Home Your notes are welcome: Editor@UpperWindpower.com Most recent edit: Saturday March 22, 2014
FlipWings, flip wings, flipwings
Flip wing, flipwing, FW
axis of rotation
Flip wings rotate about an axis traverse to the ambient wind. We distinguish flip wings from Darrieus arrangements and the canoical Savonius two-part arrangement. Flip wings (FWs) alternate leading edge with trailing edge about an axis that is generally within the airfoil. Flip wings generally easily autorotate, though a stable stall may occur in some versions where rotation stops. Flip wings have many potential uses and may occur in trillions and more of shapes, sizes, colors. Flip wings may be powered by wind, gravity, or artificial power sources. Rotation may be braked or encouraged in various ways. Stability and control of particular arrangements for various purposes ever challenges. Some general uses of flip wings include but are not limited to: kite systems, kite-energy systems, gliders, paragliders (gliding kite system), parachutes (kite systems with focus on retarding fall when exiting some other object like airplanes, bridges, buildings, etc.), attractive ornaments, advertising machines, toys, etc.
Notice that an arrangement may have multiple FWs in various strings or arrays or matrices or nets. And notice that the ribbon flip wing (RFW) is included as a very extreme aspect-ratio wing. Notice that FWs may be hard-coupled with earth or structure or may be tethered and flying/gliding/kiting. And materials used in FWs may run the full spectrum of matter. Enhancements in FW systems and devices are of interest (light, energy collection, communications, control, tasking, play, competition, games, commerce, etc.)
For the purposes of this group, a Savonius arrangement will be seen as a flip wing with a slat.
This room-forum is part of the AWES Museum.
purpose. Tell us. Show and tell. Dream. Collaborate. Develop. Show
history. Let us know about your idea or finding or link. Have it all
be about flip wings.
Flip wings rotate about an axis traverse to the ambient wind. We
distinguish flip wings from Darrieus arrangements. Flip wings (FWs)
alternate leading edge with trailing edge about an axis that is generally
within the airfoil. Flip wings generally easily autorotate, though a
stable stall may occur in some versions where rotation stops. Flip wings
have many potential uses and may occur in trillions and more of shapes,
sizes, colors. Flip wings may be powered by wind, gravity, or artificial
power sources. Rotation may be braked or encouraged in various ways.
Stability and control of particular arrangements for various purposes ever
challenges. Some general uses of flip wings include but are not limited
to: kite systems, kite-energy systems, gliders, paragliders (gliding kite
system), parachutes (kite systems with focus on retarding fall when
exiting some other object like airplanes, briges, buildings, etc.),
attractive ornaments, advertising machine, toys, etc.
Notice that an arrangement may have multiple FWs in various strings or arrays or matrices or nets. And notice that the ribbon flip wing (RFW) is included as a very extreme aspect-ratio wing. Notice that FWs may be hard-coupled with earth or structure or may be tethered and flying/gliding/kiting. And materials uses in FWs may run the full spectrum of matter. Enhancements in FW systems and devices are of interest (light, energy collection, communications, control, tasking, play, competition, games, commerce, etc.)
M3: All members are invited to post links and photos and files in the
special folders of this group.
One set of folders invite posting of links related to categorized FW products.
See the menu on the left of your screen. Sign in to the online group and post items in those folders.
I may host some images for some members. Images may be shown in messages, but not video.
For video, host in a free online video service and post the URL for the video.
M4: Both on and off branches, leaves seem to enter flip winging .
Noticing some special aspects of leaf-flip winging:
1. Rebound flip winging on parent plant: The leaf as wing is pressed by wind to rotate, but the tether of the leaf allows only some kiting before the torque of the tether stem halts the flipping and drives a rebound untwist. So, in this instance one finds some leavess rotating one way and then rebounding with a rotation the other way. The lift occurring in each sector of these two actions causes a bouncing action.
2. A fall leaf is in free flight and often begins a rotation about a central axis. Even when the leaf reaches the ground, if the ground is free from snags, one may observe some leaves "rolling along" which often is a result of flip winging where one edge of the leaf lifts aerodynamically and flip while then leaving the other edge of the leaf to be the airfoil leading edge. Flip, flip, flip .... rolling right along the ground. Flip winging along the ground may wear down the leaf to higher aspect ratio wing form and eventually just the central sturdy part of some leaves will end the course of flipping. Not all leaves go through such FW process, but many do every day someplace on earth. The flipping leaves crash and crunch. Such FWs eventually decay (become food for living creatures) and become soil (that allows further plants and animals to live later).
3. A fall leaf sometimes gets caught by spider webs; and some of these catches allow various types of rotations. Some are so caught that a rebound torque occurs and a set of rotations happens in one direction and then a reversing occurs for the other direction. Other arrangements allow a two-end catch flipping and lifting where a falling and re-lifting is an observed occurrence. Some catches allow a non-FW rotation where the HAWT occurs.
So, some leaves at times are non-FW kites, FW kites, free-flight gliders, free-flight FW gliders, reversing-direction FWs, single-line HAWT, non-rotating parachutes, ...
Descriptions and illustrations and videos are invited by all to open up the leaf world mostly relative to the FW instances.
How does Nature use FW in leaves? Distance traveled? Pumping fluids? Adding visual dynamic delights to the world and to appreciating humans? Spread of future nutrients (rather than just vertical drop)? Other. Scientific papers on the FW aspects of leaves are invited. Experiments? Measures?
Wafting and buffeting of leaves seem to be short spurts of flip-winging.
Also, consider making artificial constructs that end up being FWs where leaves provide the primary or dominate building material.
M5: Patent number: US 2501442
Filing date: Apr 6, 1948
Issue date: Mar 21, 1950
Jesse C. Donaldson
Click above image for full patent.
Discuss comprehensively as your fun and interest takes you.
M6: Rotary kite
This is a flip wing with the kite focus:
Joseph E. Smith
Patent number: US 2768803
Filing date: Apr 28, 1953
Issue date: Oct 1956
|M7: Wolford with appearance patent USD160910|
M8: Santos AWES Flip-Wings Discuss the flip-wing AWES
offers of Dave Santos.
Here is a video of a recent March COTS AWES flip-wing joined with line-held active oscillating wing.
M9: Is the Savonius wind turbine a FW ? Discuss.
What about the gap?
When does a gap begin to determine a Darrieus?
M10: Hultgren and Bolkcom and their Rotating Kite
Ornamental specific appearance design patent: USD315750
M11: Willem H. A. G. van Ittersum, Netherlands
Patent number: US 2107808
Filing date: Jan 22, 1937
Issue date: Feb 8, 1938
M12: Thomas J. Bukur and his Rotary Flyer
Issue date: Feb 4, 1997
Patent number: 5598988
Filing date: Apr 13, 1995
Issue date: Feb 4, 1997
|M13: Ames and his Apparatus in 1908|
M14: Three team on Rotatable Kites in 1961
Joe E. Edwards, Jr.
M15: Lyle and Richard team on Rotary Kite in 1976
Lyle William Springston
Richard Lyle Springston
Patent number: 4012017
Filing date: Jun 8, 1976
Issue date: Mar 15, 1977
M16: Lemelson in 1977 with Flying Toy
Jerome H. Lemelson
Patent number: 4121794
Filing date: Jun 24, 1977
Issue date: Oct 24, 1978
Click image for full patent; discuss claims.
M17: Daniel Jeffrey in 1985 instructs Space Spinner
Patent number: 4606518
Filing date: Feb 25, 1985
Issue date: Aug 19, 1986
Click image for full patent; discuss claims:
M18: Sams and his aerodynamic devices in 1987
Patent number: 4779825
Filing date: Mar 3, 1987
Issue date: Oct 25, 1988
Click image for full patent; discuss claims.
M19: Mullinix in 1962 puts focus on bridle construction
Charles D. Mullinix US3108770 Bridle construction for rotatable kite
M20: Bukur continued his flip wing interests
At message #12, see an earlier patent on flip wing kite by Bukur.
Also in other group: http://groups.yahoo.com/group/kitepatents/message/519
Thomas J. Bukur
Patent number: 5954297
Filing date: Feb 3, 1997
Issue date: Sep 21, 1999
Click image for full patent. Discuss claims and differences from his earlier patent.
M21: Alfred C. Finn on Toy-kite Airplane
This concerns a flip-wing kite.
Patent number: 3997136
Filing date: Jan 2, 1975
Terms: rotatable wings,
M22: Kite or similar article by Waclaw Deptula
Design appearance patent:
Kite or similar article
Patent number: D255469
Filing date: Apr 28, 1978
Issue date: Jun 17, 1980
Click through image for more drawings. Discuss any related product history, performance, video, etc. DIY examples?
M23: Toy Aircraft by Lorist
[Design appearance patent.]
Hendrick J. G. Lorist
Patent number: D280113
Filing date: Dec 12, 1983
Issue date: Aug 13, 1985
Click image for full patent. Discuss.
M24: Manned Flip-Wing flying machines
Flip-wing flying machines (kites, parakites, powered fan-wing, etc) having humans aboard may be rare.
Having a flip-wing as a parachute device would have the hazard of the rotating wing coming down on top of the pilot.
We seek instances of flip-wing flying machines with humans aboard. There may have been some obscure experiments that will be reported.
In 2012 there is a news article"
First manned flight of FanWing aircraft planned for next year
Reports on efforts in that arena are invited.
Patrick Peebles http://www.fanwing.com/fanwingltd.htm
Reports from other types are invited also.
M25: Frederick D. Ferguson; Magenn
Frederick D. Ferguson
Mostly flip-wing, little Magnus effect
His earlier item of Magnus effect:
|M26: Acrobatic rotary flyer by Harris in 1977|
|M27: Mullinix on bridle for rotary kite|
M28: Butz instruct Waterfowl Decoy Kite, a flip-wing kite
Modes of flipwinging
During a flip (whether the flip is partial small, partial large, or full)
... we get a variety of modes or actions occurring:
M30: Calhoun instructs Tethered Toy Airplane
Tethered Toy Airplane
Jack A. Calhoun
Patent number: 2593979
Filing date: Jan 11, 1952
Issue date: Apr 22, 1952
Click image for full patent document. Discuss claims, etc.
M31: Aerodynamic Devices. Kenneth Sams. 1987. US 4848704
|M32: Albertson in 1959 instructs Rotary Winged Kite|
your links and notes about tumblewings which are flipwings:
M34: Someone exploring ...
M35: Rotating ribbon flip-wing kites (RWK)
Welcome to this thread are notes, examples, discussions, plans, etc. on rotating-ribbon flip-wing kites of two spread anchors.
At the base of the long flip-wing of the ribbon sort are swivels or slip rings; design of these are invited. What is the "life" in operating hours of this or that swivel?
Intermediate swivels that live between wing segments? Specifications for the ribbon wing? Advanced ribbons? Small chords. Large chords. Mining energy from the operated kite? Sound measures? Uses of the RWK used singly or in clusters or farms?
Rod Read has some notes.
We give some beginning links:
M36: New, simpler, easier way to grow an AWE service
New, simpler way: http://www.energykitesystems.net/donate.html
M37: Re: Rotating ribbon flip-wing kites (RWK)
M38: AWE Encampment flip wing exploration
also being discussed at group AirborneWindEnergy: airbornewindenergy/conversations/messages/10764
kPower demonstrates the power of a 3 meter wingspan FlipWing at the Texas AWE Encampment. Wind speed was approximately 18mph. The metal spring scale was hard to hold in my bare hand (with the camera in the other hand) and therefore much power was lost through my body. Stop motion on the camera revealed spikes up to 25 lbs. More accurate testing to follow.
Crude Video: http://youtu.be/edB6uWXV8Qs
Scale demonstration anticipates giant wings flying high above the Earth. Ground based single stroke kite engines will harvest the power.
kPower CC by 3.0
M39: William Dean Hay, filed 28April1995
William Dean Hay
Filed: April 28, 1995
Flying toy: kite CA 2148157 A1
Hay takes effort to mention Lemelson's patent which we discuss in
But Hay has 7 claims we are up for study and discussion.
M40: Thomas J. Bukur in 1999
Filed Sep 20, 1999
We have note other of his flip-wing patents, but just now list this patent that had been overlooked until now. Here he instructs on many matters of interest.
The examiner cited some patents. It may be interesting to discover just why the examiner cited each patent that was cited. E.g., why cite the Rogallo patent US 3296617 Target Kite ?
Also, the examiner cited a US 5598988 with a name spelling that needs to be verified. Answer: On the present patent for this reference, there was a typo error of spelling. What was printed "Burkur" should have been "Bukur" for the same inventor of the present topic.
|M41: Notice by Yahoo of closure of the group name.|
|Group deleted. Stree of threat of deletion is too much cost to moderator, so we will develop the messages in this folder at EnergyKiteSystems.net|
Webmaster work yet:
Redirect to this folder where the FlipWings folder was mentioned: AWESMuseum, Glossary, else?
|O'gorman William Francis Filed: Mar 10, 1955 Airplane-kite US2801063 The wings are flip-wings rotating in one direction.|
|Flying the SkyBow under a Lifter Kite CoopIP, by kPower; March 2014. AirborneWindEnergy/conversations/messages/12063|