Let's go phi a kite! 
by Darin Selby

CarbonConceptsHDarrieusBrochure.pdf
DarrieusHRotorCarbonConcepts.rtf
DarrieusSelfStartingStudy.pdf
DarrieusStraightBladedwepower.pdf
HDarrieusSelfActing.pdf
HDarrieusSelfStarting.jpg
HDarrieusTASSA.pdf
KiteMarctrans.jpg
baden_powellmanlifterkite2.jpg
dualballoonwindenergyharvester.jpg
gophiakite.jpg
kitepulleylever25.jpg
kitepulleyleverSM.jpg
trikewing.jpg
tubercletechnology.JPG
tubercletechnology2.JPG
tubercletechnology3.JPG
whalestailwinduprelease.jpg

Here is a new drawing that I wanted to share with you and the group. The hexagonal kite (which has in it the phi ratio), as well as the "dual H-Darrieus" assembly has just been re-drawn. I've placed all of the pertinent information found, into this one email.     [ED: pitch control study.]

It’s a more practical design for the masses than the Whale's Tail, which may someday become an art installation at Burning Man. This new design utilizes two sets of H-Darrieus rotors, that have only two blades each. Here is some background information on it:
http://en.wikipedia.org/wiki/Darrieus_wind_turbine

Instead of needing an elaborate tower to mount it all on, now it's held aloft by a hexagonal lifter kite:
http://www.cradleofaviation.org/exhibits/dream_of_wings/marconi/
http://www.kites.org/tmr/baden-powell_eng.htm
http://www.kiteplans.org/pln_120/
http://people.zeelandnet.nl/kitepassion/Baden.htm

To assemble this very stable kite, and then send it aloft to only 100-200 feet, would probably take as much effort as setting up the family tent! Then, an abundance of electricity can be made.

By changing the design of the contra-spinning "dual H-Darrieus" rotors to have only two blades per unit instead of four, it becomes simpler to assemble, and actually, as I have just discovered, more efficient!

What this wind energy engineer, Doug Selsam, http://www.superturbine.info/    has recently written about, makes a lot of sense. Even though he speaks of propeller blades, I believe that it can also be translated over to H-Darrieus blades as well. Basically, adding more blades than the original two, only leads to more drag:

“I had the veterans telling me how dumb I was to suggest more than 3 blades, per rotor etc., just like beginners do today. I had to listen to the veterans. I remember the day I dropped from 3 blades to 2 per rotor and saw my power increase a LOT. Who knew? I slowly found that the veterans knew a lot that I had no clue of, or just didn't want to believe. One cannot adequately describe the functioning of a high-speed rotor in its power band - it has to be experienced to be believed. (wow!)”

This company, Carbon Concepts, who appear to have a superior design to all other 'Darrieus'-style wind power generators. They do use four blades, but that can easily be edited back to the original 2-bladed system, from the 1921 patent. They also manufacture their own designed electricity generator.  http://www.carbonconcepts.co.uk/

They also are set up to fabricate any shape and contour of a blade that one may require. I was studying their present carbon fiber blade design, and it came to mind that the Ultralight trike wing blade shape, that I've come across, may even turn out to be even more efficient. This wing is shaped in such a way as to most likely increase the leading-edge pull, or lift. (see attachment section^)

Then even experiment with attaching those"bumps” on the leading edge of the bladewings. Why not? It may just turn out to be all that marine scientist, Frank Fish, says that it is. If the Humpback whales are doing it, it must be good, eh? There has to be a particular reason why these tubercles exist on the leading edge of their pectoral fins. And, I believe that he has discovered why. http://rexresearch.com/whalewing/whalewing.htm

They migrate over 5100 miles. These boney tubercles (that’s right, they are part of the bone structure), comb the water, to make it more fluidic, and less chaotic, as it flows over the fin. This means that more of an organized slipstream is created. So too, one might as well place this “Whalepower” technology on the leading edge of each carbon fiber, V-wing shaped blade. And then receive 20% improvements, according to the tests they’ve done.

Here is a review made of Carbon Concepts present-day carbon-fiber blade unit:

"Carbon Concepts, UK based designers of lightweight composite structures, have developed a near silent vertical axis turbine for domestic and industrial use.

The company have developed carbon fibre technology for a variety of industries and applications, and applied their experiences with aerodynamics and composite construction to create an innovative vertical axis turbine which claims to offer an almost silent operation, even at high speed and load.

The vertical axis machines are generically quieter than traditional wind turbines, with the novel design of the blade tips rendering the turbine virtually silent even at the highest speeds. The company do credit outside assistance, with much of the aerodynamic technology being built on the electrical generator and aerodynamic expertise from the University of Durham.
Most of the functionality of the turbine is based around the use of carbon fibre, a material which has added fatigue resistance, with many other vertical turbines having failed through fatigue in similar aluminium structures, according to the company.

Testing has confirmed that, even at high speed and load, the rotor is effectively silent, and attempts to measure the noise of the rotor showed that perceived noise was dominated by the wind and adjacent trees.

The turbine also has a carbon spar made with glass fibre skins, which is required to keep the fatigue levels below the endurance limit, providing a virtually infinite life.”

http://www.carbonconcepts.co.uk/

As powerfully-efficient as Doug Selsam’s multi-rotor system is,
http://www.superturbine.info/  one needs to also consider having a multi-propeller noise factor, which would be much greater than that of an a multi-unit H-Darrieus system.

Granted, it may not even be close to producing the same amount of power-output of this multi-propeller system, yet the trade-off would be its quietness and portability. Four detachable Carbon fiber V-shaped bladewings, and two rotating hubs, with an electricity generator in-between, with a slipring assembly below it.
http://www.tradeindia.com/Seller-1964440-2421458-1023-CATALOGS/Machinery-Parts/AARCO-INDIA.html

The other advantage is that these “contra-spinning”, H-Darrieus assemblies can be vertically-stacked in numbers, while hanging beneath the kite string pulley. The constant tug from the spring-loaded spool reel (minus its "catch" mechanism), is fastened below to the ground.
http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_200326536_200326536
This spool may be located about 100 feet away from where the trailer-mounted kite tether, hand-crank spool is located.
http://reelcraft.thomasnet.com/item/all-categories/heavy-duty-cord-reels-series-30000-/ca30106-cs?&plpver=10&origin=keyword&by=prod&filter=0

The multi-propeller system has props spread out on a relatively horizontal, spinning axle. So in that regard, it needs an elaborate “yawing” rudder fin to stay pointed into the right wind direction. The simpler, H-Darrieus assemblies will continue to spin, no matter what direction the wind is coming from.

I would also venture to say that, having vertical-spinning, carbon-fiber blades would be more benign to flying creatures. As these units get larger, the chaos vortex turbulences also have to be accounted for. There is already trouble with bats’ lungs exploding, from flying in the downwind vicinity of a wind farm.

Multiple spinning blades mean a smaller, more concentrated, trailing vortex street. http://en.wikipedia.org/wiki/Kármán_vortex_street

That means a smaller, more intense area of low pressure turbulence, is created. To maximize its efficiency and capture the “fresh wind”, these many spinning blades are tilted, upon its one long spinning axle. So, the area of downstream chaos vortex turbulence is magnified upon that one horizontal axis.
http://www.speakerfactory.net/Truss.jpg

Stacked H-Darrieus, contra-spinning units, would tend to spread its downstream chaos vortex turbulence along a vertical axis. This means less of a concentrated, low pressure zone in one area. This is better for the bats, and preventing the barotrauma from happening.

Is it really about making more wattage than the next guy’s design, or is it about efficiently utilizing the amount of decentralized power that is being created? That is, having highly-efficient appliances, which are used on a daily basis (i.e. refrigerator, lighting, computer, water pumps, electric vehicle). This upgrade to appliances that use micro-power, could offset a lower wattage output of this not-as-powerful, yet more benign, wind energy harvesting system.

~Darin