Joined wing explorations and confirmations

Joined wing explorations and confirmations ...
flying, testing, building, dreaming, studying by Alex Morillo and others:

http://www.energykitesystems.net/Lift/2009/mar2009/index.html

http://www.instructables.com/id/Very-Simple-Kite/#step1 Joined-wing kite

Co-worker SpiralAirfoil Dan Parker gave lead link for Synergy Aircraft: http://www.kickstarter.com/projects/launchsynergy/synergy-aircraft-project and http://synergyaircraft.com/
[ ] Brian Porter ... all his wings
Alberto Santos-Dumont and his 14-Bis http://en.wikipedia.org/wiki/Santos-Dumont_14-bis
Explore the Hargrave box kite as a joined wing system

Harry, Consider- The modern airliner has a complex wing that opens into a true multi-wing for take-off and landing. The slats and multi flaps are clearly seen for the true wings they are when separated out in use. Therefore Boeing and Airbus ONLY make multi-wing aircraft, rather than "nobody makes them". Such multi-wings are an essential engineering feature, not a frill. The true wing count has actually increased over time.

Also, there are popular sport planes made today with multiwings in a traditional sense, especially for combined extra strength and snappy aerobatic performance. Some SSTs had fore wings. Airplane stabilizers should also count as true wings, if of a special function, and they often add lift, so almost every plane is multiwing in a strict fundamental sense. Large helicopters have high blade counts from necessity. One could go on with such examples.

Therefore, lets not be blindsided if higher wing counts somehow emerge in new wind turbines, especially in AWE, but keep an open mind, daveS Dave Santos, May 16. 2012

[] What is going on: ISAT REVCON "Joined-Wing Technology Evaluation" Systems Study"

http://handle.dtic.mil/100.2/ADA425641

Dr. Julian Wolkovitch was in early Low & Slow office with models and images. We talked at length. He thin lived in my home town of Culver City.   RIP.   He was a subscriber to Low & Slow.

Brian Porter    Folder of files are being made.   May 17, 2012.

John MacDonald       Folder of files are being made. May 18, 2012.

[[ [ ] Note added on May 13, 2012:   Consider claims by John MacDonald.    TonyP is researching. [ ] Platz sailwing very much cores on precedence on some of the works.   Independent split sailwing HG by Prentice is documented in LIFT, which see. Some email discussion is still ongoing on these matters. Related: Eric B. Hall, Julian Wolkovitch, Tony Prentice, John MacDonald, and some kite patents. TW hang glider

Text at group: "This is called faith in my design and construction! Designed built flown early 70s.

TW hang glider.jpg - 49.2 KB - Views: 167
Posted by: macboffin on May 13, 2011 12:41 PM " ]

Is this the compound wing aircraft patented by Eric B. Hall that was filed Oct. 2, 1979. It follows the lines of one of the several embodiments drawn in the patent; see below on this LIFT page.   Notice the cited 1916 filing of Emmons where Emmons had the strong triangle frame part as undercarriage (in 1908 in Breslau, the cable-stayed triangle control frame with pilot hung behind it may be part of the robust story Rupert A. Emmons clip of 1916 filing for his patent).

Recall that Julian Wolkovitch was in 1972 or 3 in the Self-Soar Assn. and Low & Slow office with info, etc.?

]]

]

Joined wing aircraft      G: "Wolkovitch wing"
US Pat. 3942747 - Filed Jun 24, 1974
9, [54] JOINED WING AIRCRAFT [76] Inventor: Julian Wolkovitch, 28603 Trailriders
Drive, Rancho Palos Verdes, Calif. 90274 [22] Filed: June 24, [21] Appl. No ...

Faust-Snout Joined-wing hang glider

Patent number: D292203
Filing date: Jul 16, 1985
Issue date: Oct 6, 1987

Eric B. Hall, US Pat. 4336913

Frank J. Bartolini

Patent number: 3995799
Filing date: May 23, 1975
Issue date: Dec 7, 1976

http://www.youtube.com/watch?v=NtMkbi_D2TU Diamond wing

[ ] Boxwing    search videos

[ ] http://www.modelflight.regheath.com/earlybirds/images/1909ChauviereNo2.jpg

[ ] See November 2010. e-mails with AM. See the art and follow his claims.

[ ] http://gardenofpraise.com/agbell4.htm

Rogallo concentrating on boosters but realizing much more.

(See e-mail of November 17, 2010) Note: This confirms that similar joined wings, with ¨wing - struts¨ are truly airworthy ...yeah ! AM. (winging structs)

[ ] http://energykitesystems.net/Lift/2010/AM/KrooToMorilloJOINEDWINGS.jpg
Bring in Tony Prentice 1975c Splitwing
See notes in: Brett Snellgrove (RIP) and Tony Prentice discuss matters in Homebuiltairplanes. Has some joined wing and ring wing commentary. Ligeti Stratos: World's first open source aircraft
See the joined wing item in 1909 Jane's All the Worlds Air-Ships.
http://t3.gstatic.com/images?q=tbn:qmxn42irdjjSHM:http://www.modelaircraft.org/plans/images/2007/1009.jpg Rhom-Bus
Bring in Mobius-like joining structure for fluid dynamic foils by Jerry E. Carlow

[ ] Yet to do: Reference for the morphology of joined wings

http://www.flightglobal.com/pdfarchive/view/1911/1911%20-%200221.html

http://www.flightglobal.com/pdfarchive/view/1911/1911%20-%200294.html

http://www.flightglobal.com/pdfarchive/view/1911/1911%20-%200280.html

More Splitwing hang glider photos to show from Tony Prentice. Note the TP photos Splitwing are yet to put full placed in a 20-photo file.
Two different splitwing patents.

[ ] http://img.auctiva.com/imgdata/0/5/7/1/8/3/webimg/412409982_o.jpg Explore "Diamonds"

http://upload.wikimedia.org/wikipedia/commons/thumb/0/02/C_R_Flugan.jpg/300px-C_R_Flugan.jpg

http://www.flightglobal.com/pdfarchive/view/1911/1911%20-%200212.html Incomplete join, but joining ...

http://www.flightglobal.com/pdfarchive/view/1910/1910%20-%200381.html?search=glider&tracked=1 ?canard in front of joined wing?

[] http://airforcemuseum.ca/en/aircraft/scale-replicas

http://www.gettyimages.com/detail/3287780/Hulton-Archive

http://farm5.static.flickr.com/4146/4832896713_7606556160_b.jpg TCF, ski, wheels, joined wings, biplane joined wing

[ ] http://books.google.com/books?id=OGUEAAAAMBAJ&lpg=PT46&dq=kites&pg=PT45#v=onepage&q=kites&f=false

Hang 3 pilot, Driver at Quest 04, 05, 06 Driver at Big Spring 07
Gypsy Project Designer
Driver - Guide in Ecuador
Street Luge nut , WW Fan
currently flying a Airwave K2
come FLY in CANOA !

New story:

E-mail message and images.
Make thumbnails. Make the files now.
Closed boxkite aircraft. Annular wings. http://uh.edu/engines/epi2518.htm
Patent number: 7644892 Blended winglet
Filing date: Jul 6, 2006
Issue date: Jan 12, 2010
Application number: 11/481,571
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Explore all related patents for the story:

30+posts in OZ Report

Preamble links:

Former LIFT notes

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OZ Report discussions:

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DIY J-5

Hey Amigos

Directional Stability without a Rudder(s) ? yes, I tried it and the gliders wooble around , the extra weight, drag, and assembly time is worth the effort, specially if I intend to fly at 100Kph !

Birds don't have rudders, yes that's true, but they have their built-in mechanisms to control their heading. I believe in biomimetics, but at high speed we want some vertical surface(s) to keep us on track. Some manta rays have a ¨rudder¨ ....must mean something !

Net dihedral effect on Joined Wings When banking (say left ) the lower front (left) wing is trying to go up to self-level, but the rear right upper wing is trying to pull UP , fighting the lift of the main wing, eventually the main wing (left side) wins and the glider self levels.
More Dihedral is better on JWs ...I have built a.6 deg , which is OK , 10 is better .
Another reason - the anhedral angle of the aft wings is important, it shouldn't be parallel with the main wing. I think you get the point, right ?

There is no better way to ¨see¨ all this flying dynamics, than to fly yourself, so, here are some ¨plans¨ if you wish to build a J-5 JW ; you are welcome to build a balsa HLG to test fly.

You can try any angle variation from the stock 140; they all fly. What I m trying to find is THE best configuration - geometry, perhaps you guys can help ! THANKS.

Ref ´ Aerodynamics of Joined Wing Configurations ¨ by LAURENT VIERIA de Mello
Cranfield University and ref 6 ( JW configuration drawing ) by Hashimoto

Fly gentlemen , Fly !
Alex

Brett to amorillo61, Tony, Joe
show details Jan 26, 2010

Some points to ponder.

Flying wings with around 20 degrees sweep have directional stability that derives from sweep alone and typically don't need additional vertical devices - see the Horten wings that flew well over 100 kph. If you used a Bell distribution you get additional stability from the tip washout - none of the Horten wings had directional stability issues and all had no verticals at all.

Some military aircraft that need high levels of sweep actually use anhedral to reduce the excessive directional stability that results from the sweep. Hang gliders need no verticals and actually use anhedral as well - not to reduce directional stability but to couple roll with adverse yaw that results from tight sails in high performance wings.

Tip rudders have been found to impart directional stability considerably better than central fins in flying wings - this works best if a degree of aerodynamic or geometric toe out is used. When the wing yaws one surface strikes the airflow at an increased AofA the other at less - the drag differential imparts yaw stability.

Birds do use an effective vertical surfaces: the tail can roll as well as deflect up and down.

Brett

See his further e-mail and image July 29 or July 30. Include it all.

Deal with split wing of Prentice

Deal with

Hang glider

Frank J. Bartolini

Patent number: 3995799
Filing date: May 23, 1975

study.

Study as a sub-topic of joined wings.