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Albatros (Plan and Article) (hlsat)
Aerobatic, Pattern, Sport
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Euroclydon Tailless Wing
Euroclydon Tailless Wing

            

Euroclydon Tailless Wing
Description: 110" Wingspan.

This aircraft is a clearer representation of the Paoli French wing on which it is based. It was updated by myself, and built by myself successfully, with awesome results. The original Paoli was lacking in many areas, so I took it upon myself to "modify" the design. The original designer "flipped" the elevons from right to left for some unknown reason, resulting in an odd airfoil at the tips, which was unacceptable in my mental design book. It was also a "Two" piece wing joined at the root ribs complicating matters worse. It is now a viable aircraft. IMHO
Keywords: Paoli, Euroclydon, Flying wing, Tailless, Horten
Date: 08.30.2019 18:28
Hits: 769
Downloads: 406
Rating: 0.00 (0 Vote(s))
File size: 8.5 MB
Added by: Goloka

Comment:
Goloka
Member

Join Date: 05.31.2014
Comments: 11
Euroclydon links

Watch it fly, and get a description of it close up at these links.

Please disregard my ramblings of it having a "highly" modified airfoil. It is an Eppler 207.

This wings sweep is pretty shallow. In the flight video, you will see it pitch up here and there when it hits a headwind gust. It was a very windy day on the south slope. This pitching is normal.

I almost lost it to a midair in this vid.
One of the first times I flew it, two of my buddies had a couple of Pike Perfect all glass ships in the air, and I proceeded to climb right through them, and seriously topped over them.

As a hang glider pilot of 25 years I have always been fascinated by a "finless" Hortenesc wings, as it is the most efficient of aircraft design.
Enjoy!
https://vimeo.com/manage/5546612/general

https://vimeo.com/manage/5922271/general

https://vimeo.com/manage/5923710/general

https://vimeo.com/manage/5967638/general

https://vimeo.com/manage/5968237/general

https://vimeo.com/manage/5969020/general

https://vimeo.com/manage/5969470/general
08.30.2019 21:26 Offline Goloka
Goloka
Member

Join Date: 05.31.2014
Comments: 11
Construction Pics

I have maybe 100 pictures of its construction. If you are serious about building this thing drop me a line here, and I will get the pics to you via a file share.
08.30.2019 21:48 Offline Goloka
mmorao
Member

Join Date: 08.16.2011
Comments: 66
If I'm not mistaken...

... this is then a rework of the Paoli design which I remember seeing twenty or thirty years ago in DXF format. At the time there were no large format scanners nor were they dreamed of so what everyone did was draft or convert everything to this or that CAD package and publish in DXF. I was then puzzled by the elevon geometry, obviously you are happy with them, Goloka, could you please comment on those elevons?
08.31.2019 02:51 Offline mmorao
Goloka
Member

Join Date: 05.31.2014
Comments: 11
Elevons

mmorao, Hello,

Yes, you are exactly correct. From what I can gather, the reason that the original designer, or should I say, the young man who first put the original design concept on to paper, "flipped" the elevons, was for a practical construction purposes reason.

Quote from the original website:

"I must add that the "paoli solution" was displayed in the french magazine RCM, in an article written by B Rigoulot.
Indeed, Mr Paoli was a pilot during the WWII, and was concerned with pure flying wing. He comes to this wholy simple and efficient solution."

(The link is still good)

https://scherrer.pagesperso-orange.fr/matthieu/english/paolie.html

In my opinion, no ill intent, it was a serious design flaw. On a tailless aircraft the tips of the wings are the most important aspect of the aircraft for stability.

As I stated, I am a hang glider pilot of 25 years, with a pretty good sense of design/aerodynamics, and, I actually fly tailless aircraft for real.

Although there are no moving surfaces on a hang glider, and control is achieved by weight shift, the fact remains that if you have something funky going on at the tips, it is not going to fly right.

I have had friends who have not fastened battens at the tip of their hang gliders before running off a slope, AND 2000 ft mountains say,

"hey something just did not feel right when I flew"

They were lucky to be alive.

On a hang glider the washout is is incredibly important for all aspects of flight, along with the "anhedral" of the wing.

On this aircraft it is no different, just on a smaller scale. (no anhedral though)

The reason I actually built this plane was because that when I flew my Zagi's on slopes, I noticed that while in combat, when my fins were knocked off, I noticed that my Zagi kind of still flew.

I observed that the original Zagi had an elevon that was wider at the tip as opposed to the root, so I figured that when the deflection of the elevon was increased, washout increased, in effect adding stability to the turn, without tip stalling.

When I saw this aircraft on the original designers page, AND the shape of the elevons, I said to myself, "could it be" , so I set out to build it.
Then... I read his page, and said "what!" Uhh no on the flipped elevons, so I just built it differently.

When a search is done on this excellent website, you will notice another person did his own take on the original design also, and added a power pod, which looks awesome. He did not flip the elevons either. Paoli 3000

As I stated, if you wish to see how I did it, shoot me an email, and I will send the pics to you, or if I can figure out how to post them here, I will do so in a zip file.

Cheers
Ted
08.31.2019 09:03 Offline Goloka



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