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Ring wing

Matej

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I always thought that the ring-wing concept was tested only at RC sized-down models until I found this:

Borovaya UMMB from Belarus (picture from Airliners.net)
 

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Jemiba

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Maybe it's a bit subtle, but wasn't the Bell X-22 in fact a ring wing,
even a canard ring wing ? ;)

And, if this is too misleading, the SNECMA 450 Coléoptère certainly
was. There are few ideas in aviation too weird, to be tested at least
twice, I think !
 

Matej

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Well, X-22A was a ducted fan aircraft and the rear thing was certainly the wing, only interrupted by ducted fan.

But you are right with Coléoptére, I totaly forgot that it was also ring wing concept. In my first post I had in mind aircrafts that have it mounted horizontally, not verticaly like C450, Convair Model 49, Hanneton, Scarabée or Bruche designs. Something like this:
 

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Archibald

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Aparently the coleoptere wing concept come from a German scientist named Von Zborowski. There's some pages dedicated to the Coleoptere in "les avions de combat francais" by Jean Cuny... maybe some details about the wingh and Zborowski (not easy to write) I have to check...
 

Jemiba

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There was another frenchman (Zborowski became french citizen, AFAIK), who
designed ring wings : I. Labat with his "Aeroblics", which he credited with
exceptional short field performance.
(from Luftfahrttechnik 7/58)
 

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Andreas Parsch

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Archibald said:
Aparently the coleoptere wing concept come from a German scientist named Von Zborowski. There's some pages dedicated to the Coleoptere in "les avions de combat francais" by Jean Cuny... maybe some details about the wingh and Zborowski (not easy to write) I have to check...
There is a section (about 10 pages long) about Zborowski's designs, including the Coléoptère, in the "Flying Saucer" book which I described in the "New books" thread.
 

hesham

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My dears,

there is a drawing for Lockheed to SSBJ concept has
a ring wing.
 

ChuckAnderson

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ChuckAnderson said:
Hi Everyone!

Could this early aircraft from France also be classed as a ring wing?


Chuck
Hi!

You'll have to enlarge this a bit on your view!
Sorry!!


Chuck
 

Jemiba

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It's quite clearly a ring wing, I think !
Here's one more Aeroblic, this time a planned
demonstrator, the layout is more easily recognisable
here .
 

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Archibald

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In the may 2009 edition of Le Fana de l'aviation there's a bunch of annular wing concepts. Zborowski was a prolific designer.
 

RanulfC

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Ring Wings, also known as "Annular Wings" seem to have a long, if checkered history:

http://www.flightglobal.com/pdfarchive/view/1955/1955%20-%200863.html

http://www.flightglobal.com/pdfarchive/view/1957/1957%20-%200786.html

http://www.ufologie.net/aircraft/coleoptere.htm

Additional planned designs for Aircraft from BTZ:
http://www.aiaa.org/tc/vstol/unbuilt/btz/index.html

Build your own!
http://jetex.org/models/plans/plans-misc/article-plan-coccinellida-am-5611.html

Documents:
http://www.dtic.mil/cgi-bin/GetTRDoc?AD=AD297809&Location=U2&doc=GetTRDoc.pdf

http://www.dtic.mil/cgi-bin/GetTRDoc?Location=U2&doc=GetTRDoc.pdf&AD=AD0452725

Randy
 

mz

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There have been ultralight versions. One with the front of the ring wing high and the aft low, has flown in 1997:

http://www.ultralightflyer.com/orbit_air_ultralight/index.html
http://www.ultralightnews.com/airventure99/orbitair.htm

Keywords: Orbitair, David Myers, Oshkosh 1988, Patented 1990, Flown 1997.
 

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Jemiba

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Looks like a mixture of ring wing, box wing and disc wing.
Honestly, I still can see no benefit in the ring wing, apart for
an application as in some Coléoptère designs, where the wing
doubled as ram jet. For a tail sitter, ok, it gives a robust structure,
but where are real aerodynamic benefits for, say, a ring wing airliner ?
 

riggerrob

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The primary goal of ring wings is eliminating wing tip vortexes by eliminating wing tips.
 

Zootycoon

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Ah no, they can’t do that. The tip vortex is created where the high pressure on the lower surface can flow towards the lower pressure on the upper surface. That’s still going to occur on a ring wing at the LH & RH extent of span.
 
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