Messages in AirborneWindEnergy group.                             AWES5556to5605 Page 9 of 440.

Group: AirborneWindEnergy Message: 5556 From: Bob Stuart Date: 1/29/2012
Subject: Re: Tethered system for power generation by Damon Vander Lind, et al

Group: AirborneWindEnergy Message: 5557 From: christopher carlin Date: 1/29/2012
Subject: Re: Tethered system for power generation by Damon Vander Lind, et al

Group: AirborneWindEnergy Message: 5558 From: dave santos Date: 1/29/2012
Subject: Re: Tethered system for power generation by Damon Vander Lind, et al

Group: AirborneWindEnergy Message: 5559 From: roderickjosephread Date: 1/30/2012
Subject: Re: Who is "Professor Crackpot"?

Group: AirborneWindEnergy Message: 5560 From: roderickjosephread Date: 1/30/2012
Subject: Re: LAST CALL- AWEIA USA Response to FAA AWES Policy Notice and Info

Group: AirborneWindEnergy Message: 5561 From: dave santos Date: 1/30/2012
Subject: Re: LAST CALL- AWEIA USA Response to FAA AWES Policy Notice and Info

Group: AirborneWindEnergy Message: 5562 From: Pierre Benhaiem Date: 1/30/2012
Subject: Re: LAST CALL- AWEIA USA Response to FAA AWES Policy Notice and Info

Group: AirborneWindEnergy Message: 5563 From: Doug Date: 1/31/2012
Subject: Re: LAST CALL- AWEIA USA Response to FAA AWES Policy Notice and Info

Group: AirborneWindEnergy Message: 5564 From: Joe Faust Date: 1/31/2012
Subject: A full reverse or opposite of AWES? By Margaret Dye Smith

Group: AirborneWindEnergy Message: 5565 From: dave santos Date: 1/31/2012
Subject: Re: LAST CALL- AWEIA USA Response to FAA AWES Policy Notice and Info

Group: AirborneWindEnergy Message: 5566 From: dave santos Date: 1/31/2012
Subject: Re: Tethered system for power generation by Damon Vander Lind, et al

Group: AirborneWindEnergy Message: 5567 From: Doug Date: 2/1/2012
Subject: Re: LAST CALL- AWEIA USA Response to FAA AWES Policy Notice and Info

Group: AirborneWindEnergy Message: 5568 From: Doug Date: 2/1/2012
Subject: Re: Tethered system for power generation by Damon Vander Lind, et al

Group: AirborneWindEnergy Message: 5569 From: dave santos Date: 2/1/2012
Subject: Re: LAST CALL- AWEIA USA Response to FAA AWES Policy Notice and Info

Group: AirborneWindEnergy Message: 5570 From: dave santos Date: 2/1/2012
Subject: +99% polymer mechanical transmission efficiency (Marks Standard hand

Group: AirborneWindEnergy Message: 5571 From: Joe Faust Date: 2/1/2012
Subject: News release from KiteGen world

Group: AirborneWindEnergy Message: 5572 From: Joe Faust Date: 2/1/2012
Subject: Re: Climbing Kites in Calm CKC

Group: AirborneWindEnergy Message: 5573 From: Doug Date: 2/2/2012
Subject: Re: +99% polymer mechanical transmission efficiency (Marks Standard

Group: AirborneWindEnergy Message: 5574 From: dave santos Date: 2/2/2012
Subject: Re: +99% polymer mechanical transmission efficiency (Marks Standard

Group: AirborneWindEnergy Message: 5575 From: Dan Parker Date: 2/3/2012
Subject: neat stuff

Group: AirborneWindEnergy Message: 5576 From: Joe Faust Date: 2/3/2012
Subject: Re: neat stuff

Group: AirborneWindEnergy Message: 5577 From: Joe Faust Date: 2/3/2012
Subject: Discuss new video of NASA AWES

Group: AirborneWindEnergy Message: 5578 From: Joe Faust Date: 2/3/2012
Subject: Re: Discuss new video of NASA AWES

Group: AirborneWindEnergy Message: 5579 From: Joe Faust Date: 2/3/2012
Subject: Peter Lynn aims for kite sailing craft developments

Group: AirborneWindEnergy Message: 5580 From: Joe Faust Date: 2/4/2012
Subject: Pausing while TACO is cooking

Group: AirborneWindEnergy Message: 5581 From: Joe Faust Date: 2/5/2012
Subject: Re: Pausing while TACO is cooking

Group: AirborneWindEnergy Message: 5582 From: Joe Faust Date: 2/6/2012
Subject: TACO

Group: AirborneWindEnergy Message: 5583 From: Doug Date: 2/7/2012
Subject: ? FAA Radar to be replaced by GPS soon ?

Group: AirborneWindEnergy Message: 5584 From: Joe Faust Date: 2/7/2012
Subject: FAA is still open for comment after February 6, 2012

Group: AirborneWindEnergy Message: 5585 From: Dan Parker Date: 2/7/2012
Subject: Re: Can you help me write this up?

Group: AirborneWindEnergy Message: 5586 From: roderickjosephread Date: 2/7/2012
Subject: hydrogen piezo lighting self destruct

Group: AirborneWindEnergy Message: 5587 From: roderickjosephread Date: 2/7/2012
Subject: Re: TACO

Group: AirborneWindEnergy Message: 5588 From: Bob Stuart Date: 2/7/2012
Subject: Re: Can you help me write this up?

Group: AirborneWindEnergy Message: 5589 From: Dan Parker Date: 2/7/2012
Subject: Re: Can you help me write this up?

Group: AirborneWindEnergy Message: 5590 From: Joe Faust Date: 2/7/2012
Subject: Re: TACO

Group: AirborneWindEnergy Message: 5591 From: Joe Faust Date: 2/7/2012
Subject: Kite systems for agricultural applications?

Group: AirborneWindEnergy Message: 5592 From: Joe Faust Date: 2/7/2012
Subject: Will AWES be receiving N numbers from the FAA?

Group: AirborneWindEnergy Message: 5593 From: Joe Faust Date: 2/7/2012
Subject: Re: Kite systems for agricultural applications?

Group: AirborneWindEnergy Message: 5594 From: dave santos Date: 2/8/2012
Subject: Solution to FAA Required Tether Conspicuity for Crosswind AWES

Group: AirborneWindEnergy Message: 5595 From: roderickjosephread Date: 2/8/2012
Subject: Re: Solution to FAA Required Tether Conspicuity for Crosswind AWES

Group: AirborneWindEnergy Message: 5596 From: dave santos Date: 2/8/2012
Subject: Re: Solution to FAA Required Tether Conspicuity for Crosswind AWES

Group: AirborneWindEnergy Message: 5597 From: roderickjosephread Date: 2/8/2012
Subject: Re: Solution to FAA Required Tether Conspicuity for Crosswind AWES

Group: AirborneWindEnergy Message: 5598 From: Doug Date: 2/9/2012
Subject: Re: Solution to FAA Required Man Carrying a Lantern for Crosswind AW

Group: AirborneWindEnergy Message: 5599 From: Joe Faust Date: 2/9/2012
Subject: Fossil RAT multitasking on kite

Group: AirborneWindEnergy Message: 5600 From: dave santos Date: 2/9/2012
Subject: Re: Fossil RAT multitasking on kite

Group: AirborneWindEnergy Message: 5601 From: blturner3 Date: 2/10/2012
Subject: Re: Solution to FAA Required Man Carrying a Lantern for Crosswind AW

Group: AirborneWindEnergy Message: 5602 From: dave santos Date: 2/10/2012
Subject: Re: Solution to FAA Required Man Carrying a Lantern for Crosswind AW

Group: AirborneWindEnergy Message: 5603 From: dave santos Date: 2/10/2012
Subject: Advanced Tarpauline Kites (Megascale Rope-Loadpath Method)

Group: AirborneWindEnergy Message: 5604 From: Joe Faust Date: 2/10/2012
Subject: Flip Wing studies folder open for inputs to evolve

Group: AirborneWindEnergy Message: 5605 From: Joe Faust Date: 2/10/2012
Subject: Irish Navy




Group: AirborneWindEnergy Message: 5556 From: Bob Stuart Date: 1/29/2012
Subject: Re: Tethered system for power generation by Damon Vander Lind, et al
AFAIK, the standard flutter detector is still the test pilot, who backs off at the first sign of it and tells the fitters to get it out of their flight envelope before the next test.  There are design guidelines, and handy prophylactic features, but a coat of paint can throw things off.  

Bob Stuart
Sent from The Country Formerly Known as Nice.

On 29-Jan-12, at 2:44 PM, blturner3 wrote:


Group: AirborneWindEnergy Message: 5557 From: christopher carlin Date: 1/29/2012
Subject: Re: Tethered system for power generation by Damon Vander Lind, et al
A couple remarks.

From what I understand of SkySail they have a sensor package in place. Not sure whether it's in the mount or flown.

Flutter, as the term is used in the aircraft business, is by definition a divergent oscillation which leads almost instantly to catastrophic failure. I suspect what you are referring to is a sustained oscillation which is not necessarily catastrophic - at least in the short term. It might be useful to clearly define exactly what you're referring to and if it isn't the airplane definition consider giving it a different name. Buzz, luffing and buffet come to mind.

Regards,

Chris 
On Jan 29, 2012, at 8:44 PM, blturner3 wrote:


Group: AirborneWindEnergy Message: 5558 From: dave santos Date: 1/29/2012
Subject: Re: Tethered system for power generation by Damon Vander Lind, et al
There is no major "inventive leap" in this disclosure; the test of a great patent. This seems merely to be the claiming of an ad-hoc system design, which is no threat to the rest of us. It does provide a window into specific Makani design weaknesses. The dependence on embedded PCs, FPGAs, (and maybe even Java, still ), pitot tubes, etc. all suggest prototype expedients, rather than an architecturally clean and reliable end design. At least pitot-tubes offshore escape the mud-dauber wasp hazard, but FPGAs bit-flip from solar neutrons or cosmic rays, and embedded PC is hardly the gold standard of safety-critical processing. The tether-tension sensor gave a moment's worry; it is possibly essential, but can we prove its prior-art or obvious? Then i remembered everybody and their grandmother used tether-tension sensing as part of foundational power-curve assessments. I wish i could show these kids what an elegant robotic architecture looks like; the process flows are all combed out into a unidirectional parallel-loop structure, for ease and clarity of state-machine analysis.
 
We can stop wondering whats-up with the world's Patent Offices; given the flood of filings, they have thrown up their hands in despair and no longer vett patents carefully. Most countries freely rubber-stamp patents and "advanced" countries are hardly hobbling themselves by maintaining traditional reviewing standards. No do we expect the courts to adjudicate all the claims, its just too much. The new globalized reality is contending pools of untested patents, with giant deals based on purely statistical assumptions. As the global Open-Source and CC IP community, we get to be a big fish by pooling small-holder patents, and may even end up the top shark in the world tank. Organizing this patent pool is a role for AWEIA to aspire to, with eventual pool buy-outs by governments a possibility, along the historic aviation model.
 
Five years ago, a very small circle of us totally freaked at the possibility of an AWE blocking-patent monopoly. Now it looks as if we actually succeeded in removing this direct threat by a combination of heroic prior-art discovery and shared inventive leaps. No one deserves more credit than Joe in rethinking tethered flight and digging up the prior-art that seems to ensure end-to-end open-source AWE that no IP law firm or court can reverse. This is a green-light to future investment. A greedy actor like Google can still go on an AWE patent buying spree, but with no monopoly-lock possible on the sky, it may be a losing proposition.
 
 
  
Group: AirborneWindEnergy Message: 5559 From: roderickjosephread Date: 1/30/2012
Subject: Re: Who is "Professor Crackpot"?
Well, if the title is going spare...
Can I have it?
Imagine the marketing potential, "Buy a Professor Crackpot original generator kite"... WOW

However, I'd have to have a solid licensing agreement on the use of the name from Doug.

I always wanted to be a mad scientist inventor.
I can do a really good vacuous transfixed glare.
But one trick probably doesn't earn me the title.
Group: AirborneWindEnergy Message: 5560 From: roderickjosephread Date: 1/30/2012
Subject: Re: LAST CALL- AWEIA USA Response to FAA AWES Policy Notice and Info
Dave Santos,
I fully trust and support your submission (TACO1.0) as a Response to FAA AWES Policy Notice and Information Request.

I believe this cooperative model has good intentions.
It is well reasoned, unbounded and forward thinking.

I sometimes struggle to believe you are not either a robot / a team of super computers / or a secret govt agency cloaking device...

but just this time ... I'm going to trust you to submit this response on my behalf. If the FAA cock up, I'll know you're a robot.
Group: AirborneWindEnergy Message: 5561 From: dave santos Date: 1/30/2012
Subject: Re: LAST CALL- AWEIA USA Response to FAA AWES Policy Notice and Info
Thank You Roddy, for the vote of confidence. TACO1.0 represents two years of lead work in the service of the RAD goal.
 
A notice about AWEIA and AWEIA USA is needed for those wondering about the precise legal status of these organizations and their relation to TACO. Legally these are early-stage Voluntary Associations that are not yet well formalized, but are rightful under US Constitutional Law and the UN Universal Human Rights Declaration, under the principle of Freedom of Association. TACO is similarly a rightful expression of the respective freedoms of Free Speech.
 
A minor concern has been raised as to whether such associations have the status of legal persons able to respond to the FAA's call for input on AWE. Therefore TACO is being formally submitted to the Federal Docket under my name, as a US citizen and its primary author. No other change is being made, and the document remains a key AWEIA International USA Chapter living document.
 
Another more serious concern raised about TACO is that it not be presented as representing all AWE players. It will be noted in TACO that a small faction of the AWE community strongly objects to working cooperatively with the FAA toward a rapidly approved but rigorous regulatory framework focused on safety. Established practice or semantic usage of "consensus standards" in aviation (and in TACO) should not be misconstrued as an imaginary political consensus of the AWE R&D community, but only within the specific consensus tradition of those who create professional aviation standards.
 
 
daveS

 
  
Group: AirborneWindEnergy Message: 5562 From: Pierre Benhaiem Date: 1/30/2012
Subject: Re: LAST CALL- AWEIA USA Response to FAA AWES Policy Notice and Info
DaveS,

Thanks for your work to make of AWES a branch of the aviation across
FAA.With my agreement among others I presume.

PierreB

--- In AirborneWindEnergy@yahoogroups.com, dave santos <santos137@... wrote:
before its posted to the US Federal Docket next week. You don't have to
be a formal member of AWEIA, since membership is open anyway; nor do you
need to be a US citizen, as the standards that emerge will impact global
stakeholders. This is a good way to make any essential technical point
without the hassle of a separate submission.
Group: AirborneWindEnergy Message: 5563 From: Doug Date: 1/31/2012
Subject: Re: LAST CALL- AWEIA USA Response to FAA AWES Policy Notice and Info
Dave S.
Thanks for putting a lot of effort into trying to pave the way for all of us. The only thing I might note is that you're implying that we all either agree with everything you've put together, or we "strongly object to working cooperatively with the FAA".

You don't leave any room for someone who understands that we need airspace rules, but is also perhaps not in 100% agreement with everything you're sending.

I remain convinced, because of many years in wind energy, seeing the hundreds and even thousands of (unworkable) "new ideas", now echoed in wishful airborne versions, that the current crop of "wannabe AWE" is not anywhere near "ready for prime-time" and in fact probably represents early false roads that will only be recognized later.

Crafting too many rules, that are too specific, now, risks inadvertently self-sabotaging our own efforts.

Additionally, I believe the level of actual AWE activity, in the sense of the number of experimental AWE systems that are actually run at heights that could concern the FAA, or affect aviation, in areas near airports etc. where anyone would even notice, are so EXCEEDINGLY small that they are an insignificant factor in aviation and can be ignored at this point in history.

I'll venture that on any given day, kiteflyers break FAA rules, and nobody notices or cares. Here in the desert, if you actually stop at stop signs, people would think you were a little off. Sure you slow down and show respect for the idea that it's an intersection, but completely stopping, for nobody, gets kinda silly after a while.

Not only that, but from what I've seen of the FAA comments, I get the impression that they either don't understand Superturbine(R), or they've never seen it, or they were talking about something else. There is no jacket in which the shaft rotates. I've had a lot of people who just glance at the pictures think that, and I ask them, if there were a continuous, non-rotating jacket, how could the propellers be attached through the jacket? Oh, and what good would the jacket do besides add weight?

Anyway, I guess you could summarize my opinion below, if you want to include it in your TACO. Hey is it time to eat yet? :)

"I remain convinced, because of many years in wind energy, seeing the hundreds and even thousands of (unworkable) "new ideas", now echoed in wishful airborne versions, that the current crop of "wannabe AWE" is not anywhere near "ready for prime-time" and in fact probably represents early false roads, that will only be recognized later.

Crafting too many rules, that are too specific, now, risks inadvertently self-sabotaging our own efforts.

One proposed rule I've seen, for example, specifies a single tether anchor point. Which would be fine, except if the key to AWE turned out to be multiple tether anchor points.

Additionally, I believe the level of actual AWE activity, in the sense of the number of experimental AWE systems that are actually run at heights that could concern the FAA, or affect aviation, in areas near airports etc. where anyone would even notice, are so EXCEEDINGLY small that they are an insignificant factor in aviation and can be ignored at this point in history.

Nonetheless, I hope that whatever rules are drafted will leave as much freedom as possible to develop what could possibly be a significant future power source for the U.S. and for the world."
:)
- Douglas Selsam
(Winner 2008 Popular Science "Invention of the Year"
for "Sky Serpent", a simple, easy-to-build, stable, flying wind turbine with 25 propellers.)



Group: AirborneWindEnergy Message: 5564 From: Joe Faust Date: 1/31/2012
Subject: A full reverse or opposite of AWES? By Margaret Dye Smith

Kite flying method, assembly and device

 Margaret Dye Smith

Claimsh


Application number: 12/459,504
Publication number: US 2011/0001012 A1
Filing date: Jul 3, 2009

[[This seems to be a direct opposite of AWES]]
Click image for full instruction and more images: 
Discuss claims and uses:
Start: 
1. Display window:  "This is the opposite of the AWES !"
2. ?
Group: AirborneWindEnergy Message: 5565 From: dave santos Date: 1/31/2012
Subject: Re: LAST CALL- AWEIA USA Response to FAA AWES Policy Notice and Info
Thanks Doug, for the good input, and TACO will reflect your specific points (like the spectrum of opinions).
 
TACO attempts to avoid ANY new rules for AWE, instead the goal is to clearly relate specific existing rules to AWE wherever thay have a sound applicability, so that the FAA and everbody else can proceed quickly with high confidence.
 
So existing civil engineering and structural codes can be applied to anchors, fire codes to ground stations, and electrical codes to power hardware. Air regulations based on mass, velocity, and altitude apply mostly as-is. Specialty systems like avionics would meet existing standards for risk, with risk-assessment related to external factors like populations, weather conditions, etc..
 
TACO calls for self-regulation and aviation consensus-standards by existing associations, including EAA, AOPA, AMA, AKA, and possibly AWEIA. It also calls for AWEA (voluntary) standards for windpower performance testing and certification. The handful of AWE specific rules are not onerous intrusive mandates, but just common kite sense, like the simple kite-killing capability every kite-surfer's life already depends on. The high-voltage sky tether is an example of new feature to safety-validate, and these are left as open issues to resolve.
 
Perhaps the most controversial suggestions in TACO relate to mishap reporting, as weak start-ups will consider mishaps as negative corporate information, rather than as potentially life-saving knowledge events. The hope is that those seen to honestly report hazards will have a commercial advantage, based on the warm respect of experts.
 
TACO raises objections to extended FAA temporary restriction of basic methods like farms and multi-tethers, but the objections are respectful and based on logic, which is how the Air Rules dance is played. If the Agency dared to dig-in over any unreasonable demand, we would have their head to display on a pole, politically, so they won't. Its up to us to make our case well, and stick to it, when the occasional conflict over acceptable practice arises.
 
TACO ultimately is a declaration to the FAA and the world that we are aviation professionals (aero-engineers, pilots, instructors, mechanics, riggers, etc,) ready to responsibly share airspace with all other users. It will be mostly our duty as self-regulators to deal with bad ideas and irresponsible actors, and help bring them up to standard, rather than forcing the FAA to micromanage us.
 
TACO's standards are intended to be the highest standards of AWE practice, with no sleazy short-cuts or compromises on safety-culture. We now face the most dangerous phase of R&D.  There will be spectacular accidents that bring scrutiny on us all, and some of us will likely be killed in the quest, as anyone who flies big powerful kites is aware. TACO is to preserve these lives as much as possible.
 
daveS
Group: AirborneWindEnergy Message: 5566 From: dave santos Date: 1/31/2012
Subject: Re: Tethered system for power generation by Damon Vander Lind, et al
Dear Damon, Becker, and Corwin,
 
Giving your patent a last look-over before closing the document, it struck me that the flow diagrams may be concious attempts to monopolize fundamental AWES control processes. This is how software patents are sought, even as the required standard for such claims daily grows higher, due to rampant abuses. In this case, the flow diagrams represent the sort of obvious expedients any working automation engineer routinely employs. Many AWE R&D teams employ the same sort of control logic, but without trying for blocking patents.
The unknown threat is how low your Makani/Joby/Google equity investment circle will go to wrongly enforce a growing AWE minefield-patent portfolio. These sorts of patents are all that rich and determined patent trolls need to muddy early AWE industry waters, and even drive honest AWE developers out of business. If only your circle would clearly reject the profiteering AWE venture model, and gift the patents over to the public domain, you would be acclaimed  as open-source heroes. Instead, you must live under the ethical cloud that exists over such filings.
 
Perhaps we missed some huge "inventive leap" here, and you can point it out to us. Maybe you can somehow reassure the AWE R&D community, and general public, that these patents will never pose a patent-troll threat. If so, Thank You.
 
Respectfully,
 
dave santos
KiteLab Group
AWEIA Member 

 
  
Group: AirborneWindEnergy Message: 5567 From: Doug Date: 2/1/2012
Subject: Re: LAST CALL- AWEIA USA Response to FAA AWES Policy Notice and Info
Near our previous "world headquarters" in Fullerton, I considered us fortunate to be a couple miles from a 50,000 Watt transmitter-tower for the most popular radio station in the U.S., KFI. At least you knew you could find the signal! One day the signal stopped. The tower was right on the approach to Fullerton Airport, and a couple had flown their private plane into a guy wire near the top, and brought down the whole tower. Both people were killed and they had to build a new tower.

I'm sure it's not the first time. Funny but I never heard about a blight on the art of broadcasting. And why is it that nobody cares how many people are killed in tragic accidents in the U.S., as long as it is in cars - hey it's their own fault, right? And we all take a collective risk that beats the risk of using horses, right?

When we build a hydroelectric dam, we assume there could be fatalities in the construction. When we mine or drill for oil, we know people will lose their lives along the way. Apparently, we tacitly decide together that the benefits outweigh the losses. If AWE ever advances to the point that it has accidents or crashes that hurt anybody, at that point it will also hopefully start to become apparent whether there are any benefits to AWE (such as cheap electricity) that would outweigh the cost in both capital and lives that accompany any major thrust of human endeavor.

Tall structures are an increasing feature of our landscape, and aviation needs to figure out a way to handle it.
How 'bout if we make a rule that any airborne wind energy system must have kite-killing capability... then watch the answer turns out to NOT use kites at all! Remember that mandatory caboose and union brakeman on the Wright Flyer?

Hey I keep trying to point out, cloth sails in wind energy and aviation are old concepts that have been superseded, for the most part. But that might not stop me from trying a kite since they are fun and easy. I grew up making my own kites but have not tried it since I was in Indian Guides.

Group: AirborneWindEnergy Message: 5568 From: Doug Date: 2/1/2012
Subject: Re: Tethered system for power generation by Damon Vander Lind, et al
***********************************************************
A patent must describe the invention with sufficient detail that an average practitioner of the art can construct a working model from the information in the patent without undue experimentation.
***********************************************************

Group: AirborneWindEnergy Message: 5569 From: dave santos Date: 2/1/2012
Subject: Re: LAST CALL- AWEIA USA Response to FAA AWES Policy Notice and Info
Doug,
 
When i was a kid, cars had no seat belts, tires "blew", no safety-glass, the steering column was a death-pike, and so on. Many innocents (like my great grandparents)  died unnecessarily. Today cars have shoulder belts, airbags, etc., highways have many safety features, and the driving mortality rate is way down. No one would now consider a car acceptable without safety built in.
 
General aviation is still more dangerous than driving, but commercial transport is statistically safer than a home bathtub. Such amazing safety was driven as much by business need as by political agitation. A wrongful passenger-transport accident can cost many billions in direct liability.
 
Waiting for the body count to start in AWE before adopting a mature aviation safety-culture is risky business, even just from an affordable insurance perspective. California in particular has criminal penalties for product developers who cut corners on product safety,
 
daveS 

Group: AirborneWindEnergy Message: 5570 From: dave santos Date: 2/1/2012
Subject: +99% polymer mechanical transmission efficiency (Marks Standard hand
19th Century rope-driving reached 90% efficiency with natural fibers. How efficient has modern "rope driving" become? The old multi-rope drives evolved into rubberized drive belts with embedded superpolymers, and cogged designs now rate at 96% median efficiency in service and up to 99% measured efficiency, with almost all the 1% loss due to bending hysteresis and friction at the sheaves. We can expect our mechanical transmission kitelines to have the same inherent efficiency, and with less loss due to aerodrag, and less mass-aloft, compared to standard electrical conductors. Good old Marks' Handbook (8th ed.)-
 
www.cptbelts.com/pdf/misc/energy_loss_and_belt_efficiency.pdfSimilar
File Format: PDF/Adobe Acrobat - Quick View
Marks Standard Handbook for Mechanical Engineers,. 8th ed., T. Baumeister, Ed. , McGraw-Hill, New York,. 10. “Mechanical Efficiency of Power Transmission ...
Group: AirborneWindEnergy Message: 5571 From: Joe Faust Date: 2/1/2012
Subject: News release from KiteGen world
Group: AirborneWindEnergy Message: 5572 From: Joe Faust Date: 2/1/2012
Subject: Re: Climbing Kites in Calm CKC
Continuing, some notes and opportunities on giving potential energy to wings aloft for launching and continuing flight during wind changes, lulls, or underpowering:  

1. In our forum links sections, there is now a folder ready to receive anyone's related links:
Folder Launch by step towing 
Put potential energy into wings by using step towing or phased tugging combined with smart glide control during non-powered tug phases. Two methods: 1. Fixed-position winch. 2. Moving winch. And add bi-directional phase towing. 

2. The hang glider pilot may be replaced with a smart servo receiving commands from ground base. 

3. See the bi-directional stepping article linked in the folder. 

4. The Faust described bi-directional in our group messages and the Santos tri-tether phased tug flying are related matters. 

As anyone make contributions in such launching or/and lull handling flight maintenance with AWES intent, please add links to the folder and share tech and experience and safety-critical matter in forum.  Thanks! 

PS: The question comes up on how these matters might be treated in TACO.

JoeF
Group: AirborneWindEnergy Message: 5573 From: Doug Date: 2/2/2012
Subject: Re: +99% polymer mechanical transmission efficiency (Marks Standard
Experience has shown belt drives to wear out too quickly in wind energy and not provide sufficient positive control for safety and also the efficiency is apparently low, so the result of many years experience is that belt drives are not used in wind energy. :)

Group: AirborneWindEnergy Message: 5574 From: dave santos Date: 2/2/2012
Subject: Re: +99% polymer mechanical transmission efficiency (Marks Standard
Airborne Wind Energy probably won't use belts either; this data was just to suggest the high efficiency potential of rope transmission of power. Tower turbines are far more robust than AWES, but they can't fly up into better Upper Wind. To tap that wind, we have to live with super-polymer rope as the current main option (electrical conductors are also popular).
 
The old rope-driving manual gave many years ( drive. 
 
    
Group: AirborneWindEnergy Message: 5575 From: Dan Parker Date: 2/3/2012
Subject: neat stuff
Group: AirborneWindEnergy Message: 5576 From: Joe Faust Date: 2/3/2012
Subject: Re: neat stuff
That is neat!   Such will affect AWES energy-kite farms as various kite farms develop. 

Found in LIFT this morning: 

===========
The Future is NOW - FLYING SWARM TECHNOLOGY!! - Nano Quadrotors!   The controls and logic involved will affect hang gliding, kiting, gliding, AWES, and more.  Energy-kite farms will be affect by such control-flight directions.   Thanks for the lead that SpiralAirfoil gave on this video.
===========
Group: AirborneWindEnergy Message: 5577 From: Joe Faust Date: 2/3/2012
Subject: Discuss new video of NASA AWES

NASA LaRC | Airborne Wind Energy Harvesting 

Caption at YouTube:   (Feb. 2, 2012)
At Langley, we're not just working on innovative solutions for today. We're also looking ahead at the technical challenges we'll all face in the future. The purpose of the Center Innovation Fund is to stimulate and encourage creativity and innovation within the NASA Centers in addressing the technology needs of NASA and the nation. Funds are distributed to each NASA Center to support emerging technologies and creative initiatives that leverage Center talent and capabilities. 
==============================================
Listen and watch. 
Discuss?
Group: AirborneWindEnergy Message: 5578 From: Joe Faust Date: 2/3/2012
Subject: Re: Discuss new video of NASA AWES
Transcript I made by listening to the video of this topic thread.  The bold is a way to show MM's emphasis of voice.
===========================
Airborne Wind Energy Harvesting
Mark Moore & David North
MM:
What this study is looking at is a brand new way of capturing wind energy, and that is through airborne wind platforms. Harvesting platforms that are up in the sky and able to capture much faster winds that are much more consistent. 

DN: 
Coming out of Mark's study--systems study-- in 2010, we wanted to actually move into a phase where we were actually building prototypes and getting test data.  The idea is to have NASA engaged in the technology development and then bring those technologies up to a certain readiness level to be able to push this out into the commercial sector. We are trying to do it in areas where we think NASA can really make a contribution, specifically aerodynamics and control.  Just having access to some of the resources here at Langley--like our model shop and the fabrication technicians over there has been very important.   The students themselves bring another perspective to it; and they come up with ideas that I never even thought of.  

We currently have a 2 kW demonstrator; and I would like to move up to, maybe, the 10 to 20 kW range. So, my goal for the project is to develop a next generation demonstrator that is in a little higher power range. 

Our current demonstrator just calculates the power produced by velocity of the tether and the force in that tether; we have been measuring it through line speed and tension.  But our next phase is to look at converting it to actual electrical power.

    Right now, we are using a two-line kite. In the next phase, we are looking at single-line configurations where we have onboard flight control where we can use one tether line and flaps or rudders on the vehicle to steer the kite. 

    NASA can also use these technologies for other applications like space exploration; so, we are trying to look at applications of airborne wind for platforms that would be used for Mars exploration. 
=========== 
End of video transcription. 
[[Any transcription errors are mine.   I double-checked the phrases.   JoeF]]
Group: AirborneWindEnergy Message: 5579 From: Joe Faust Date: 2/3/2012
Subject: Peter Lynn aims for kite sailing craft developments
Group: AirborneWindEnergy Message: 5580 From: Joe Faust Date: 2/4/2012
Subject: Pausing while TACO is cooking
For those not working on TACO: 


Group: AirborneWindEnergy Message: 5581 From: Joe Faust Date: 2/5/2012
Subject: Re: Pausing while TACO is cooking
TACO is still cooking.   Many are in the kitchen. 
Those here are served some pause (click through image)



Group: AirborneWindEnergy Message: 5582 From: Joe Faust Date: 2/6/2012
Subject: TACO
In some days the TACO will show among many public submissions to the FAA's document on AWES. 
The TACO was entered this evening, February 6, 2012.   It takes time for the TACO to show among the entries at HERE. 

Here is our copy of the HTML document sent: 

Congratulations to all those who have in the recent two years contributed to the TACO generation.  The TACO is one comment among several public submissions (over 12) and is just a beginning. There may be fully confidential comments entered to the FAA about which I've no data.  Anyone many enter comment before midnight (eastern USA time zone).

Special thanks must go to Dave Santos for his careful collecting of comments from many workers in this forum and beyond this forum.  His research and composition is considered by him a rough first level work; see his email address in the TACO for receiving continued notes.   

We all will have opportunity to continue a cooperative and collaborative effort with the FAA to advance AWES to becoming an integrated good neighbor in the NAS--as we bring on effective, spectacular, and winning AWES industry!

JoeF


Group: AirborneWindEnergy Message: 5583 From: Doug Date: 2/7/2012
Subject: ? FAA Radar to be replaced by GPS soon ?
...heard it on the radio yesterday...
:)
Group: AirborneWindEnergy Message: 5584 From: Joe Faust Date: 2/7/2012
Subject: FAA is still open for comment after February 6, 2012
Seems as though the comment period extends past February 6, 2012. 
I entered a short comment about Michael Cook's entry; full process
of clicks and commenting took less than two minutes. 
Group: AirborneWindEnergy Message: 5585 From: Dan Parker Date: 2/7/2012
Subject: Re: Can you help me write this up?

Submit Your Proposal

We're thrilled that you're interested in using Kickstarter, and we can't wait to hear about your project. Please take a few minutes to tell us about what you're raising funds to create. Thanks!

Kickstarter projects are creative, focused, and well-defined with a clear beginning and end. Please be clear and concise. (750 characters remaining)

Rewards are what backers receive in exchange for pledging to a project. Every project's primary rewards should be things made by the project itself. Other than that, what you offer and how you price it is up to you, but a series of creative and engaging backer rewards is essential. Having a few reasonably priced rewards will help incorporate everybody who's interested in your project, even those only able to contribute $1-$20. (1000 characters remaining)

We don't need a resume or anything, just some relevant links like a website where we might find out more information on you, your work, and/or this project.




 

From: spiralairfoil@hotmail.com
To: boblint@tds.net; dennis@blanchardmachine.com; janepinel@hotmail.com; joefaust333@gmail.com; iavkshtol@gmail.com; r.roy@trombettaelectronics.com
Subject: Can you help me write this up?
Date: Tue, 7 Feb 2012 09:29:41 -0500

Hi Folks,
 
           The is a possible chance for us to enter a program called Kickstater.com. I have started to write up a proposal and thought it prudent to pass it by those close to thye project, hoping to polish it up for maximum impact. I sure could use some help here as I am not very good at writing. Below is what I came up with, if it's not good please let me know what we need to change. Please check out their site.
Thank you.
 
                                                                                                                                                                                                   Dan'l
 
 
 
 
SpiralAirfoil Inc has created a Horizontal Axis Wind Turbine that has a startup speed of 1.5 mph, our aim is to utilize and capture the predominate winds, the most constant winds are between zero to 20 mph after 20 mph the percentage of frequency of winds drop off, meaning a sixty mile an hour wind happens very seldom. I call the 0-20 range the strike zone. The SpiralAirfoil is being designed to handle all wind loads but is specially designed to take full advantage of this strike zone. Most wind turbines wont start up until they reach 7-10 mph loosing much of the early but constant low winds. The SpiralAirfoil is able to work very well in the lightest of winds which are much more constant, meaning through a normal 24 hour day the SpiralAirfoil will produce considerably higher electrical energy load. We have been working on two version as our budget allows, the first being the SandPiper  http://www.youtube.com/watch?v=dO1Ey_d4LUI&list=UUCmSN69JsCLUXLNSmmyrUxQ&index=1&feature=plcp and the Classic "SpiralAirfoil"  http://www.youtube.com/watch?v=4vSD8z4fzNg&feature=related
By designing a wind turbine that is built to take advantage of the most constant usable winds will allow a broader marketing strategy, a market that is outside the range of the traditional tri-blade turbine market.
Group: AirborneWindEnergy Message: 5586 From: roderickjosephread Date: 2/7/2012
Subject: hydrogen piezo lighting self destruct
In many instance AWES would benefit from being lift assisted with lighter than air, extremely flammable hydrogen.

A very rapid flame explosion of my doughnut / any inflated torus / an aerostat ,
That could be a very useful feature in terms of rapid self destruction of airborne capability.

A radio controlled piezo or transformer spark inside an envelope filled with correctly mixed hydrogen and air for lift....

Long chain tethering structure still remains intact if you burst a stack of doughnuts.

Bursting the doughnuts would render the system of attached kites  horrendously unstable and draggy, the chain would rapidly descend.

A control signal to a high end lifting kite informing it that emergency descent mode is in operation.

Some ideas to ponder.
Group: AirborneWindEnergy Message: 5587 From: roderickjosephread Date: 2/7/2012
Subject: Re: TACO
Bit last minute that Joe,
It's still not showing,
Here's hoping TACO isn't overcooked.

Seriously, well done and congratulations to all who added ingredients, mixed,  prepared and rolled it out.

All of the responses  (bar one tiny one)  hold well reasoned foreseeable relevant arguments. 

We're going up there  legitimately.
Group: AirborneWindEnergy Message: 5588 From: Bob Stuart Date: 2/7/2012
Subject: Re: Can you help me write this up?
Shouldn't you try to justify your focus on low wind speeds, since power drops off exponentially, rather than directly?

Bob Stuart

On 7-Feb-12, at 9:32 AM, Dan Parker wrote:


Group: AirborneWindEnergy Message: 5589 From: Dan Parker Date: 2/7/2012
Subject: Re: Can you help me write this up?
Hi Bob Stuart,
 
                I sent this to Joe Faust, Opps, did not intend for this to go to the group, oh well, cats outta the bag. Bob you are correct, the birds claime to fame is its very low start up, that said she still needs to be productive and stable in high winds, ideally up to 125 mph.
 
                                                                                                                                                                                                               Thanks Dan'l
 

To: AirborneWindEnergy@yahoogroups.com
From: bobstuart@sasktel.net
Date: Tue, 7 Feb 2012 13:38:11 -0600
Subject: Re: [AWES] RE: Can you help me write this up?

 
Shouldn't you try to justify your focus on low wind speeds, since power drops off exponentially, rather than directly?

Bob Stuart

On 7-Feb-12, at 9:32 AM, Dan Parker wrote:



Group: AirborneWindEnergy Message: 5590 From: Joe Faust Date: 2/7/2012
Subject: Re: TACO
TACO and now 16 other public submissions are up flying now.
Group: AirborneWindEnergy Message: 5591 From: Joe Faust Date: 2/7/2012
Subject: Kite systems for agricultural applications?
Invited: 
Comments and studies regarding the use of kite systems for agricultural applications.  What are the possibilities?  How smart could the systems be? It seems from the FAA comments that serious attention by aerial-application pilots is being run over AWES. Will mitigation of concerns be a change in that industry by using working kite systems?

Scenarios? 
A huge area needs an application of some chemical over the crops or forest. Presently powered aircraft are used frequently to carry loads of chemicals for applying to vegetation.   Could working kite systems replace some of those powered aircraft?  Non-fueled application by using winds aloft to help application of the agricultural chemicals?

JoeF




Group: AirborneWindEnergy Message: 5592 From: Joe Faust Date: 2/7/2012
Subject: Will AWES be receiving N numbers from the FAA?
Will AWESs be receiving N numbers from the FAA?

Group: AirborneWindEnergy Message: 5593 From: Joe Faust Date: 2/7/2012
Subject: Re: Kite systems for agricultural applications?
http://www.agaviation.org/content/about-agricultural-aviation

NAAA gave comment to FAA on AWES. 

Also, Brian Rau, a former president of NAAA gave formal comment to FAA about AWES.  Brian does not see a happy place for AWES in NAS.


So, 
1. How might AWES and AG Aviation be good neighbors?
2. How might kite systems work to be part of a new AG aviation mix?

JoeF
Group: AirborneWindEnergy Message: 5594 From: dave santos Date: 2/8/2012
Subject: Solution to FAA Required Tether Conspicuity for Crosswind AWES
The FAA requires that a tether be conspicuous the flying public by day or night. AOPA, EAA, and NAAA have all lined up to demand this standard be enforced. Any AWES development team unable to comply is unlikely to advance against this combined opposition.
 
Crosswind AWES seems rather disadvantaged, as the requirement entails large FAA Orange and White banners and marking FAA Red lights of a minimum brightness every fifty feet of tether. Virtually every crosswind team responding to the FAA quetsion over AWES conspicuity expressed a problem with either the added tether aerodrag or how these devices will meet power-needs or cope with winching.
 
A KiteLab Group solution to the single-line crosswind case is Sweeping Stacks of wings, an orange or white wing every 50 ft, with an embedded RAT to drive the lighting. Required conspicuity thus becomes naturally easy and even exceedable. A stack of wings generally develops far more power than a single wing. Stacks have been long known in sport-kite circles as a powerful standard configuration. The wings could stack and unstack at the ground by gripping or releasing* (or hanking on and off) the tether as it is extended or retracted from its winch.
 
Thus the aviation conspicuity "problem" is converted into a synergistic virtue.
 
* A trick common to legacy cable cars.
 
coolIP
Group: AirborneWindEnergy Message: 5595 From: roderickjosephread Date: 2/8/2012
Subject: Re: Solution to FAA Required Tether Conspicuity for Crosswind AWES
Yeah, 
I see no problem with compliance to that visibility standard for a dense stack of rotating rings.

As for the cable car type clamping...  inspiration from that thought thanks Dave.

I don't remember ever having considered using tether clamping radially on the outside or inside edge of the ring bag. Doh
It has so many obvious advantages for rigging, launching and recovery.

And could in all probability, with enough gizmo, be done on a live spinning system.
Group: AirborneWindEnergy Message: 5596 From: dave santos Date: 2/8/2012
Subject: Re: Solution to FAA Required Tether Conspicuity for Crosswind AWES
Roddy,
 
As for clamping on a line with COTS, sailing hardware is our obvious expedient, there are plenty of cam cleats, clam cleats, clutches and jammers to choose from; the simplest light ABS plastic types are particularly suitable and cheap.  In combination with preventer stoppers, shackles, and/or kite-killers, this is a very optimal method.
 
The current kiter's low tech method is to wrap the kiteline about eight times around an Alu carabiner to attach junk, but this hard to do under tension. KiteLab Ilwaco has developed simple bent wire line attachment hardware suited for small systems. These work are more handy and far cheaper than 'biners.
 
The Alpine Butterfly Knot is good for adding attachment loops on a line, the high safety margin required for line nicks allows for the small loss of breaking strength the knot introduces, (replace nicked or abraded sections as they are found, as they act progressively; a quick fix is to tie a Butterfly to isolate damage on the loop created).
 
KIS is King,
 
daveS
 
coolIP

  
Group: AirborneWindEnergy Message: 5597 From: roderickjosephread Date: 2/8/2012
Subject: Re: Solution to FAA Required Tether Conspicuity for Crosswind AWES
Thanks Dave S
Bunny ears is my favourite fun to tie and use knot ... must use it in my kite repertoire.

A prussic or a rolling hitch could be used in a similar fashion..


Group: AirborneWindEnergy Message: 5598 From: Doug Date: 2/9/2012
Subject: Re: Solution to FAA Required Man Carrying a Lantern for Crosswind AW
Is a propeller considered "crosswind"?
Like say the propellers of a SkyWindPower flying wind turbine module?
is SkyWindPower "crosswind", or do they have a category they call "stationary"?

Are they crafting rules around the Makani concept, assuming a kite moving across the sky, dragging a tether with it?
That, to me, is exactly the type of rulemaking ahead of the fact that could prove hazardous to the health of AWE.

Since AWE could be "the answer", such rulemaking now, in the ignorance of not having demonstrated a single economically-satisfactory system, or any true indication of what workable technology could be on the horizon, to cavalierly make rules about it at this stage could slow the development of the human race and could even be the beginning of what could stop the progress of humanity.

Let's see how many people die in car accidents across the globe today as the hand-wringers seek to define and rule a technology that is mostly a hypothetical concept whose true best future form is likely as yet unseen and yet to emerge.

Maybe if they make enough rules they can prevent our emerging art from ever "getting off the ground".

This rule you've described, with the streaming orange flags, reminds me of the old law that any motor vehicle operating at night must have a man with a lantern walking in front to warn people.

You see, safe operation of motor vehicles at night requires that someone walk in front of that vehicle. Today we know that walking in front of a motor vehicle at night is, in itself, a very unsafe practice!

Perhaps similarly to walking in front of a moving truck at night, having such debris on the tether might be identified as hazard #1, for all we know today.
:)
Doug Selsam


Group: AirborneWindEnergy Message: 5599 From: Joe Faust Date: 2/9/2012
Subject: Fossil RAT multitasking on kite

  • William C. Vandegrift  instructs about RATs put to do tasks of very many sorts on a kite system.
     
    Patent number
    : 497393
    Filing date: Aug 29, 1892
    Issue date: May 16, 1893

      
Group: AirborneWindEnergy Message: 5600 From: dave santos Date: 2/9/2012
Subject: Re: Fossil RAT multitasking on kite
WayCool, a True AWES from 120yrs ago, with many neat ideas. The AUX AWT actuation is driven by a spiral-airfoil ancestor, and the resulting wing modulation could in principle drive tug cycles on a ground workcell.
 
There are elaborate Indonesian kite-turbine driven Rube Goldberg-like music and puppet novelties in the World Kite Museum collection. Such folk toys could be centuries old.

Group: AirborneWindEnergy Message: 5601 From: blturner3 Date: 2/10/2012
Subject: Re: Solution to FAA Required Man Carrying a Lantern for Crosswind AW
I have to agree with Doug on this one. His example is further down my list of concerns though. As it's going, AWE will be required to operate in the same areas as ground based wind and everyone will have to "Take our word for it." that it will be better at higher altitudes 24 hours a day. And the most enthusiastic supporter of AWE on this list actually added a reinforcement of that being OK in his comments to the FAA because I brought it up. So much for the free sharing of information benefiting everyone.

Brian Turner

Group: AirborneWindEnergy Message: 5602 From: dave santos Date: 2/10/2012
Subject: Re: Solution to FAA Required Man Carrying a Lantern for Crosswind AW
Brian,
 
What is being prevented is the loss of innocent life by unqualified aerodesigners with poorly designed AWES. The flight regs already prevented this sort of monkeyshines. In fact is the FAA is relaxing existing regs by creating the new AWES flying zones up to 2000'.
 
Anyone to wants to fly a manned kite even higher under existing regs just needs the right training and the right flying location (towed glider regs).
 
Then there is the while rest of the world, which is fifty time bigger than the US by area. The US (and EU's 1/50) will be laboratories for the safest systems, which will then have a formidable commercial advantage by insurability.
 
Also, qualified teams will be getting many other ways to test high-altitude, by use of restricted airspace and judicious use of waivers in remote airspace. Most serious AWES folks are internationally connected and can test anything by going outside the NAS. Mexico, for example, is my natural option from the FAA, if needed, and i am glad to share the connections. We also have great opportunities in places like India, Nigeria, and even Canada, if you like exotic locations.
 
The evolution of cars was never really delayed by a silly flagman requirement, but if it had, we would have a greener planet. With AWE, the conspicuity requirement of course favors KiteLab and similar concepts, and the altitude restrictions clearly favor the best aviators, that's just the Darwinian reality of American aviation business.
 
Folks should also understand how dynamic modern aviation is and what NextGen promises, rather than despair that temporary rules are somehow fixed. Temporary rules can last as little as a few days to maybe a year or two, with lots of loopholes.
 
Who exactly is too lame to meet airspace regs, but smart enough to have solved high-altitude AWES operations? We should know about them, so that the aviation-savvy can defend these unlikely heros against the rigors of the NAS system.
 
daveS
 

  
Group: AirborneWindEnergy Message: 5603 From: dave santos Date: 2/10/2012
Subject: Advanced Tarpauline Kites (Megascale Rope-Loadpath Method)
Simple Tarp-Kites rigged as playsails, have the greatest COTS power-to-cost performance; but also shortcomings, like the crudeness of playsail wing geometry, and short service life of an overworked tarpauline. Better tarp soft-kite designs are a wonderful breakthrough. Few AWES engineering challenges will be so rewarding as perfecting these tarp-kite platforms. What is cooler than a cheap low-tech mega-kite of decent geometry and robustness?
 
The New KiteLab megascale tarp-kite method is to first create a large rope-loadpath structure in a desirable kite geometry (like KiteShip's OL), and hank the many tarps into place between the loadpaths. This way each tarp only experiences its local loading and the loadpaths carry the big accumulated loads. A large powerful Kite-Arch can be made by running a row of tarps along two or three ganglines, like a constrained laundry line (ease the leech-line to tune for high lift). The really great thing about the megascale loadpath method is that the essential "tailoring" of the wing is merely in the length of the cords: A kit can thus consist of just a box of tarps and a set of cords cut to the right dimensions.
 
coolIP
 
--------------------------
 
Notes:
 
A key to to large tarp kites is to control luffing by any suitable combination of the common methods.
 
KitLab's favorite stability method is to fly the kite "staked out" by an anchor circle, and belay it around to match the prevailing wind.
 
Telone is Italian, and Manta, Spanish, for Tarpaulin (AWES news hint).
  
UV resistant tarps with cordage sewn in all around the edge are best. Some high-duty tarps have a sewn-in diagonal belting (webbing), for reinforcement. A similar advantage is by setting a rope X across the tarp to windward, allowing the tarp to billow away from the rope. Alternatively, one can let the sail rest against the rope X (belting best), as long as the shape is acceptable and friction does not cause premature wear. An ancient method is to back up a cheap tarp with a thin plastic netting, as a sort of primitive rip-stop. In fact "stone-age" Maylay style leaf kites use a handmade netting to backup a fragile fabric of tiled leaves.
 
All sorts of tricks are useful. One can "tailor" a tarp with tucks and gathers secured by skewers, tapes, and glues to avoid sewing. Tie-offs can be made anywhere on the tarp with just string and small wood "pebbles" tucked in the fabric. Grommets are cheap and easy to use. For gust compliance, elastic lines can be set to the leech (trailing edge) of a tarp, even just using smaller stretchy nylon cordage in conjunction with low stretch polyester rope run to the luff (leading edge). 
 
KiteLab has built and flown large scrap-kites (made from old tents) that fly shoulder to shoulder with commercial wings. Every year, my old friends (Ortiz/Renteria Kite Kartel) in Austin build a giant kite in half a day from just bamboo and used construction plastic, to usually win the "largest home-made kite" category at the local kite festival. Bamboo kites Japan to Guatemala. Traditional designs would fly just as well with tarp sails as they do with paper and cloth.
 
The largest stock tarps run as large as 10,000sqft; thats far beyond bamboo scaling. The only way to use such a tarp and expect it to last a while is with a full loadpath netting behind it. The advantage of such a monster tarp is in light winds, by its lower weight (by area) and porosity compared to open tilings of smaller tarps (suited for higher winds).
 
A flat floppy rectangle requires some cleverness to make into a great wing. The playsail rig pulls hard, but flies with high drag at a low angle and is prone to luff. A general notion is to modify the flatness with a pleating that sets a good chord-wise curve while pressurizing the billows.
 
 There are endless other tarp variations to discover and test. The design language should be elemental, or one might as well use raw fabric. KiteShip's OL or NPW (NASA Power Wing) are good models for Tarp Kites: If you can get tarps to fly comparably or better, that's awesome.
 
An basic design is a "staked out" rectangular tarp gathered along the leading edge to shorten it, creating a delta plan-form with a suitable chord-wise curvature. A powerful kite arch might consist primarily of tarps rigged into a composite ribbon-arch, with the required longer trailing-edge as a natural feature, and the tarps able to furl by draw-lines, just like curtains draw open.
 
------------old post------------
 
The modern poly tarp is incredibly cheap, as little as a dime per square foot for medium duty UV resistant versions with sewn rope borders and grommets every two feet or so. Value-priced kites run ten times higher by the square foot, mostly as a reflection of lower volume production by higher skilled workers. Quality rigid wings run almost one thousand times the cost of the common tarp, by area. This is why Dave Culp pondered if there was not some way to use tarps for kite energy; the "Village Blue Tarp" AWES concept.
Anyone who depends on tarps as canopies knows that the larger sizes are more vulnerable to blow-out by the concentration of far higher forces. Strangely, tarp prices seem flat across their size ranges, for a given fabric weight, so one can buy a box of many smaller tarps at a comparable price to one larger tarp. The small tarp formats that sell as many as thirty to a box are very easy to individually manage and can be aggregated by setting in a large rope load-path network, a minimal surface with about 30% projected solidity. Furling of the networked kites could be as simple as pulling lines on window blinds. Cheap tarps do require early replacement, but the UV protection that allows a five-year warranty life promises a year or two in AWES service.
The 1500ft or so of tarp to a 150 dollar box is enough lift in a medium breeze to lift about five hundred pounds at low wing-loading. One could lift an adapted 10-50kw HAWT and hundreds of feet of conductor with this amount of wing. A "lift-ready" HAWT payload might look like an airboat rotor on a sleigh-runner. Such a freaky turbine can win by reaching far better wind than a HAWT tower can. One can also imagine lounging aloft under a tarp array like royalty on-the-cheap, the lowest-cost human aviation of all, persistent and renewable.
Cheap pioneering DIY sky-sailing methods are only workable by considerable rigging and piloting skills; they are the opposite of wishful AWES where one merely flips an On switch and walks away. Endless novel experiments in rigging are possible, and the end result may be highly refined purpose-built AWES wing arrays.
coolIP
 
An 1873 French magazine sketch depicts an unattributed South American kite lifting design with three taglines managing a heavy load bag. The kite itself is a large framed rectangle with elaborate eddy flap and rear bridle pennants. Two side pullers hauled on the wing while a third puller had a tag line to the load.
A. M. Clark in 1875 patented what is obviously a PlaySail, a simple rectangular tarp with taglines spreading from it to four pullers, and a payload suspended under the sail. Clive rashly opines that this is "impracticable"; luckily no one told that to those Nebraska kids on YTube ("The Furry [sic] of the Wind"), who totally rocked.
The classic tarp-flying video-
Group: AirborneWindEnergy Message: 5604 From: Joe Faust Date: 2/10/2012
Subject: Flip Wing studies folder open for inputs to evolve
Flip Wing studies and links 
The file is open for advance from notes from anyone.  
Post in this thread or send notes directly to email shown on page. 

Flip wings may be of short span or super long span at aspect ratios from blunt to super thin. 
Powered flip wings are found in aircraft. 

AWES farms have potential for many sorts of roles for kite systems, even besides the major energy-capture role. Just where flip wings will play their roles is a matter to be told in hindsight later. 

Signaling, warning, jiggling, torquing, tower-shield construction, conspicuity tower,  RATs for auxiliary uses, niche workers (lapidary tumbling), ...
Group: AirborneWindEnergy Message: 5605 From: Joe Faust Date: 2/10/2012
Subject: Irish Navy
Irish Navy strongly looking to traction AWES.
The topic may be developed in this thread. 
Once they get the knack of kiting, they just might consider the KitVes  direction or more.