Home Your notes are welcome: Editor@UpperWindpower.com Most recent edit: Wednesday April 09, 2014
Archive of old forum called Gyrokites
filed Oct 27, 1977
by Anthony F. Bilardi, Richard E. Merwin
Discuss at: kitepatents/conversations/messages/468
|M33: Tethered autogyro US 5996934 A by Ellis G. Murph. Filed: Nov. 24, 1997.|
http://www.blueskylark.org/kites/chupp/ Chupp rotor
US2181477 Filed: Aug. 1, 1936
US1838327 Filed: Dec 11, 1929 by Arthur E Miller. Gyroscopic
Comment: Part of the flight operations is in full powered mode. But in forward motion, the wing blades may be disengaged from the power unit and let to autogyrate whence some powered gyrokiting occurs, albeit with a stiffened tether. The powered may be brought back to the otherwise auto-gyrating blades when needed and the kiting would cease then. ~ JoeF
M29: Hybrid: powered gyrokite with stiffened tether
Juan de la Cierva, of Madrid Spain
My interpretation: When the anchor is propelled horizontally pulling the unpowered autorotating wings we net a powered gyrokite, here with a stiffened kite tether. Studying powered autogyro systems is at once a study of kiting where the anchor of the kite system is moving, not really unlike the running girl holding a string that drags a wing of her kite system. ~ JoeF
M28: Aerovehicle system including plurality of autogyro
Gyrokites are with a powered aircraft anchor. The gyrokites may have one rotating hub of blades or more than one hub of blades. Cargo means are arranged to be lifted by the action of the autorotation of the wings of the gyrokite. ~JoeF
|M27: See "Non-Patent Citations" in link of M26.|
M26: Cited by and Refs: Aerovehicle system including plurality
of autogyro assemblies
US 8540183 B2 At the page, click on the "Patent Citations"
for over 80 patents cited..
M25: RE: Steven J. Elder US20110186687 Filed: Jan 29, 2010
M24: Using link of M26, study the patents "Cited by the examiner: "
|M23: Steven J. Elder Unmanned gyrokite as Self-powered airborne platform for electronics systems|
M22: Helicopters are not
gyrokites; however, ...Gyrokites have an opportunity to learn
some things from helicopter world, even though helicopters are not
Mulling over the whole of helicopter arts, sciences, patents, papers, lessons, safety, etc. will provide items for advancing gyrokiting.
Tease start: BELL HELICOPTER TEXTRON INC. Patent applications
M21: Captive helicopter-kite means
[[not really helicopter, but gyrokite]] by Arthur M. Young
|M20: Honda Motor Company : Tractive Flying Device JP2008087498 (A)|
M19: RE: Toy-scale gyrokite commercial products. Still photos
of a toy gyrokite in flight are invited.
M18: RE: Kattas US 5381988
Kattas recites "unpowered, tethered model gyroplane" for his kite system.
A stark AWES example:
http://www.skywindpower.com/ww/Aust-test.htm for two rotors; when
kited as gyrokite, some of the autorotation is mined to make electricity
aloft that is sent to a ground load by conducting wires. The same team
has been exploring four rotors and special arrangements.
Bryan Williams Roberts is studied in part through his patents on rotorcraft, mostly that are aiming for gyrokiting for electricity generation; his rotorcraft are hybrids that helicopter for some part of flight operations and then gyrokite unpowered for generation phases of the flight or for gliding in special circumstances.
A distinction note: An autorotating blade set on a kite's wing may be arranged for generation of electricity only and not be involved in the lift system of the kite-system's wing during unpowered kiting; such is exampled by the non-gyrokite of Makani and Joby who use rotors for powered helicoptering and generation, but not for kiting lifting and thus in the main are not gyrokites in the global-system sense. Just having a spinner on a larger wing where the spinner is for decoration or HAWT into apparent wind is not gyrokiting, but important in its own rights. Kattas and Roberts are dealing with gyrokites; Makani and Joby are dealing with non-gyrokites but in such lifting rotors to act as HAWT for generation.
So, careful study of Kattas would be needed to see what novelty he brings forward, as considerable gyrokite matter precedes his patent. He did not invent basic gyrokite. So, what novelty claims in Kattas will hold? Open for discussion.
M17: Kite. 1891. Thomas Ansboro and John Liddle.
1891: Filed: Jun 6, 1891 US464412
Thomas Ansboro of Glasgow, Scotland
Thomas Ansboro assigned half of the patent to John Liddle of same living address.
This topic thread invites a special study of the 1891 patent.
It seems strongly apparent that Ansboro saw his claims as "improving" the world of revolving kites; if so, just how much was already going on with revolving kites before or contemporary with him? I seek earlier kited windmills, rotor kites, gyrokites.
Fig. 2 is a side view of only the "lath" or "strip" that is used to hold the bridle or "belly-band" and the pivoting tube of the rotor assembly and the connection for the kite's tail. The lath or strip could be a stick of wood, but could be other materials.
On Fig. 4 drawing, the art misses labeling and showing one of the B' holes that is used to set one corner of one of the three sails.
In first view and reading, I missed that he was actually covering most of the large area with a kite covering, saving three special space for a second method of covering. So, he seems to have about 100% solidity of cover, but with three spaces of drooping sail with air outlet.
"I then cover tightly the two sections of the kite,
saving every alternate triangular-shaped space D,
with some close light material, such as cloth, silk, or
paper, and the alternate triangular-shaped spaces
I cover with similar material; but in this latter case
it is not drawn tight, but allowed to drop between
the openng of the cords, so as to form a sort of
semi-conical pocket D', as shown in Figs. 3 and 4. "
The aerodynamics of this kite are on the borderline of "gyrokite" because only a small portion of the kite's lift arrives from the semi-conical sails that funnel air to cause rotation; the rotation direction set up ends up having the base of the triangle sails be the air-release, not crosswinging leading edges. Most of the lift comes from the main covering that turns, but is not providing lift from crosswinding. Revolving occurs, but the kite seems still to be an extremely poor, if at all, gyrokite.
Notice that for achieving collapsible kite, he carries lath A and A' which are overlapped or married by tip clips M M; such fixes the two major halves of the wing for flight in "expanded" arrangement. A non-collapsible version of the kite would not need two laths overlapping.
The stresses on the pivoting spindle that tie the revolving wing to the bridling lath F will be considerable; bending forces will occur upon gusts, as F will be set by tether and bridle lines while the revolving wing incline gets pushed by a gust to a new position in space.
There could be fun in mods to the kite. Consider not globally covering the frame-work while keeping just the three semi-conical sails, perhaps enlarging the sail area of the three loose sails. Consider shaping the laths to airfoil shapes to have the laths become effective long wings themselves.
Another mod idea: Consider forgetting the global sail and the loose three sails. Just widen the laths and shape them as airfoils with advanced pitching to get a more advanced gyrokite.
My conclusion is that the Ansboro revolving kite gets almost no lift from revolving, but almost all its lift from the tight global covering. I almost do not want to include the kite in "gyrokite" category.
What say you?
|M16: We are glad to see a dedicated web site: http://GyroKites.com|
|M15: Kite by De Courcy and Schwarz. US2074327|
Tethered model gyroglider
Filed: Dec. 3, 1993.
Alex P. Kattas instructs gyrokite that when not kiting may glide as
gyroglider. while tethered and kiting, then it is a gyrokite, not
then a glider)
Complexes including trains may be achieved:
RE: SkyMill Energy, Inc.
From one of their patents we have a sketch of a kite train that is a gyrokite train
M12: SkyWind Power (SWP)
The team SkyWind Power aims to helicopter up and then gyrokite for generation, and so we dedicate a topic thread to study and discuss the company and its technology.
Associate and inventor paper:
Company home page
Study and discussion is open for this company that uses gyrokites for AWES. "Higher Airborne Wind Energy"
Their executive 2013 summary: PDF format:
SkyMill Energy, Inc.
Grant Calverley, president
This team seems to have a focus on gyrokiting in their AWES. The team is generally in business stealth mode. David Lang has high expertise in tether simulation. A hardware showing occurred in 2009 Chico, CA, High Altitude Wind Power Conference.
M10: RE: Igor Bensen gyrokites
seems like it will point to some facts on Bensen gyrokites.
M9: Safety for inhabited gyrokites
All are invited to post on the safety of inhabited gyrokites.
A live human or more are kited into the air; such is serious matter!
Learn from the incidents of others. So, what are the incidents? What lessons may be derived from the incidents. Rules, regulations, guides, checklists, tips, ... ?
|M8: Safety with uninhabited gyrokites. All are invited to post on safety matters regarding uninhabited gyrokites.|
|M7 Igor Bensen gyrokites. All are invited to help make robust the history of Igor Bensen's gyrokites.|
M6: Toy-scale gyrokite commercial products
This topic invite All to post items that deal with commercial toy-scale gyrokites. Spamming advertising is beyond the purpose of this forum; however concise presentation of facts once on a product is encouraged; then discussion on each product (again without spamming) could be important matter for the development of gyrokites.
Finding the first commercialized toy-scale gyrokite would be interesting. Historical products: yes. Contemporary toy-scale gyrokites?
Gyro Hang Glider Tow [<<=Click for
This topic thread is dedicated to the inhabited gyrokite
Focke-Achgelis Fa 330
a simple, single-seater, autogyro kite with a three-bladed rotor.
And a general link that will reach many sites for research on the Fa 330
|M3: This link should reach the posts in RWF that has the term "gyrokite" in it:|
|M2: The Rotary Wing Forum has some gyrokite discussions that inform gyrokites; yet that forum enters realms of helicopter and gyrocopter that are beyond our hereon Gyrokites forum. Especially we invite any safety matter to be rehearsed that is found in the RWF. http://www.rotaryforum.com/forum/index.php|
M1: All, Welcome to Gyrokites. Best of winds,
lift, and energy conversion to you and yours,