Messages in AirborneWindEnergy group.                          AWES 25433 to 25484 Page 400 of 440.
Group: AirborneWindEnergy Message: 25433 From: dougselsam Date: 4/2/2019
Subject: Re: Solving AWE as a "Wicked Problem" (Classic Planning Science)

Group: AirborneWindEnergy Message: 25434 From: Santos Date: 4/2/2019
Subject: Re: Solving AWE as a "Wicked Problem" (Classic Planning Science)

Group: AirborneWindEnergy Message: 25435 From: benhaiemp Date: 4/2/2019
Subject: Re: Fort Felker's presentation in AWEC2017

Group: AirborneWindEnergy Message: 25436 From: Santos Date: 4/3/2019
Subject: Re: Fort Felker's presentation in AWEC2017

Group: AirborneWindEnergy Message: 25437 From: dougselsam Date: 4/3/2019
Subject: The Story of the Three Little Pigs

Group: AirborneWindEnergy Message: 25438 From: benhaiemp Date: 4/3/2019
Subject: Re: Fort Felker's presentation in AWEC2017

Group: AirborneWindEnergy Message: 25439 From: dougselsam Date: 4/3/2019
Subject: GE's new giant 12 MW turbine -- OMG!

Group: AirborneWindEnergy Message: 25440 From: Santos Date: 4/3/2019
Subject: Re: Fort Felker's presentation in AWEC2017

Group: AirborneWindEnergy Message: 25441 From: Joe Faust Date: 4/3/2019
Subject: Lightning strikes to AWESs

Group: AirborneWindEnergy Message: 25442 From: benhaiemp Date: 4/3/2019
Subject: Re: GE's new giant 12 MW turbine -- OMG!

Group: AirborneWindEnergy Message: 25443 From: Santos Date: 4/3/2019
Subject: Re: GE's new giant 12 MW turbine -- OMG!

Group: AirborneWindEnergy Message: 25444 From: Santos Date: 4/3/2019
Subject: Re: Lightning strikes to AWESs

Group: AirborneWindEnergy Message: 25445 From: Santos Date: 4/3/2019
Subject: Re: GE's new giant 12 MW turbine -- OMG!

Group: AirborneWindEnergy Message: 25446 From: benhaiemp Date: 4/5/2019
Subject: Re: kiteKRAFT

Group: AirborneWindEnergy Message: 25448 From: dave santos Date: 4/5/2019
Subject: Kite network control- Edo-bridle as addressable input field

Group: AirborneWindEnergy Message: 25449 From: dave santos Date: 4/5/2019
Subject: Re: First double-piloting of Drone and Kite

Group: AirborneWindEnergy Message: 25450 From: tallakt Date: 4/5/2019
Subject: Re: Fort Felker's presentation in AWEC2017

Group: AirborneWindEnergy Message: 25452 From: dave santos Date: 4/6/2019
Subject: kPower again Demos AWE at Austin Kite Festival, South Asians attend

Group: AirborneWindEnergy Message: 25453 From: dave santos Date: 4/6/2019
Subject: Re: kPower again Demos AWE at Austin Kite Festival, South Asians att

Group: AirborneWindEnergy Message: 25454 From: benhaiemp Date: 4/6/2019
Subject: Re: Fort Felker's presentation in AWEC2017

Group: AirborneWindEnergy Message: 25455 From: dave santos Date: 4/6/2019
Subject: Mexican AWE Talk mentioned in Tweet

Group: AirborneWindEnergy Message: 25456 From: benhaiemp Date: 4/6/2019
Subject: Re: Fort Felker's presentation in AWEC2017

Group: AirborneWindEnergy Message: 25457 From: dave santos Date: 4/6/2019
Subject: Re: Fort Felker's presentation in AWEC2017

Group: AirborneWindEnergy Message: 25458 From: dave santos Date: 4/6/2019
Subject: Latest SS Wings by Born Kite

Group: AirborneWindEnergy Message: 25459 From: dave santos Date: 4/6/2019
Subject: Natural Fibers for Kites Compared with Synthetics

Group: AirborneWindEnergy Message: 25460 From: benhaiemp Date: 4/7/2019
Subject: Re: Natural Fibers for Kites Compared with Synthetics

Group: AirborneWindEnergy Message: 25461 From: benhaiemp Date: 4/7/2019
Subject: Re: Fort Felker's presentation in AWEC2017

Group: AirborneWindEnergy Message: 25462 From: dave santos Date: 4/7/2019
Subject: Re: Natural Fibers for Kites Compared with Synthetics

Group: AirborneWindEnergy Message: 25463 From: dave santos Date: 4/7/2019
Subject: Re: Fort Felker's presentation in AWEC2017

Group: AirborneWindEnergy Message: 25464 From: dave santos Date: 4/7/2019
Subject: Situating Biplane Kite and High Cl Discussion

Group: AirborneWindEnergy Message: 25465 From: dave santos Date: 4/7/2019
Subject: Re: Situating Biplane Kite and High Cl Discussion

Group: AirborneWindEnergy Message: 25466 From: Joe Faust Date: 4/7/2019
Subject: Kite Network Theory

Group: AirborneWindEnergy Message: 25467 From: Joe Faust Date: 4/7/2019
Subject: Re: Kite Network Theory

Group: AirborneWindEnergy Message: 25468 From: Joe Faust Date: 4/7/2019
Subject: Kitefoiling

Group: AirborneWindEnergy Message: 25469 From: Joe Faust Date: 4/7/2019
Subject: Re: Kitefoiling

Group: AirborneWindEnergy Message: 25470 From: dave santos Date: 4/7/2019
Subject: Re: Kitefoiling

Group: AirborneWindEnergy Message: 25471 From: benhaiemp Date: 4/7/2019
Subject: Re: Kitefoiling

Group: AirborneWindEnergy Message: 25472 From: Joe Faust Date: 4/7/2019
Subject: Re: Kitefoiling

Group: AirborneWindEnergy Message: 25473 From: dave santos Date: 4/7/2019
Subject: Re: Kitefoiling [1 Attachment]

Group: AirborneWindEnergy Message: 25474 From: dave santos Date: 4/7/2019
Subject: Rare NPW-OL Morph (Falken)

Group: AirborneWindEnergy Message: 25475 From: dave santos Date: 4/7/2019
Subject: Cool Bol and Playsail

Group: AirborneWindEnergy Message: 25476 From: Joe Faust Date: 4/7/2019
Subject: Pierre Benhaiem patent portfolio

Group: AirborneWindEnergy Message: 25477 From: dave santos Date: 4/7/2019
Subject: Re: Pierre Benhaiem patent portfolio

Group: AirborneWindEnergy Message: 25478 From: Joe Faust Date: 4/7/2019
Subject: Re: Rare NPW-OL Morph (Falken)

Group: AirborneWindEnergy Message: 25479 From: joe_f_90032 Date: 4/7/2019
Subject: Re: Rare NPW-OL Morph (Falken)

Group: AirborneWindEnergy Message: 25480 From: dave santos Date: 4/7/2019
Subject: Re: Mexican AWE Talk mentioned in Tweet

Group: AirborneWindEnergy Message: 25481 From: dave santos Date: 4/7/2019
Subject: Bladetips Energy Advancing

Group: AirborneWindEnergy Message: 25482 From: benhaiemp Date: 4/7/2019
Subject: Re: Cool Bol and Playsail

Group: AirborneWindEnergy Message: 25483 From: joe_f_90032 Date: 4/8/2019
Subject: Re: Bladetips Energy Advancing

Group: AirborneWindEnergy Message: 25484 From: dave santos Date: 4/8/2019
Subject: Re: Bladetips Energy Advancing



Group: AirborneWindEnergy Message: 25433 From: dougselsam Date: 4/2/2019
Subject: Re: Solving AWE as a "Wicked Problem" (Classic Planning Science)
daveS: If you don't have anything to say, you don't need to answer my posts.
"Wicked problem"  Wicked-cool.  Nothing but adolescent Boston slang.  Pissah.
Group: AirborneWindEnergy Message: 25434 From: Santos Date: 4/2/2019
Subject: Re: Solving AWE as a "Wicked Problem" (Classic Planning Science)
Doug, sharing this fine paper is just not your preference, but Boston slang is, although overrated in your comparison, with less bearing on AWE. Go ahead and call AWE wicked-cool in your own topic, and just how you are living up these days to your inventive vision. Why do you only troll, year after year, with no good news? Read the paper to answer that.
Group: AirborneWindEnergy Message: 25435 From: benhaiemp Date: 4/2/2019
Subject: Re: Fort Felker's presentation in AWEC2017
Attachments :

    Fort Felker (please see the attachment): “Our largest kite to date, it has a wingspan of 26 m, and has eight onboard rotors that are each 2.3 m in diameter. For comparison, our previous prototype, Wing 7, was a 20 kW system with a 8m wingspan and with four rotors 0.7 m in diameter.”


    The turbines aloft should add 1/2 drag of the wing alone in order to reach an optimal efficiency, the speed becoming 2/3.


    But the drag of “eight onboard rotors that are each 2.3 m in diameter” (secondary rotors = 33 m²) seems to be largely above 1/2 the wing alone drag. Have you some explains please? Is it the large drag of the support of the turbines?


    I put some calculation for FlygenKite which is a soft wing carrying an onboard (secondary) rotor (please see also my comments as corrections):

    ResearchGate

    (PDF) Elements for an optimization of an AWES of type flygen

    PDF | Introduction A flygen is a configuration of AWES with generator aloft. The power at the rotor increases with the cube of the apparent wind speed which is several times the value of the real wind speed, and is indirectly linked to the area swept...



    		   @@attachment@@
    Group: AirborneWindEnergy Message: 25436 From: Santos Date: 4/3/2019
    Subject: Re: Fort Felker's presentation in AWEC2017
    High M600 rotor disc area is needed for E-VTOL, including safety factor. Full drag for harvesting is not the design necessity.
    Group: AirborneWindEnergy Message: 25437 From: dougselsam Date: 4/3/2019
    Subject: The Story of the Three Little Pigs

    The Story of the Three Little Pigs

    Three pigs came to town on a warm summer’s day,

    and they said to each other what a nice place to stay.

    They each made their plans with remarkable speed,

    and they went out to look for the things they would need.

     

    The first little pig built a house made of straw,

    he thatched and he thatched till he couldn’t thatch any more.

    He worked every day till his trotters were sore,

    then early one evening came a knock on the door.

     

    "Little pig, little pig won’t you let me come in?"

    "No, no, no, by the hair on my chinny, chin, chin."

    "Then I’ll huff and I’ll puff and I’ll blow your house in."

    No, no, no, Mr. Wolf I will not let you in."

     

    So he huffed,

    and he puffed,

    and he huffed and he puffed and he blew the house in

     

    The second little pig built a house made of sticks,

    he paid close attention to all the fiddley bits.

    With curtains on the windows and carpet on the floor,

    then early one evening came a knock on the door.

     

    "Little pig, little pig won’t you let me come in?"

    "No, no, no, by the hair on my chinny, chin, chin."

    "Then I’ll huff and I’ll puff and I’ll blow your house in."

    No, no, no, Mr. Wolf I will not let you in."

     

    So he huffed,

    and he puffed,

    and he huffed,

    and he puffed,

    and he huffed and he puffed and he blew the house in

     

    The third little pig built a house made of bricks,

    which he felt would be stronger than straw or than sticks.

    He painted the ceiling and he painted the walls,

    then early one evening came a knock on the door.

     

    "Little pig, little pig won’t you let me come in?"

    "No, no, no, by the hair on my chinny, chin, chin."

    "Then I’ll huff and I’ll puff and I’ll blow your house in."

    No, no, no, Mr. Wolf I will not let you in."

     

    So he huffed,

    and he puffed,

    and he huffed,

    and he puffed,

    and he huffed,

    and he puffed,

    and he huffed and he puffed but it did not blow in

     

    Now the three little pigs each had a house made of bricks,

    so they wouldn’t have to worry bout the wolf and his tricks.

    They each found a wife from that same little town,

    and soon there were piglets all running around.
    Group: AirborneWindEnergy Message: 25438 From: benhaiemp Date: 4/3/2019
    Subject: Re: Fort Felker's presentation in AWEC2017

    Indeed E-VTOL requirement seems plausible but even half of rotors area looks to be high in regard to the wing alone, by taking into account of its high L/D ratio, so its low D.
    Group: AirborneWindEnergy Message: 25439 From: dougselsam Date: 4/3/2019
    Subject: GE's new giant 12 MW turbine -- OMG!

    Over an eighth-of-a-mile diameter rotor?  Geez these blades will see a different climate with every rotation.  Arctic at the top, tropical at the bottom.  Different zip-codes?  Different time-zones?  Different tax regimes?

    https://www.cnbc.com/2019/04/01/installation-of-ges-12-megawatt-wind-turbine-prototype-on-schedule.html

    Yesterday's unthinkable is today's new reality. 

    Clearly, our resident "expert" was not consulted on this rash decision.

    Did you know it's been proven the only way turbines this big could have been constructed is with the help of space aliens?  Just kidding.  It was "Jesus".

    https://www.quora.com/If-the-letter-J-wasnt-invented-until-1600-how-did-Jesus-get-his-name-2013-years-ago

    :)
    Group: AirborneWindEnergy Message: 25440 From: Santos Date: 4/3/2019
    Subject: Re: Fort Felker's presentation in AWEC2017
    There is also square-cube scaling, which requires exponentially more rotor area to still do VTOL as mass increases. The M600 is proportioned for it's high mass, plus some safety factor. Smaller rotors risk settling-under-power.
    Group: AirborneWindEnergy Message: 25441 From: Joe Faust Date: 4/3/2019
    Subject: Lightning strikes to AWESs
    Lightning strikes to AWESs 
    ==============================
    We'll keep this topic thread open for accumulating data, studies, incidents, costs, solutions, questions, discussions, avoidance strategies, etc. regarding lightning strikes to AWESs. 
    ===============
    The literature on lightning strikes to other structures, kite systems, and aircraft may play to inform the topic.  Specific AWES will have their specific experiences. Comparisons are eventually anticipated among types of AWES and types of operations. 
    ===============
    Lighting strikes to some AWES may lead to injury or death of persons.
    ==========
    Tease start holds a failure to obtain a strike: 

    Catching lighting bolts with the help of a kite. Experiments with lighting bolts 

    ==================
    For some AWES explorations the following might be of interest: 
    ==================
    Our forum search over "lightning" HERE 
    ======================
    Group: AirborneWindEnergy Message: 25442 From: benhaiemp Date: 4/3/2019
    Subject: Re: GE's new giant 12 MW turbine -- OMG!
    Let us use the tower as an horizontal spar supporting the turbine, then implement a one km span crosswind flexible kite in a 250 MW FlygenKite mode.  
    Group: AirborneWindEnergy Message: 25443 From: Santos Date: 4/3/2019
    Subject: Re: GE's new giant 12 MW turbine -- OMG!
    Doug is not consulted either by GE, nor do they know AWE as well as our R&D community, where Dr. Beaujean's 500MW rotor concept, and comparable ideas, intend to scale far beyond any conventional wind tech possibility. Good luck to Doug and GE in AWE proper.
    Group: AirborneWindEnergy Message: 25444 From: Santos Date: 4/3/2019
    Subject: Re: Lightning strikes to AWESs
    For persistently airborne kite networks, lightning damage is an expected cost and maintenance factor, proportional to exposure risk. Single line kite units are most impacted by runaway risk. Countering AWES lightning hazard is an open study, with many ideas in play. Corona discharge is a closely related problem. KiteLab Ilwaco has experienced line failure due to discharge, but the conditions are rare.
    Group: AirborneWindEnergy Message: 25445 From: Santos Date: 4/3/2019
    Subject: Re: GE's new giant 12 MW turbine -- OMG!

    A kite will make more power with less cost by driving a ground gen. Further, the GE turbine is unfit to be a flygen rotor. Make no mistake, AWE is aviation, and conventional wind tech is not "the right stuff" to fly well.
    Group: AirborneWindEnergy Message: 25446 From: benhaiemp Date: 4/5/2019
    Subject: Re: kiteKRAFT

    Some update: their 5 kW biplan 2.4 m span prototype on https://twitter.com/kite_power/status/1113818347504832512 . Congratulations for KiteKRAFT team.


    Some other links: their website on http://www.kitekraft.de/ and also explains on https://medium.com/kitekraft/kitekraft-unveils-5-kw-kite-c7851f7dad8?_branch_match_id=349810043745799328.


    The theory was investigated on https://www.researchgate.net/publication/320742362_Drag_power_kite_with_very_high_lift_coefficient .


    A very interesting design combinating high power density in a compact and robust three dimensional object thanks to the high lift of the biplan configuration.
    Group: AirborneWindEnergy Message: 25448 From: dave santos Date: 4/5/2019
    Subject: Kite network control- Edo-bridle as addressable input field
    The classic Japanese Edo-kite has a high line-count bridle star-topology to distribute loads and damp flight instability. To manage so many bridle lines, a small rigging plate* is provided with a grid-pattern of holes for each bridle line to have a unique address at the focal point. If something goes wrong at either end of the long bridle line, its quickly identified and cleared at both ends

    This Edo capability is a scaling path, an addressable field of bridles, that can be extended from static tuning inputs to dynamic field patterns. To activate channels there are various rigging options, like grouped lines in tree topology, or systems of heddles, even as Jacquard Loom display messages in the sky, by kite pixels. The center node is server and the lines control client operations.

    This is a promising low-complexity way to make Wubbo's SpiderMill principle work. All the unit-kite control lines are Edo-rigged into two alternating input sets, as aggregated two-line control of the bulk oscillation of all units. Compare with methods that require active controls at every unit-kite. Open-AWE_IP-Cloud


    =============
    * The rigging plate is seen at the start of this clip. Its a rows-columns field matrix matching the face of this baby Edo-

    Edo-kite: The Rope Work.
    Group: AirborneWindEnergy Message: 25449 From: dave santos Date: 4/5/2019
    Subject: Re: First double-piloting of Drone and Kite
    Here's a rough cut of kPower's 1st combined kite-drone session. The smudge in the frame is crash damage on the lens. Music is even worse. Almost everything is slow-motion. Things will get crazier soon.

    03 28 fast kite in slowmo





    More Notes-

    kPower's kite and drone integrated-operations testing explores an techno-ecological relation of different capabilities with respective strengths. 

    While its popular in AWE to combine kite and drone in one platform, as UdoZ envisions "Energy Drones", and several teams design/build/fly drone-kite hybrids, physical melding into a single unit limits max performances below that of separated functions. Free-flight and tethered relations between kite and drone seem most potent and versatile. 

    There is a working ratio of kite to drone that varies from one drone serving many kites, to a single giant kite mothership with an associated swarm of drones.





     

    Like JoeF, Brooks is an early modern hang-gliding pioneer, noted for flying in low lift when no one else could stay up, Texas' highest brain-to-mass pilot. Brooks' father was the top NASA space shuttle acoustics engineer, who kindly mentored many of us in Austin, who created a superior early competitor to MATLAB that failed to secure VC. Brook's brother carries on the family phonon-biz with an aerospace vibration testing lab. kPower is lucky to have the Colemans joining its AWE R&D circle.

    On a related track; Brooks reveals that Robofest, which I founded in Austin at Discovery Hall in 1990, jumped to SF Bay Area by talents Ben Davis and Paco Nathan producing a version, then cloned by Wiley to become Maker's Faire franchise. I was not around when Brooks gave Makers permission to clone Robofest, but serious consideration is overdue.  Ironically, Makani's founding circle coalesced around the SF Maker "movement", never imagining me the originator. Nor did I know the Robofest direct-connection when I read Dave Culp's Maker zines in KiteShip's desert testing lab bathroom. 

    Survival Research Laboratories is our true SF merit-peer, that we hosted in Austin. Wiley's Maker brand is a nauseating corporate rip-off compared to our authentic guerilla DIY counter-culture circles. Wiley did at least publish early AWE demos by volunteer contributors, that we duly reviewed. My brother was laid-off by a cash-laden Wiley when his pioneering psychometric software employer (Profiles International) was bought up and gutted.

    AWE is an ongoing dramatic human and kite saga, a grand contest between corporate and DIY culture, with academia in the middle.
    On ‎Friday‎, ‎March‎ ‎29‎, ‎2019‎ ‎12‎:‎33‎:‎53‎ ‎PM‎ ‎CDT, dave santos santos137@yahoo.com [AirborneWindEnergy] <AirborneWindEnergy@yahoogroups.com


     

    Brooks is an old pal from Silicon Barrio and Robot Group days 30+ yrs ago, when another friend, software/firmware engineer, Alex Isles, brought back to Austin the first gyro-stabilized quad-copter from Japan, a marvel of foam and electronics, with tiny brass flywheel gyros. It was passed around to try it, and we had to make our own replacement blades. Brooks became the top quad pilot for Robot Group events (I worked animatronic blimps and tethered flying effects and my brother was similarly an early adept with e-copters). 

    Brooks' early mastery of the quadcopter piloting made him the first highly skilled drone pilot in US of this type. His flying skills qualify him for team flying with pros half his age. He was able to loop around the kite while keeping the camera aimed. I also watched him fly wild high-speed aerobatics thru open forest, only crashing twice, with a long pole handy to bring down a treed drone. The drone just bounced off of cactus.

    Brooks now makes his own drones, including flying sculptural gems of acid-etched aluminum, and plans to bring a lot of drone-based special light and pyro effects to ongoing kPower AWEfest R&D. The kite-drone stunt happened because I jammed the kite winder in his legs while he was helpless under the hood.

    Active kPower testing of combined kite-drone operational research has several goals- Remote FPV (First Person Viewing) to and from kite, airborne charging with AWE, soft-kite launching assist, etc.. Many specific methods are Open-AWE_IP-Cloud



    On ‎Friday‎, ‎March‎ ‎29‎, ‎2019‎ ‎08‎:‎57‎:‎55‎ ‎AM‎ ‎CDT, dave santos santos137@yahoo.com [AirborneWindEnergy] <AirborneWindEnergy@yahoogroups.com


     
    [Attachment(s) from dave santos included below]


    More news soon on Drone-Kite Combined Operations Research.
    Group: AirborneWindEnergy Message: 25450 From: tallakt Date: 4/5/2019
    Subject: Re: Fort Felker's presentation in AWEC2017
    The large rotor area probably wont cause a lot of drag if free-spinning (no torque on motor shafts). There might be constraints on the amount of torque/speed possible to use for vtol and also generate electricity effectively
    Group: AirborneWindEnergy Message: 25452 From: dave santos Date: 4/6/2019
    Subject: kPower again Demos AWE at Austin Kite Festival, South Asians attend
    For over five years, kPower has been a regular part of the Western Hemisphere's Oldest Kite Festival in its hometown of Austin, demoing AWE by varied small prototypes.

    This year kPower featured a 4m2 NPW* harnessed in a crosswind PTO loop and piloted from upwind. Two novice assistants who had never before flown any power kite had no problem flying the rig for long periods. The dummy load was a 4x heavy bungee on its own stake. The load-motion power was very evident to everyone, and a peak gust actually pulled out one of the Ag soil anchors, a rather monstrous feat for a bit of fabric. The session validated new tunings of the rig, which now seems very close to perfection, and even promises to enable Wubbo's SpiderMill in a low-complexity kite-network design.

    The other dramatic development at this historic kite festival is the loud happy presence of a thousand or so South Asians, mainly Indian high tech intelligentsia and families reconnecting with ancestral kite traditions in Austin's weirdly anarchic kite event. I overheard excited memories of authentic kite fighting culture in fine detail, of how the cutting string (manja) is made, how aerial battles are fought. There were even rumors flying among the Western pros, of manja at last years festival cutting down children's kites like mowing grass. 

    Sure enough, as the festival wound down, I spotted an Indian fighter kite flying both higher and at a higher angle than anything else that day, its line glistening with glass powder. "Is that manja!?" I asked a cohort of excited Indians clearly looking-for-a-fight. The flyer grinned and wobbled his head, "A little bit!". Thrilled to see such authentic folkloric kite tradition airborne in Austin, I raised no objection. The flyer was carefully avoiding children's kites, and no doubt would recover any line dropped. His kite outflew everything else because traditional natural materials are expertly applied and expertly flown close to structural limits.

    A kPower 2.5M2 PL SS kPower kite did get cut down that day, not by manja, but by a runaway children's kite. The cheapest line can cut the finest by sawing across it, as a phonon physics curiosity with relativistic motion analogies. Show kite pros must guard their kites nervously at kite festivals, as quite a hostile-environment. AWE designers should be aware of the vulnerability of having their SLK platforms cut down by almost anyone so minded. kPower made some direct connections with Indian kiters, who are excited to hear about AWE and the Indian projects we have followed (KiteMill was perhaps the first to cultivate West-East/US-India AWE partnership).

    ========

    * Expert kiter review of the same fine Born Kites wing: Not just a poor "rag-flapper"; why he gladly gave up his fine foils for NPWs-
    Group: AirborneWindEnergy Message: 25453 From: dave santos Date: 4/6/2019
    Subject: Re: kPower again Demos AWE at Austin Kite Festival, South Asians att
    Correction: "SkyMill" NOT "KiteMill" was intended as a probable first Indian AWE Western partner. Sorry.

    This sort of increasingly common attribution error underscores just how fast and far AWE has grown, from a bare handful of ventures a decade ago, to so many that its an increasing (but welcome) struggle to keep up to date the unfolding story of AWE. Fortunately, the archival record will not saturate nor forget so easily.



     

    For over five years, kPower has been a regular part of the Western Hemisphere's Oldest Kite Festival in its hometown of Austin, demoing AWE by varied small prototypes.

    This year kPower featured a 4m2 NPW* harnessed in a crosswind PTO loop and piloted from upwind. Two novice assistants who had never before flown any power kite had no problem flying the rig for long periods. The dummy load was a 4x heavy bungee on its own stake. The load-motion power was very evident to everyone, and a peak gust actually pulled out one of the Ag soil anchors, a rather monstrous feat for a bit of fabric. The session validated new tunings of the rig, which now seems very close to perfection, and even promises to enable Wubbo's SpiderMill in a low-complexity kite-network design.

    The other dramatic development at this historic kite festival is the loud happy presence of a thousand or so South Asians, mainly Indian high tech intelligentsia and families reconnecting with ancestral kite traditions in Austin's weirdly anarchic kite event. I overheard excited memories of authentic kite fighting culture in fine detail, of how the cutting string (manja) is made, how aerial battles are fought. There were even rumors flying among the Western pros, of manja at last years festival cutting down children's kites like mowing grass. 

    Sure enough, as the festival wound down, I spotted an Indian fighter kite flying both higher and at a higher angle than anything else that day, its line glistening with glass powder. "Is that manja!?" I asked a cohort of excited Indians clearly looking-for-a-fight. The flyer grinned and wobbled his head, "A little bit!". Thrilled to see such authentic folkloric kite tradition airborne in Austin, I raised no objection. The flyer was carefully avoiding children's kites, and no doubt would recover any line dropped. His kite outflew everything else because traditional natural materials are expertly applied and expertly flown close to structural limits.

    A kPower 2.5M2 PL SS kPower kite did get cut down that day, not by manja, but by a runaway children's kite. The cheapest line can cut the finest by sawing across it, as a phonon physics curiosity with relativistic motion analogies. Show kite pros must guard their kites nervously at kite festivals, as quite a hostile-environment. AWE designers should be aware of the vulnerability of having their SLK platforms cut down by almost anyone so minded. kPower made some direct connections with Indian kiters, who are excited to hear about AWE and the Indian projects we have followed (KiteMill was perhaps the first to cultivate West-East/US-India AWE partnership).

    ========

    * Expert kiter review of the same fine Born Kites wing: Not just a poor "rag-flapper"; why he gladly gave up his fine foils for NPWs-
    Group: AirborneWindEnergy Message: 25454 From: benhaiemp Date: 4/6/2019
    Subject: Re: Fort Felker's presentation in AWEC2017
    Such a large rotor area compared to the wing area is also a source of significant drag when the rotors are used as wind turbines.

    The KiteKRAFT option to increase the wing lift makes sense.especially as "...the power increases cubically with CL and decreases only quadratically with CD...".( https://www.researchgate.net/publication/320742362_Drag_power_kite_with_very_high_lift_coefficient ) 

    Group: AirborneWindEnergy Message: 25455 From: dave santos Date: 4/6/2019
    Subject: Mexican AWE Talk mentioned in Tweet
    Some connection with "Holland" on linked twitter feeds, but not much else; cool that in Jalisco state one can attend an AWE talk-

    "Thanks for inviting me to speak about #airborne #wind #energy during #IoT Meetup. It has been a while since I presented some high tech initiative. Great to do it at home in #ConnectoryGDL :-)"
    Group: AirborneWindEnergy Message: 25456 From: benhaiemp Date: 4/6/2019
    Subject: Re: Fort Felker's presentation in AWEC2017
    I deleted two previous messages because of a mistake. Indeed to overcome the drag of the tether, the wing area should be high enough, not the rotor area which is another source of the drag.
    Group: AirborneWindEnergy Message: 25457 From: dave santos Date: 4/6/2019
    Subject: Re: Fort Felker's presentation in AWEC2017
    In [Drag Power Kite with Very High Lift Coefficient, 2017] we have the Makani/Joby/TUD school of AWES design seeking a combined architecture, with Fort and Roland as lead overall researchers in this high-complexity low-TRL concept space, that include a number of me-too small ventures with similar platforms (e-vtol aerobatic flygen).

    As we follow the claims, whoops, Makani's down-select of a monoplane should have been a biplane with complex slatted wings, not just flaps. Once again, power-to-mass is almost wholly disregarded, in this case to favor Cl as the primary figure-of-merit. Not stated is that kites naturally operate "powered up" at high Cl. The real world dominance of soft unslatted mono-wing power-kites is not explained. Critical factors like flygen v groundgen selection, scaling-factors, crashworthiness, and many others, go unmentioned.

    kPower and others are left to bet on ship-kite (scaled-up power-kite) superiority by lower complexity, higher power-to-mass, crash-resistance, lower capital cost per unit-energy, greater scalability, and so on, at comparable high Cl to every other kite wing operating in the semi-stalled regime. The contest is to be ultimately decided in the sky. How theatric that TRL9 ship kite tech has such seemingly-advantaged contenders. The AWE race is clear; to win the ship-kite must effectively drive a generator beyond all hopes the other contenders, who really have had a great run in the early R&D.
    Group: AirborneWindEnergy Message: 25458 From: dave santos Date: 4/6/2019
    Subject: Latest SS Wings by Born Kite
    kPower owns several Born Kite NPWs, with great satisfaction. A previous post noted another kite expert making a similar Born NPW move from foils. Born SS news does not stop there.

    Lately Born has developed a new line of affordable high AR SS wings that put them at the front of soft-kite design. This is my pick for hottest German AWE progress. Yes, we have seen fine pioneering SS wings by top makes, but Born offers fine builds of radically simplified designs at a fraction of the price.

    This is AWE progress in the raw because SS kites are the most scalable kite basis possible, to 1000m2 and beyond, so baby SS progress newly born on the streets of Berlin promises a lot. 


    Weird innovative Born vertical kite bar, depower is everything and the short-lined kite is torqued to turn.



    Another Born-driven trend to watch is flying these wings straight from the bar without added lines. Here is an existence validation of "staked out" proportion long explored here, both short and long lines in video clip-



    Hey, its another kite encampment, a Norway Kite Camp.
    Group: AirborneWindEnergy Message: 25459 From: dave santos Date: 4/6/2019
    Subject: Natural Fibers for Kites Compared with Synthetics
    If we must avoid synthetic polymers for ecological reasons, then natural fibers really can do the job. We can maintain these fibers by traditional means and they will degrade into organic compost. Added cost is offset by enhanced ecological value. Value natural kites more. As Wubbo proposed, we can create the AWE we want, not just take the cheapest greediest route.

    Check out how natural v. synthetics really compare. This link has good natural and synthetic fiber strength data (red dots on plot), where flax has stellar strength, and hemp and cotton also impress.


    "We have done this before."

    Also check out our cotton-kite hemp-string friends at Little Cloud,
    Group: AirborneWindEnergy Message: 25460 From: benhaiemp Date: 4/7/2019
    Subject: Re: Natural Fibers for Kites Compared with Synthetics
    Some plastic films (for example Multilayered Cross Laminated U.V. on https://www.arktarps.com.au/comparison-to-woven-tarps/ ) are said to be 100% recyclable and have  a high lifetime I tested to be several years outdoor. Unfortunately their dimensional stability can be poor for almost kites, excepted perhaps for some static kites, as shown on

    https://groups.yahoo.com/neo/groups/AirborneWindEnergy/conversations/messages/24873 .
    Group: AirborneWindEnergy Message: 25461 From: benhaiemp Date: 4/7/2019
    Subject: Re: Fort Felker's presentation in AWEC2017

    Perhaps the biplane configuration with very high lift coefficient can be reached with soft kites like on https://www.youtube.com/watch?v=Lv04Iu56Ub4 with only two wings as a beginning. An advantage could be  keeping a low turn radius as the power increases.
    Group: AirborneWindEnergy Message: 25462 From: dave santos Date: 4/7/2019
    Subject: Re: Natural Fibers for Kites Compared with Synthetics
    Synthetic polymers ideally recycle, while natural fibers compost. Recycling is industrially preferred, but in the case of kite polymers that end up floating in the air or water, recycling is a lost option, and natural fibers are a healthier input for biological food chains. Natural fibers could enable special kite applications where the kite need not be retained for recycling, perhaps for natural disaster recovery, and novel operations no one has thought of.

    Recycling polymers is not a replacement for special uses of natural fibers, like whale-friendly flotsam. Like many a fringe-wind idea, a natural kite tech is cool and worth trying just to see what happens. Here we add to Gipe's analysis of "freak turbine" design, to glean value from diverse engineering experience, even as we concentrate on mainstem solutions.

    Whale Is Found Dead in Italy With 48 Pounds of Plastic in Its Stomach






     

    Some plastic films (for example Multilayered Cross Laminated U.V. on https://www.arktarps.com.au/comparison-to-woven-tarps/ ) are said to be 100% recyclable and have  a high lifetime I tested to be several years outdoor. Unfortunately their dimensional stability can be poor for almost kites, excepted perhaps for some static kites, as shown on

    https://groups.yahoo.com/neo/groups/AirborneWindEnergy/conversations/messages/24873 ..
    Group: AirborneWindEnergy Message: 25463 From: dave santos Date: 4/7/2019
    Subject: Re: Fort Felker's presentation in AWEC2017
    The evolutionary trend in modern power kites is clear- the '70s pioneers like Culp tended to have one size of kite that they could stack together to add power. Over the decades, single kites in many sizes came to dominate, as kite quivers, where the flyer chose a single best kite. 

    The reasons for single kite optimization are clear- single kites can be matched exactly to conditions and are less fussy to fly, with less to go wrong. Those who fly stacks work harder in launching, landing, and rigging. No one expects a kite stack to win a race against single race kites.

    AWE is unlikely to reverse this trend.



     

    Perhaps the biplane configuration with very high lift coefficient can be reached with soft kites like on https://www.youtube.com/watch?v=Lv04Iu56Ub4 with only two wings as a beginning. An advantage could be  keeping a low turn radius as the power increases.
    Group: AirborneWindEnergy Message: 25464 From: dave santos Date: 4/7/2019
    Subject: Situating Biplane Kite and High Cl Discussion
    Noting that kite "biplane", "multiplane", or "stacks" embody the essential topological structure of Kite Trains, of multiple unit-kites along a single-line or line-set.

    Due to unit-kite scaling mismatch to the largest groundgens, a multi-kite AWES architecture is predicted optimal, but just how best to rig the required network is the hot open question.

    At some point, analytic arguments succeed by a sufficient clarity of relations. Kite Network Theory is slowly coming together by an accumulation of small parts.

    The biplane relation itself is not a first-order relation, but an available state in aviation configuration-space, moving historically from biplane to monoplane.

    High Cl is not a first-order AWES factor either. In our design race, its just another default assumption.
    Group: AirborneWindEnergy Message: 25465 From: dave santos Date: 4/7/2019
    Subject: Re: Situating Biplane Kite and High Cl Discussion

    Regarding the rigid-sparred biplane, as a box-truss box-kite, just as Chanute, Wrights, and eventually Joby adopted it for compressive spar loadings with reduced mass, all this simply does not apply to soft kites, whose wings are span-loaded by tensile forces, so they scale far better.

    At best, rigid biplanes in AWE only marginally mitigate the severe square-cube scaling limit on single rigid wings. The largest rigid-spar kites are in fact monoplanes. Dependence on rigid spars is not the central design space in megascale AWE.


     

    Noting that kite "biplane", "multiplane", or "stacks" embody the essential topological structure of Kite Trains, of multiple unit-kites along a single-line or line-set.

    Due to unit-kite scaling mismatch to the largest groundgens, a multi-kite AWES architecture is predicted optimal, but just how best to rig the required network is the hot open question.

    At some point, analytic arguments succeed by a sufficient clarity of relations. Kite Network Theory is slowly coming together by an accumulation of small parts.

    The biplane relation itself is not a first-order relation, but an available state in aviation configuration-space, moving historically from biplane to monoplane.

    High Cl is not a first-order AWES factor either. In our design race, its just another default assumption.
    Group: AirborneWindEnergy Message: 25466 From: Joe Faust Date: 4/7/2019
    Subject: Kite Network Theory
    Kite Network Theory
    =================
    Dave Santos: 
    " Kite Network Theory is slowly coming together by an accumulation of small parts."
    ==============================================
    Google search over exact title: "kite network theory" on April 7, 2019: 
    No results found for "kite network theory"
    ==============================================
    "kite network" holding many types of interests: 
     5,510 results  on April 7, 2019
    ================================================================ 
    May kite network theory related to AWE flourish.   This topic thread might collect many small and large parts. 
    Group: AirborneWindEnergy Message: 25467 From: Joe Faust Date: 4/7/2019
    Subject: Re: Kite Network Theory

    spinning kite networks inside a lifting kite network


    https://youtu.be/RApNZdCfjrs
    by Windswept & Interesting
    Group: AirborneWindEnergy Message: 25468 From: Joe Faust Date: 4/7/2019
    Subject: Kitefoiling
    Kitefoiling (KF)
    ========================
    • KF in most simple forms is an AWES realm.
    • Hybrid KF for serving practical good is an open realm for development. Visionaries may post AWES KF visions.
    =========================
    Teasing: 
    Article: 
    by Rossland Telegraph on Saturday April 06 2019
    "Kitefoiling is to become a full Olympic sailing event after World Sailing’s (WS) Council approved a submission that will see athletes take the stage at the Paris 2024 Games"
    Group: AirborneWindEnergy Message: 25469 From: Joe Faust Date: 4/7/2019
    Subject: Re: Kitefoiling
    https://www.youtube.com/watch?v=EWLVE65gPQU 

    K2 Kiteboat - High Speed Foiling in Rough Water

     
    Group: AirborneWindEnergy Message: 25470 From: dave santos Date: 4/7/2019
    Subject: Re: Kitefoiling
    Combine kite-foiling with electric foil surfboards, and you have a complete E-AWES as Open-AWE_IP-Cloud thinking.

    Here's DonM doing his bit, but seemingly not making the "e-foil" connection to AWE-

    Jetfoiler






     

    https://www.youtube.com/watch?v=EWLVE65gPQU 

    K2 Kiteboat - High Speed Foiling in Rough Water

     
    Group: AirborneWindEnergy Message: 25471 From: benhaiemp Date: 4/7/2019
    Subject: Re: Kitefoiling
    Attachments :
      See the fourth drawing where the foils (15) allow the annular structure (1) to be above the sea level, saving hydro drag.
      		   @@attachment@@
      Group: AirborneWindEnergy Message: 25472 From: Joe Faust Date: 4/7/2019
      Subject: Re: Kitefoiling
      World largest KFS (kitefoil system)?
      All, post findings on the question as time unfolds. 

      ===
      Group: AirborneWindEnergy Message: 25473 From: dave santos Date: 4/7/2019
      Subject: Re: Kitefoiling [1 Attachment]
      The annular foil shown is a cool idea to raise structure above waves, but there would still be considerable hydrodynamic loss if only power harvesting is intended. A floating railroad track is also interesting, not just to reduce hydro-drag by rolling efficiency*. While these novel ideas do not meet strict criteria of maximum simplicity and performance, they clearly open up new capabilities for us to ponder.

      How about a tower of hyrofoils that rises out of the sea to great height? It could start slow to rise a bit at max drag, and as it lifts more out of the water, pick up angular velocity. The "basement" foils would be just as Pierre has presented.

      --------
      * A small solid wheel on a solid surface in a vacuum is close to 100% superconducting transport efficiency. What could a transport foil do? Betz at most?



       
      [Attachment(s) from pierre-benhaiem@orange.fr [AirborneWindEnergy] included below]

      See the fourth drawing where the foils (15) allow the annular structure (1) to be above the sea level, saving hydro drag.
      Group: AirborneWindEnergy Message: 25474 From: dave santos Date: 4/7/2019
      Subject: Rare NPW-OL Morph (Falken)
      Thanks to Tallak for locating this wonderful SS work. kPower owns a Falken-like two-line kite (plus 2 Culp OLs, 4 NPWs, 2 PL SSs).

      Read the text. Watch the video. There is something extraordinary, ghost-like, in how well a tuned-up rag can fly. The power is monstrous.

      text-


      video-
      Group: AirborneWindEnergy Message: 25475 From: dave santos Date: 4/7/2019
      Subject: Cool Bol and Playsail
      Group: AirborneWindEnergy Message: 25476 From: Joe Faust Date: 4/7/2019
      Subject: Pierre Benhaiem patent portfolio
      Regarding Pierre Benhaiem ::
      Aggregate link for patents {this may not reach all items, but it is robust)
      Group: AirborneWindEnergy Message: 25477 From: dave santos Date: 4/7/2019
      Subject: Re: Pierre Benhaiem patent portfolio
      It is hoped PierreB will add his IP into the Open-AWE_IP-Cloud, which contains more patents and other IP under MOUs, by notables like Bolonkin, Olsen, etc., than any other single player like Makani or KiteGen.

      Its hoped the AWE Cloud IP pool will be bought up in aggregate, like the early aviation Patent Pool, with the intent to limit monopolistic IP domination (releasing the IP for free peaceful use would be ideal). There will be a final approval phase for all the IP small-holders to decide if they are in or out, at what price.

      This may be the best bet for those AWE pioneers who invested heavily in patents to recoup costs and retire in comfort. All patents and CC concepts welcome. While most of the ideas are of marginal inventive leaps, the best should earn a bonus, based on peer review. Some developers might earn a check without even knowing the Cloud existed.

      The AWE IP Cloud remains a venture-capital barrel-of-dynamite that has not yet gone off. I estimate its fair value to be around 100M (GoogleX has blown 300M), plus residual low-margin royalties from future production, but acquisition could go much cheaper as aging developers languish under the glacial pace of aerospace revolution.

      PierreB has a fine IP collection, with key gems in the rough.



       

      Regarding Pierre Benhaiem ::
      Aggregate link for patents {this may not reach all items, but it is robust)
      Group: AirborneWindEnergy Message: 25478 From: Joe Faust Date: 4/7/2019
      Subject: Re: Rare NPW-OL Morph (Falken)
      Falken site clip:
      "Sparless single skin kites speak the loudest to me. Their voice is unmuffled by spars holding skin taunt, or pressured chambers making surfaces smooth. I may have got my start in kite design by emulating other designs, but now most input comes from listening to kites themselves."
      Group: AirborneWindEnergy Message: 25479 From: joe_f_90032 Date: 4/7/2019
      Subject: Re: Rare NPW-OL Morph (Falken)
      Group: AirborneWindEnergy Message: 25480 From: dave santos Date: 4/7/2019
      Subject: Re: Mexican AWE Talk mentioned in Tweet
      Impression of Historic Jalisco-Holland AWE Lecture attached. Now we can get on with life.



       

      Some connection with "Holland" on linked twitter feeds, but not much else; cool that in Jalisco state one can attend an AWE talk-

      "Thanks for inviting me to speak about #airborne #wind #energy during #IoT Meetup. It has been a while since I presented some high tech initiative. Great to do it at home in #ConnectoryGDL :-)"





      		   @@attachment@@
      Group: AirborneWindEnergy Message: 25481 From: dave santos Date: 4/7/2019
      Subject: Bladetips Energy Advancing
      With the extensively tested Alcyone platform, Rogelio Lozano Jr.* aims at a major market for quasi-aerostat capability, in the specific form of AWE-powered HTA persistent flight. If Bladetips gains revenue with Alcyone, that could support major R&D into any AWES direction the company decides. Great team. Good concept and momentum. A company to watch. 


      ---------------
      * He met Rogelio at AWEC2011. He later bench-tested a micro-Mothra at GIPSA-lab, Grenoble, under Hably, and also independently validated kite reverse-pumping to stay aloft.
      Group: AirborneWindEnergy Message: 25482 From: benhaiemp Date: 4/7/2019
      Subject: Re: Cool Bol and Playsail


      https://youtu.be/sfK3Nh5qqHE

      https://youtu.be/6sKXBV8E87E

      The playsail looks to be easy to make: a rectangular tarp with tethers in the corners. Is it stable enough?
      Group: AirborneWindEnergy Message: 25483 From: joe_f_90032 Date: 4/8/2019
      Subject: Re: Bladetips Energy Advancing
      Recall: 
      HTA :: heavier-than-air  (even if slightly heavier, perhaps)
      LTA :: lighter-than air   (often hydrogen or helium involved)          
      Group: AirborneWindEnergy Message: 25484 From: dave santos Date: 4/8/2019
      Subject: Re: Bladetips Energy Advancing
      In common usage, LTA refers to flight-dependence on lifting gas, and HTA refers to all other aircraft. In actual practice, many dirigibles often fly a bit heavy, for various design or operational reasons, and rely on a little aero-lift to maintain or gain altitude.



       

      Recall: 

      HTA :: heavier-than-air  (even if slightly heavier, perhaps)
      LTA :: lighter-than air   (often hydrogen or helium involved)