovation, LLC
 
Automatic release attachment for kites and the like, and ...
Assignee: Michael
 
Method and apparatus for aerial deployment of waterfowl decoys

 
Force Balancing Kite Control System

 
Force balancing kite control system

 
Wind drive apparatus for an aerial wind power generation system

 

 

 
AERIAL WIND POWER GENERATION SYSTEM AND METHOD

 

 
ATMOSPHERIC RESOURCES EXPLORER
Assignee: Omnidea, LDA.

 

 
SYSTEM FOR RELEASING OPPOSING TENSIONED LINES
Assignee: HO SPORTS COMPANY, INC.
 
Center-routed kite safety device

 
Control handle for use with a towable airfoil
Assignee: Ho Sports Company
 
Spreader bar lateral kite control
Assignee: SIDEWINDER GEAR LLC
 
SYSTEMS AND METHODS FOR TETHERED WIND TURBINES

 

 
AIRBORNE POWER STATION

 

 
AIRBORNE POWER STATION

 

 
Power generation system including multiple motors/generators
Assignee: Baseload Energy, Inc.

 

 
Atmospheric electrical generator

 

 
Systems and methods for tethered wind turbines
Assignee: Magenn Power, Inc.

 

 
Airborne wind turbine electricity generating system
 Moshe Meller

AIRBORNE STABILIZED WIND TURBINES SYSTEM

 

 
   
TRACTION KITE WITH DEFORMABLE LEADING EDGE

 

 
Automatic release attachment for kites and the like, and ...
Assignee: Michael W. Kirnak
 
 
TETHER HANDLING FOR AIRBORNE ELECTRICITY GENERATORS
Assignee: Baseload Energy,Inc.
 
 
Tethered Autonomous Air Vehicle With Wind Turbines
Assignee: HONEYWELL INTERNATIONAL INC.
 
 

JoeBen Bevirt
Method and apparatus for operating and controlling airborne

 
Atmospheric electrical generator with change of state

 
 
Apparatus for generating power using jet stream wind power

 
 
7097137Launch and recovery system for unmanned aerial vehicles