Re: Symmetrical wings

Thanks everyone!!

Your feedback really helped me!

I was a little lost but know I have some models that are exactly what I
was looking for.

Best Regards

João

Ed Cregger escreveu:
"Martin X. Moleski, SJ" <moleski@xxxxxxxxxxxx> wrote in message
news:3jm882h0cd249mtl7m9tskro4dfvd9tei2@xxxxxxxxxx
On 5 Jun 2006 05:19:08 -0700, "joaobettencourt"
<joao.paulo.bettencourt@xxxxxxxxx> wrote in
<1149509948.610366.56920@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>:

I'm doing a wind tunnel study of the performance of r/c model wings. To
continue my study, II need to find wings with symmetrical airfoils. I
tought that perhaps you could indicate me some models that use wings
with symmetrical airfoils.

Gack!

That's a hard question.

I'm not sure any of the models I can think of have pure symmetry.

And the database in my head is dated.

Ultra Sport?

Dazzler?

Doghouse Extreme?

Most of the 3-D stuff that's come out recently?

Lots of control-line precision aerobatic (stunt) planes. Try
the editor of Model Aviation.

Maybe try this guy:

http://www.airfieldmodels.com/information_source/math_and_science_of_model_aircraft/rc_aircraft_design/plotting_airfoils/about_airfoils.htm

Or get a copy of Model Airplane News or RC Report and leaf through
the ads.

See if you can find Andy Lennon's articles. He did a lot of weird things:

http://www.amazon.com/gp/product/0911295402/002-9905550-6420001?v=glance&n=283155

Hope this helps.

Marty


I agree with Marty's list.

A few that can be found on the internet are some of the old Bridi designs,
such as the Kaos, Trainer 60/40 and the Dirty Birdy.

Increasing and decreasing the radius of the leading edge will reveal some
interesting characteristics regarding the eagerness of the airfoil to break
into a stall at various AOA/velocity combinations.

Varying the thickness of the airfoils also reveals interesting
characteristics.

Additionally, moving the high point (thickest point) of the airfoil also
reveals interesting characteristics.

Good luck and much learning in your studies.

Ed Cregger

.

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