Messages in AirborneWindEnergy group.                          AWES 25283 to 25332 Page 397 of 440.
Group: AirborneWindEnergy Message: 25283 From: dave santos Date: 3/21/2019
Subject: Rigging Plan for "Dancing"-Eight Rig

Group: AirborneWindEnergy Message: 25284 From: dave santos Date: 3/21/2019
Subject: Re: Rope-drive transmission

Group: AirborneWindEnergy Message: 25285 From: dave santos Date: 3/21/2019
Subject: More Spanish AWE Buzz

Group: AirborneWindEnergy Message: 25286 From: joe_f_90032 Date: 3/21/2019
Subject: Re: Rope-drive transmission

Group: AirborneWindEnergy Message: 25287 From: joe_f_90032 Date: 3/21/2019
Subject: Re: Rigging Plan for "Dancing"-Eight Rig

Group: AirborneWindEnergy Message: 25288 From: dave santos Date: 3/21/2019
Subject: eWindSolutions active on New Forum

Group: AirborneWindEnergy Message: 25289 From: dave santos Date: 3/21/2019
Subject: SkySails picks up Daedalus Yachts Partner for advanced kite-boat

Group: AirborneWindEnergy Message: 25290 From: dave santos Date: 3/21/2019
Subject: Energy Observer, the new world-traveling Solar-Kite-Elec-H2 super-ya

Group: AirborneWindEnergy Message: 25291 From: dave santos Date: 3/21/2019
Subject: KitePower Intends to feed Valkenburg Grid

Group: AirborneWindEnergy Message: 25292 From: dave santos Date: 3/21/2019
Subject: UMadrid Test Video

Group: AirborneWindEnergy Message: 25293 From: dave santos Date: 3/21/2019
Subject: Team Tuddelpower's latest hit video

Group: AirborneWindEnergy Message: 25294 From: dave santos Date: 3/21/2019
Subject: Yoko Tsuno- AWE SciFi Vision from 1976

Group: AirborneWindEnergy Message: 25295 From: dave santos Date: 3/22/2019
Subject: Relation of Cosine Loss to Bridle Angle, Rigger's Triangle, etc.

Group: AirborneWindEnergy Message: 25296 From: dave santos Date: 3/22/2019
Subject: KitePower's 60m2 LEI Wing

Group: AirborneWindEnergy Message: 25297 From: joe_f_90032 Date: 3/22/2019
Subject: Re: Race for Water Foundation

Group: AirborneWindEnergy Message: 25298 From: dave santos Date: 3/22/2019
Subject: Third-Party LEI to Parafoil Comparisons

Group: AirborneWindEnergy Message: 25299 From: joe_f_90032 Date: 3/22/2019
Subject: Re: Energy Observer, the new world-traveling Solar-Kite-Elec-H2 supe

Group: AirborneWindEnergy Message: 25300 From: joe_f_90032 Date: 3/22/2019
Subject: Re: Team Tuddelpower's latest hit video

Group: AirborneWindEnergy Message: 25301 From: joe_f_90032 Date: 3/22/2019
Subject: Re: Team Tuddelpower's latest hit video

Group: AirborneWindEnergy Message: 25302 From: Joe Faust Date: 3/22/2019
Subject: Richard Leloup

Group: AirborneWindEnergy Message: 25303 From: Joe Faust Date: 3/22/2019
Subject: Roger Leloup

Group: AirborneWindEnergy Message: 25304 From: Joe Faust Date: 3/22/2019
Subject: Re: Roger Leloup

Group: AirborneWindEnergy Message: 25305 From: Joe Faust Date: 3/22/2019
Subject: Re: Roger Leloup

Group: AirborneWindEnergy Message: 25306 From: dave santos Date: 3/22/2019
Subject: Re: Energy Observer, the new world-traveling Solar-Kite-Elec-H2 supe

Group: AirborneWindEnergy Message: 25307 From: dave santos Date: 3/22/2019
Subject: Re: Energy Observer, the new world-traveling Solar-Kite-Elec-H2 supe

Group: AirborneWindEnergy Message: 25308 From: dave santos Date: 3/22/2019
Subject: Re: Roger Leloup

Group: AirborneWindEnergy Message: 25309 From: joe_f_90032 Date: 3/22/2019
Subject: Re: Roger Leloup

Group: AirborneWindEnergy Message: 25310 From: Joe Faust Date: 3/22/2019
Subject: KitePower jobs, jobs, jobs

Group: AirborneWindEnergy Message: 25311 From: dave santos Date: 3/22/2019
Subject: Re: KitePower jobs, jobs, jobs

Group: AirborneWindEnergy Message: 25312 From: dave santos Date: 3/22/2019
Subject: KiteSailing Discussion on Sailing Anarchy Forum

Group: AirborneWindEnergy Message: 25313 From: benhaiemp Date: 3/22/2019
Subject: Re: KitePower's 60m2 LEI Wing

Group: AirborneWindEnergy Message: 25314 From: dave santos Date: 3/22/2019
Subject: Re: KitePower's 60m2 LEI Wing

Group: AirborneWindEnergy Message: 25315 From: dave santos Date: 3/23/2019
Subject: Re: Rope-drive transmission

Group: AirborneWindEnergy Message: 25316 From: dave santos Date: 3/23/2019
Subject: Advancing Atmospheric Gravity Wave Science

Group: AirborneWindEnergy Message: 25317 From: joe_f_90032 Date: 3/23/2019
Subject: Richard Leloup

Group: AirborneWindEnergy Message: 25318 From: dave santos Date: 3/23/2019
Subject: Re: Richard Leloup

Group: AirborneWindEnergy Message: 25319 From: dave santos Date: 3/23/2019
Subject: Re: Rope-drive transmission

Group: AirborneWindEnergy Message: 25320 From: dave santos Date: 3/23/2019
Subject: RC Aerotowing- New Tethered Aviation Specialty

Group: AirborneWindEnergy Message: 25321 From: dave santos Date: 3/23/2019
Subject: Re: RC Aerotowing- New Tethered Aviation Specialty

Group: AirborneWindEnergy Message: 25322 From: dave santos Date: 3/24/2019
Subject: COTS C-Kites, Turn-rate, and AirSpace Efficiency

Group: AirborneWindEnergy Message: 25323 From: dave santos Date: 3/24/2019
Subject: Crosswind Load-Motion Turn-Rate

Group: AirborneWindEnergy Message: 25324 From: dave santos Date: 3/24/2019
Subject: Ice kiting at ~100kmhr

Group: AirborneWindEnergy Message: 25325 From: dave santos Date: 3/24/2019
Subject: Re: COTS C-Kites, Turn-rate, and AirSpace Efficiency

Group: AirborneWindEnergy Message: 25326 From: dave santos Date: 3/24/2019
Subject: New AWE Sports?

Group: AirborneWindEnergy Message: 25327 From: dave santos Date: 3/24/2019
Subject: Re: New AWE Sports?

Group: AirborneWindEnergy Message: 25328 From: dave santos Date: 3/24/2019
Subject: The Secret Life of High Voltage Tether Insulation

Group: AirborneWindEnergy Message: 25329 From: dave santos Date: 3/24/2019
Subject: Amazing Remote Drone Delivery System as AWES Self-delivery Model

Group: AirborneWindEnergy Message: 25330 From: dave santos Date: 3/24/2019
Subject: What Surf Foiling Is

Group: AirborneWindEnergy Message: 25331 From: dave santos Date: 3/24/2019
Subject: Re: What Surf Foiling Is

Group: AirborneWindEnergy Message: 25332 From: dave santos Date: 3/25/2019
Subject: Re: COTS C-Kites, Turn-rate, and AirSpace Efficiency



Group: AirborneWindEnergy Message: 25283 From: dave santos Date: 3/21/2019
Subject: Rigging Plan for "Dancing"-Eight Rig
Attachments :
    "Dancing-Eight" refers to a tight Dutch-Roll lying-8 sweep motion. Here is the specific DE rigging plan Tallak requested (attached) that is testing so well, and scaling next to 8m2 OL and 32m2 NPW range.

    Note that low L/D kite apparent-wind direction stays close to true wind direction compared to high L/D kites. This compliance pattern resolves the seeming difference between Dutch Roll and full Eights.
    Group: AirborneWindEnergy Message: 25284 From: dave santos Date: 3/21/2019
    Subject: Re: Rope-drive transmission
    They are roughly equivalent by power-to-mass- a loop-drive carries idle return-phase line (2x mass), and a pumping line has an idle return phase (1/2x time for sine wave). Its a matter of detail-engineering trade-offs which is preferred.



     

    And what is more efficient between rope-drive (Kitewinder as example) and rope-pull (yoyo as example)?
    Group: AirborneWindEnergy Message: 25285 From: dave santos Date: 3/21/2019
    Subject: More Spanish AWE Buzz
    Welcoming the ongoing Spanish news splash in AWE, seeing a test-then-move-on R&D process where starting assumptions simply point the way, rather than become a trap.

    The small prototype depicted is seemingly built around a quad-copter. Such rigid-structure flygen/motorgen AWES architectures may not scale greatly, but such marginal tests teach many essential lessons toward highly evolved designs that count; best of luck to UMadrid on that journey..

    Kites and Drones Can Revolutionize Clean Energy Generation Schemes
    Group: AirborneWindEnergy Message: 25286 From: joe_f_90032 Date: 3/21/2019
    Subject: Re: Rope-drive transmission
    Yo-Yo challenges: 
    1. Downtime (return-phase costs of time and operation changes)
    2. Downwinding losses (reduces apparent wind on wings)

    Loop-drive
    + keeps apparent wind on working wings
    + continuous operation profile
    Group: AirborneWindEnergy Message: 25287 From: joe_f_90032 Date: 3/21/2019
    Subject: Re: Rigging Plan for "Dancing"-Eight Rig
    Group: AirborneWindEnergy Message: 25288 From: dave santos Date: 3/21/2019
    Subject: eWindSolutions active on New Forum
    eWind continuing its R&D run with a new funding round. They have been a slow and insular start, with badly lapsed milestones, but wish them better technical luck tomorrow. Count them in the increasingly crowded pack of market contenders in the 1-20kW AWES class. 

    Nice to see eWind (KatieS) interacting on New Forum-

    Ewindsolutions funding
    Group: AirborneWindEnergy Message: 25289 From: dave santos Date: 3/21/2019
    Subject: SkySails picks up Daedalus Yachts Partner for advanced kite-boat
    Mining New Forum for news, noting SkySails yacht system is COTS for several years now. Daedalus showing a digitally rendered concept for an advanced kite-yacht and kite. 

    Order yours now.

    https://twitter.com/SkysailsYacht/status/1108045737764499457
    Group: AirborneWindEnergy Message: 25290 From: dave santos Date: 3/21/2019
    Subject: Energy Observer, the new world-traveling Solar-Kite-Elec-H2 super-ya
    Group: AirborneWindEnergy Message: 25291 From: dave santos Date: 3/21/2019
    Subject: KitePower Intends to feed Valkenburg Grid
    KitePower intends to grid-tie at its Valkenburg Airport test site. While not a big technical step (kPower was apparently first to grid-tie, at kFarm), skeptics on the New Forum deplore the announcement.

    Plans to provide 1k-1.5k houses with kite power.

    Johannes Peschel on Twitter
    Group: AirborneWindEnergy Message: 25292 From: dave santos Date: 3/21/2019
    Subject: UMadrid Test Video
    Nice two-line power-kite research platform with heddle steering over reeling load-motion.

    Simulation and Flight Testing of Power Kites Applied to Wind Energy Generation
    Group: AirborneWindEnergy Message: 25293 From: dave santos Date: 3/21/2019
    Subject: Team Tuddelpower's latest hit video
    Group: AirborneWindEnergy Message: 25294 From: dave santos Date: 3/21/2019
    Subject: Yoko Tsuno- AWE SciFi Vision from 1976
    Attachments :
      From Kiwee1's Ulule site- KiweeOne your airborne wind turbine

      "Some of you told us about this comic strip released in 1976! In the midst of the oil crisis, designer Roger Leloup projects a futurist technologist into unknown and futuristic worlds. A humanistic fable about tolerance and the possibility of peoples to co-exist peacefully. At the bend of a page ... wind turbines kites as a source of renewable energy …"

      See attachment.

      Yoko Tsuno

      		   @@attachment@@
      Group: AirborneWindEnergy Message: 25295 From: dave santos Date: 3/22/2019
      Subject: Relation of Cosine Loss to Bridle Angle, Rigger's Triangle, etc.
      Attachments :
        Progress in kite design often consists of incremental advances in understanding old principles. Recalling Moritz's and others invocation of Cosine Loss of harvestable kite energy at a high flying angle, extending the cosine principle to the sides of the kite window, and spotting previously unnoticed cosine losses in varied kite rigging details. These cases are expressions of the rigger's force triangle ("hoisting triangle"), where specific trigonometry causes mechanical advantage or disadvantage. 

        We can now associate a kite window's power zone with favored cosine geometry. Basic cosine angle physics hides everywhere in plain sight in kite structures, for example in bridle angles. Proportionally long bridle lines allow a soft kite to inflate its crosswind extent easier and more stably because the bridle lines have less cosine loss. The flip side of cosine loss is the archer's bow-string, where the arrow's cosine relation is favored. The tri-tether mechanism and its cosine relations are a very basic part of kite network design.



        Inline image


        		   @@attachment@@
        Group: AirborneWindEnergy Message: 25296 From: dave santos Date: 3/22/2019
        Subject: KitePower's 60m2 LEI Wing
        Passing the 50m2 scale that DonM first trialed some years ago, KitePower is pushing LEI scaling toward its practical limits. Scaling of such wings is not so much about nominal flight in good wind, but a challenge of ground-handling and exceptions, when buckling forces will occur, and also inflation-phase dependence and endurance-session pressure retention. Non-dimensional wind velocity also limits kite scaling and will drive optimal design.

        We see distinct legacies between EU's BrunoL and US's DaveC, Bruno's inspirational mentor. TUDelft's persistent LEI use is a testament to the workability of the LEI kite at its current scale, while DaveC sought for maximum theoretic scalability far beyond LEI practicality. What will KitePower do when LEI scaling stops far short of utility-scale AWES potential?

        Kitepower Scales up to a 60sqm Kite
        Group: AirborneWindEnergy Message: 25297 From: joe_f_90032 Date: 3/22/2019
        Subject: Re: Race for Water Foundation

        Race for Water Foundation
        and its AWE components
        ==============================
        https://www.raceforwater.org/fr/ 
        ==============================
        We have some notes in this forum already. 
        =============================== 
        Live position
        ================================
        Group: AirborneWindEnergy Message: 25298 From: dave santos Date: 3/22/2019
        Subject: Third-Party LEI to Parafoil Comparisons
        It's more than which power kite is better, but what each kite teaches in cross-comparison about design basics of size, shape, and mass on performance, and many operational nuances. There is an obvious migration trend from LEI to Parafoils, as foils become more LEI-like in their water-friendly properties. The cost question is interesting; LEIs start cheaper, due to less labor-of-construction, but foils cover a broader range of conditions, so a foil quiver can be cheaper by less kites to buy.

        Two good third-party echoes of questions long discussed on the Forum-

        Kiteboarding- Transitioning From Inflatable to Foil Kite




        7 Myths about Foil Kites
        Group: AirborneWindEnergy Message: 25299 From: joe_f_90032 Date: 3/22/2019
        Subject: Re: Energy Observer, the new world-traveling Solar-Kite-Elec-H2 supe

        "While it is pulling the boat through the water, the ship’s propeller turns an electric motor to create electricity. Think of it as a version of regenerative braking. The system can make between 2 and 4 kilowatts of power."
        Group: AirborneWindEnergy Message: 25300 From: joe_f_90032 Date: 3/22/2019
        Subject: Re: Team Tuddelpower's latest hit video
        Group: AirborneWindEnergy Message: 25301 From: joe_f_90032 Date: 3/22/2019
        Subject: Re: Team Tuddelpower's latest hit video
        Mentioned earlier: consider shaft rods: 
        shaped working wings. 
        kPower
        Group: AirborneWindEnergy Message: 25302 From: Joe Faust Date: 3/22/2019
        Subject: Richard Leloup
        Richard Leloup
        ::
        "I work for the “Beyond the Sea” project which was launched by Yves Parlier. More precisely I work on the design and testing of prototype kites and their complete system for yachts. I received my Ph.D. degree in 2014 with Honours from the University of Western Brittany. My research focused on modelling approaches and computational tools for kites sails kinematics and strengthening issues. I graduated in naval architecture and offshore engineering, at ENSTA Bretagne, France, in 2011.  "

        Source:  https://www.researchgate.net/profile/Richard_Leloup
        ===========================
        PhD. thesis, 304 pages
        "Modelling approach and numerical tool developments for kite performance assessment and mechanical design; application to vessels auxiliary propulsion"

        "Elaboration d’un outil d’aide à la prédiction du comportement et de la tenue mécanique d’un cerf-volant auxiliaire de propulsion pour bâtiments de soutien de la flotte Ph.D. Thesis examined on 3rd October 2014"
        ===============================
        http://awec2017.com/2-uncategorised/82-richard-leloup.html 
         
        Group: AirborneWindEnergy Message: 25303 From: Joe Faust Date: 3/22/2019
        Subject: Roger Leloup
        https://en.wikipedia.org/wiki/Roger_Leloup  

        https://tinyurl.com/RogerLeloupCARTOONS

        Any relationship to Richard Leloup of contemporary AWE research?
        Group: AirborneWindEnergy Message: 25304 From: Joe Faust Date: 3/22/2019
        Subject: Re: Roger Leloup
        Attachments :
          Group: AirborneWindEnergy Message: 25305 From: Joe Faust Date: 3/22/2019
          Subject: Re: Roger Leloup
          Group: AirborneWindEnergy Message: 25306 From: dave santos Date: 3/22/2019
          Subject: Re: Energy Observer, the new world-traveling Solar-Kite-Elec-H2 supe
          My higher estimate was theoretic, based on ideal wind and load handling. 2-4kW reported seems to be a function of factors like max charging rate supported, rather than what the kite can do in strong wind. Such numbers reflect that the kite is primarily making boat passage velocity, which requires a few tens of kW itself. While the regen feature is not the primary application, it does represent a terrific "homestead" level of AWES power, for anyone who thinks that' an important milestone.



           


          "While it is pulling the boat through the water, the ship’s propeller turns an electric motor to create electricity. Think of it as a version of regenerative braking. The system can make between 2 and 4 kilowatts of power."
          Group: AirborneWindEnergy Message: 25307 From: dave santos Date: 3/22/2019
          Subject: Re: Energy Observer, the new world-traveling Solar-Kite-Elec-H2 supe
          Whoops, seeing I have confused the two seasteading AWES, but my crude theoretic estimates apply to both boats, as they are similar in scale and principles.



           

          My higher estimate was theoretic, based on ideal wind and load handling. 2-4kW reported seems to be a function of factors like max charging rate supported, rather than what the kite can do in strong wind. Such numbers reflect that the kite is primarily making boat passage velocity, which requires a few tens of kW itself. While the regen feature is not the primary application, it does represent a terrific "homestead" level of AWES power, for anyone who thinks that' an important milestone.

          On ‎Friday‎, ‎March‎ ‎22‎, ‎2019‎ ‎03‎:‎33‎:‎19‎ ‎PM‎ ‎CDT, joefaust333@gmail.com [AirborneWindEnergy] <AirborneWindEnergy@yahoogroups.com


           


          "While it is pulling the boat through the water, the ship’s propeller turns an electric motor to create electricity. Think of it as a version of regenerative braking. The system can make between 2 and 4 kilowatts of power."
          Group: AirborneWindEnergy Message: 25308 From: dave santos Date: 3/22/2019
          Subject: Re: Roger Leloup
          It seems to be two Leloups, based on the youthful photo of the Beyond the Sea team member. 
          Group: AirborneWindEnergy Message: 25309 From: joe_f_90032 Date: 3/22/2019
          Subject: Re: Roger Leloup
          Yes, two distinct persons.
          Are Richard and Roger related?
          ======================================
          Group: AirborneWindEnergy Message: 25310 From: Joe Faust Date: 3/22/2019
          Subject: KitePower jobs, jobs, jobs
          Group: AirborneWindEnergy Message: 25311 From: dave santos Date: 3/22/2019
          Subject: Re: KitePower jobs, jobs, jobs
          "Kite Operator" job listing fits KiteLab's confident prediction that Kite Pilot will increasingly be a serious profession. "Control Pod Mechanic" confirms the significant overhead that Pod dependence entails. 

          All in all, we are seeing the historic first regular kitefarm crew form, where before the R&D team-work has been session-based. 

          While Reeling has its understood weaknesses, it will easily impress the world by setting operational endurance records in a PR echo-chamber with Makani-Shell, etc.. Naïve critics overlook how aptly our bleeding-edge pioneers pave the path forward; they may blaze a bright trail, or just serve as stepping stones, for those to come. Onward!
          Group: AirborneWindEnergy Message: 25312 From: dave santos Date: 3/22/2019
          Subject: KiteSailing Discussion on Sailing Anarchy Forum
          Compare with other expert communities-

          Kite boats
          Group: AirborneWindEnergy Message: 25313 From: benhaiemp Date: 3/22/2019
          Subject: Re: KitePower's 60m2 LEI Wing
          LEI could facilitate automated take-off and landing operations.
          Group: AirborneWindEnergy Message: 25314 From: dave santos Date: 3/22/2019
          Subject: Re: KitePower's 60m2 LEI Wing
          The bigger problem is that once an LEI is in the air, its just not as good a wing. In fact, those who fly parafoils expertly hardly ever have problems launching and landing, including on water. The newer valved "closed-cell" parafoils have LEI-style surface dynamics, so that difference is now small. An LEI can fail in its own ways, like losing high pressure; game-over.

          One parafoil dead-end is if it fills with water; leave it, swim for shore, return with a boat. An LEI by comparison is sea-raft.



           

          LEI could facilitate automated take-off and landing operations.
          Group: AirborneWindEnergy Message: 25315 From: dave santos Date: 3/23/2019
          Subject: Re: Rope-drive transmission
          KiteMotor1 worked by rope-drive method in 2007. There is current confusion on the New Forum about the potential for high-speed rope-driving. Here is the classic engineering text-

          Rope-driving: a treatise on the transmission of power by means of fibrous ropes : Flather, John Joseph, 1862-1926 : Free Download, Borrow, and Streaming : Internet Archive



           

          Kitewinder uses it. See the link on https://forum.awesystems.info/t/rope-drive-transmission/366.


          Another link with an interesting note from DaveS: https://www.resilience.org/stories/2013-03-06/the-mechanical-transmission-of-power-3-endless-rope-drives/ : “As we will see, this makes rope transmission more efficient than any other alternative up to a distance of a few kilometres.” and "Transmitting this energy to Earth is most advantageously done by mechanical power transmission, says researcher Dave Santos from KiteLab Group in an interview:

          “Electric cables would be too heavy. With kites, power-to-mass-plus-aerodrag is critical, and the mechanical case wins by a large factor. Wire rope is not quite so amazing as our new materials, but good enough for a critical advantage over electrical. The main challenge is to learn how to drive ropes at speeds of hundreds-of-miles-an-hour.”"

          A high tension due to the power or/and lifting kite(s) would favor a better transmission.

          (I put again this post because the link didn't work.)
          Group: AirborneWindEnergy Message: 25316 From: dave santos Date: 3/23/2019
          Subject: Advancing Atmospheric Gravity Wave Science
          Attachments :
          Attached PDF helps validate empirical observations of many kite flight anomalies, some rare but dramatic, like "washing machine" turbulence (breaking gravity waves). Many key references cited. Our waves, in wind, are "extraordinary". We knew that.

          Atmospheric gravity wave ray tracing: Ordinary and extraordinary waves 
          R. Michael Jones, Alfred J. Bedard, 2018


          Highlights

          •

          We demonstrate the calculation of atmospheric internal gravity waves using a ray tracing program.

          •

          In the presence of wind, there are two types of waves, which we designate as ordinary and extraordinary.

          •

          We contrast the properties of four atmospheric gravity wave types outlining their distinguishing characteristics.

          •

          We identify the ambiguity in finding atmospheric gravity wave launch ray conditions, which should be of interest to Gravity wave researchers.


          		   @@attachment@@
          Group: AirborneWindEnergy Message: 25317 From: joe_f_90032 Date: 3/23/2019
          Subject: Richard Leloup

          Richard Leloup

          https://www.researchgate.net/profile/Richard_Leloup

          "I work for the “Beyond the Sea” project which was launched by Yves Parlier. More precisely I work on the design and testing of prototype kites and their complete system for yachts. I received my Ph.D. degree in 2014 with Honours from the University of Western Brittany. My research focused on modelling approaches and computational tools for kites sails kinematics and strengthening issues. I graduated in naval architecture and offshore engineering, at ENSTA Bretagne, France, in 2011."


          PhD thesis

          https://tinyurl.com/LeLoupThesis304


          Modelling approach and numerical tool developments for kite performance assessment and mechanical design; application to vessels auxiliary propulsion 


          Elaboration d’un outil d’aide à la prédiction du comportement et de la tenue mécanique d’un cerf-volant auxiliaire de propulsion pour bâtiments de soutien de la flotte 


          Ph.D. Thesis examined on 3rd October 2014 Committee members: Dr.-Ing. Roland Schmehl Director of the Kite Power research group, Delft University of Technology / Reviewer Pr. Dr.-Ing. Bettar O. el Moctar D
          Group: AirborneWindEnergy Message: 25318 From: dave santos Date: 3/23/2019
          Subject: Re: Richard Leloup
          Richard's thesis shows how far kite-shipping has come since Dave Culp and friends founded modern R&D in the '70s. This is still just a sampling of current thinking and activity in the kitesailing field (compare with Sailing Anarchy and Old Forum discussion, and kite-solar-H2 yachts).



           

          Richard Leloup

          https://www.researchgate.net/profile/Richard_Leloup

          "I work for the “Beyond the Sea” project which was launched by Yves Parlier. More precisely I work on the design and testing of prototype kites and their complete system for yachts. I received my Ph.D. degree in 2014 with Honours from the University of Western Brittany. My research focused on modelling approaches and computational tools for kites sails kinematics and strengthening issues. I graduated in naval architecture and offshore engineering, at ENSTA Bretagne, France, in 2011."


          PhD thesis

          https://tinyurl.com/LeLoupThesis304


          Modelling approach and numerical tool developments for kite performance assessment and mechanical design; application to vessels auxiliary propulsion 


          Elaboration d’un outil d’aide à la prédiction du comportement et de la tenue mécanique d’un cerf-volant auxiliaire de propulsion pour bâtiments de soutien de la flotte 


          Ph.D. Thesis examined on 3rd October 2014 Committee members: Dr.-Ing. Roland Schmehl Director of the Kite Power research group, Delft University of Technology / Reviewer Pr. Dr.-Ing. Bettar O. el Moctar D
          Group: AirborneWindEnergy Message: 25319 From: dave santos Date: 3/23/2019
          Subject: Re: Rope-drive transmission
          We know rope can driven very fast through the air, up to its melting point as aerodynamic skin-friction increases. UHMWPE looks good for Mach1, and Tungsten wire is seen as a way to fly WayneG's Mach10 kites at the edge of space. For now, Mach.5 would be fantastic rope-drive velocity, for a sewing thread to transmit around 1kW. Here is an old Mach.77 rope similarity case, aerial refueling of the SR71-

          What's the top never-exceed airspeed for in-air refueling? - Quora





           

          KiteMotor1 worked by rope-drive method in 2007. There is current confusion on the New Forum about the potential for high-speed rope-driving. Here is the classic engineering text-

          Rope-driving: a treatise on the transmission of power by means of fibrous ropes : Flather, John Joseph, 1862-1926 : Free Download, Borrow, and Streaming : Internet Archive

          On ‎Saturday‎, ‎March‎ ‎23‎, ‎2019‎ ‎12‎:‎03‎:‎46‎ ‎AM‎ ‎CDT, pierre-benhaiem@orange.fr [AirborneWindEnergy] <AirborneWindEnergy@yahoogroups.com


           

          Kitewinder uses it. See the link on https://forum.awesystems.info/t/rope-drive-transmission/366.


          Another link with an interesting note from DaveS: https://www.resilience.org/stories/2013-03-06/the-mechanical-transmission-of-power-3-endless-rope-drives/ : “As we will see, this makes rope transmission more efficient than any other alternative up to a distance of a few kilometres.” and "Transmitting this energy to Earth is most advantageously done by mechanical power transmission, says researcher Dave Santos from KiteLab Group in an interview:

          “Electric cables would be too heavy. With kites, power-to-mass-plus-aerodrag is critical, and the mechanical case wins by a large factor. Wire rope is not quite so amazing as our new materials, but good enough for a critical advantage over electrical. The main challenge is to learn how to drive ropes at speeds of hundreds-of-miles-an-hour.”"

          A high tension due to the power or/and lifting kite(s) would favor a better transmission.

          (I put again this post because the link didn't work.)
          Group: AirborneWindEnergy Message: 25320 From: dave santos Date: 3/23/2019
          Subject: RC Aerotowing- New Tethered Aviation Specialty
          Aerotow is an ultimate launching method in AWE, to reach higher above surface calm, and not burden the WECS unit with launching mass. Aerotow can be automated in due time. Here's how to play at it-

          Aerotowing: An Introduction to an RC Team Sport - Model Airplane News
          Group: AirborneWindEnergy Message: 25321 From: dave santos Date: 3/23/2019
          Subject: Re: RC Aerotowing- New Tethered Aviation Specialty
          RC Banner Towing is also a Thing. Here is a nice end-to-end demo-

          R/C Airplane towing a banner ---Scale







           

          Aerotow is an ultimate launching method in AWE, to reach higher above surface calm, and not burden the WECS unit with launching mass. Aerotow can be automated in due time. Here's how to play at it-

          Aerotowing: An Introduction to an RC Team Sport - Model Airplane News
          Group: AirborneWindEnergy Message: 25322 From: dave santos Date: 3/24/2019
          Subject: COTS C-Kites, Turn-rate, and AirSpace Efficiency
          The demands of freestyle kitesports have evolved the fastest turning kites, C-kites. These wings generate high power in the turn state, and are thus ideal for compact pattern flying like PierreB has been advocating, to conserve AWES airspace.*

          The design qualities of the C-kite kite that promote turning performance are C-form and resulting moderate (projected) AR. For large-pattern flying with slow turns, a race kite of high AR is favored. These principles apply to dense kite-networks with fast-tight lattice-wave motion, thus C-kites look like a good COTS bet.

          C-kites come in both LEI and parafoil versions. PeterL's Arc C-kite parafoils are a notable classic.


          ===========
          * Not good news for Ampyx and Makani, with large turn patterns, and more kitefarm sprall.
          Group: AirborneWindEnergy Message: 25323 From: dave santos Date: 3/24/2019
          Subject: Crosswind Load-Motion Turn-Rate
          Attachments :
            A technical lesson from kFarm's AWES Crosswind Cableway testing was too much phase time lost after tacking the kite for it to ferry itself to its new hauling angle. Payne fig5 and LeoG got it right; the kite should haul back and forth on the apex of an "A-frame" tether, with no swing-phase loss.

            An ideal crosswind cycle has a quick kite-turn at each end, with prompt reversal of load-motion. Surface crosswind tracks and cables without the A-frame rig are disadvantaged. The superior geometry opens up short-stroke crosswind performance for dense kite-cell arrays.


            		   @@attachment@@
            Group: AirborneWindEnergy Message: 25324 From: dave santos Date: 3/24/2019
            Subject: Ice kiting at ~100kmhr
            Group: AirborneWindEnergy Message: 25325 From: dave santos Date: 3/24/2019
            Subject: Re: COTS C-Kites, Turn-rate, and AirSpace Efficiency
            To extend basic power-kite turn-rate theory to C-kite turning, its always been obvious that a balanced mix of "brake" line and CE shift input is the fastest turn. Less known is better CE shift by push-turn input.

            C-kite "ears" obviously dig into a turn better than a flat kite can. An inside-turn C-kite ear at high Cl promotes a crack-the-whip action on the outer wing area, boosting its lift. The outer ear flattens and feathers along or even adds tip-washout, for minimal induced drag.







             

            The demands of freestyle kitesports have evolved the fastest turning kites, C-kites. These wings generate high power in the turn state, and are thus ideal for compact pattern flying like PierreB has been advocating, to conserve AWES airspace.*

            The design qualities of the C-kite kite that promote turning performance are C-form and resulting moderate (projected) AR. For large-pattern flying with slow turns, a race kite of high AR is favored. These principles apply to dense kite-networks with fast-tight lattice-wave motion, thus C-kites look like a good COTS bet.

            C-kites come in both LEI and parafoil versions. PeterL's Arc C-kite parafoils are a notable classic.


            ===========
            * Not good news for Ampyx and Makani, with large turn patterns, and more kitefarm sprall.
            Group: AirborneWindEnergy Message: 25326 From: dave santos Date: 3/24/2019
            Subject: New AWE Sports?
            "Energy Sports" are more than the patiently awaited "AWE Challenge" model. Sport AWE comes with an R&D funding model, from sport spectator revenue. Attractive variations-

            One-Design Classes- Participants fly the same power kites side-by-side while raw AWE performance is measured. Contests could last days or more. Best-piloted teams will generate more power.

            Formula Classes- Participants design AWES to Rules, like max-mass-aloft, max-airspace-&-footprint, or best LCOE. Superior designs will prevail.

            Prestige Events- AWE as such could someday be a wildly popular Olympic Sport, even powering a futuristic Games, or inspire a sort of Trophy Cup megaevent.

            Sport-AWE spring-training time has begun :)
            Group: AirborneWindEnergy Message: 25327 From: dave santos Date: 3/24/2019
            Subject: Re: New AWE Sports?
            Claiming AWE Sports, as "Energy Sports" (where generating energy is the sport), for the Open-AWE_IP-Pool

            ----------
            Reminder: The AWE IP Pool allows anyone to personally prosper from developing claimed ideas, but requires Pool CC licensing for mass-market (progressively mid-cap) deployment. The collective intent is preventing any abusive business monopoly developing in AWE, like a Google, Shell, or SABIC owning AWE by IP domination.






             

            "Energy Sports" are more than the patiently awaited "AWE Challenge" model. Sport AWE comes with an R&D funding model, from sport spectator revenue. Attractive variations-

            One-Design Classes- Participants fly the same power kites side-by-side while raw AWE performance is measured. Contests could last days or more. Best-piloted teams will generate more power.

            Formula Classes- Participants design AWES to Rules, like max-mass-aloft, max-airspace-&-footprint, or best LCOE. Superior designs will prevail.

            Prestige Events- AWE as such could someday be a wildly popular Olympic Sport, even powering a futuristic Games, or inspire a sort of Trophy Cup megaevent.

            Sport-AWE spring-training time has begun :)
            Group: AirborneWindEnergy Message: 25328 From: dave santos Date: 3/24/2019
            Subject: The Secret Life of High Voltage Tether Insulation
            There are severe limits to how high voltage insulation will tolerate AWES winching cycles when integrated into a primary tension rope (like the M600). Strenuous wear and single-point damage will cause insulation air gaps with moisture intrusion, promoting destructive arcing and steam, and maybe total platform loss. Here's a new bird-poop failure mode- Corrosive poop on coiled high-voltage tethers causing electrical field faults. Kite-fabric service life is like a gold-standard by comparison to high-voltage risks.

            As the link below reveals, no "best" insulator is suited to resolve the electrical tether challenge. Airborne conductors seem limited to ~5kV in current practice, or far less, if reliable endurance is expected. Spreading out naked non-structural conductors is a possible flygen path forward. For DIY use, kPower recommends electric fence wire, a strong but hefty alu-nickel alloy. A cheap extension cord is a ready experimental option to around 30m, with doubled voltage reasonable. Otherwise, bring on the Mach.77 UHMWPE AWES demo somehow driving a groundgen.

            7 most known high voltage insulation methods you should know | EEP
            Group: AirborneWindEnergy Message: 25329 From: dave santos Date: 3/24/2019
            Subject: Amazing Remote Drone Delivery System as AWES Self-delivery Model
            Group: AirborneWindEnergy Message: 25330 From: dave santos Date: 3/24/2019
            Subject: What Surf Foiling Is
            Group: AirborneWindEnergy Message: 25331 From: dave santos Date: 3/24/2019
            Subject: Re: What Surf Foiling Is
            Group: AirborneWindEnergy Message: 25332 From: dave santos Date: 3/25/2019
            Subject: Re: COTS C-Kites, Turn-rate, and AirSpace Efficiency
            Tallak Tveide <tallakt@gmail.com


             

            To extend basic power-kite turn-rate theory to C-kite turning, its always been obvious that a balanced mix of "brake" line and CE shift input is the fastest turn. Less known is better CE shift by push-turn input.

            C-kite "ears" obviously dig into a turn better than a flat kite can. An inside-turn C-kite ear at high Cl promotes a crack-the-whip action on the outer wing area, boosting its lift. The outer ear flattens and feathers along or even adds tip-washout, for minimal induced drag.





            On ‎Sunday‎, ‎March‎ ‎24‎, ‎2019‎ ‎09‎:‎11‎:‎47‎ ‎AM‎ ‎CDT, dave santos santos137@yahoo.com [AirborneWindEnergy] <AirborneWindEnergy@yahoogroups.com


             

            The demands of freestyle kitesports have evolved the fastest turning kites, C-kites. These wings generate high power in the turn state, and are thus ideal for compact pattern flying like PierreB has been advocating, to conserve AWES airspace.*

            The design qualities of the C-kite kite that promote turning performance are C-form and resulting moderate (projected) AR. For large-pattern flying with slow turns, a race kite of high AR is favored. These principles apply to dense kite-networks with fast-tight lattice-wave motion, thus C-kites look like a good COTS bet.

            C-kites come in both LEI and parafoil versions. PeterL's Arc C-kite parafoils are a notable classic.


            ===========
            * Not good news for Ampyx and Makani, with large turn patterns, and more kitefarm sprall..