Hola, soy nuevo en este foro.
A quienes no entiendan español les pido disculpas.
Estoy empezando a diseñar un modelo canard, por lo que solicito links a webs que contengan información sobre el tema.
Desde ya gracias.

sorry but my spanish it bad have not used it for 30 years.from what i gather you are looking for links to canard models or design imformation.

Hello scalebldr.
It's correct, I'm seeking links that have information related to the canards. My English written is bad, but I understand it correctly.
Greetings, Angueto

Canards "depart" when pulling g.
This one did two of these.

Thanks Tall Paul, but I´m interesting in "pure" canards whit only two planes (main wing and fore plane).
Greetings, Angueto.

Angueto, at the SAE Aero Design West 2003 this weekend in California, this one from the Universidad De Las Americas would have earned the "Best Try Award" had we had one.
The guys spent 5 days working out the problems beginning with the lack of directional stability.. first attempts were without the vertical fins added to the wing.. Then the aft wing lifting first and forcing the nose into the ground on takeoff attempts.
Sunday it made a good take off and got quite high, but I think something in the control system failed, and it pitched down into the runway.
A very good effort regardless!

Thanks by the photo.
Really I am seeking links with "free" aerodynamic information related to the canards to finalize my own design.
Do you know one?
Angueto.

You might search for "canard" and "Rutan" on the net.
I recall a site (but don't have the URL) that does go into the aerodynamics of a canard..

Hello, again.
The web site of Rutan is www.scaled.com , but there not find the information that I´am seeking.
Angueto.

One good source is the information in Andy Lennon's book, "The Basics of RC Model Aircraft Design". (ISBN: 0-911295-40-2) It's also available through Air Age Publishing (Model Airplane News) at http://www.rcstore.com/rs/general/li...t=10&catego=BO ... You can always trust Andy's math.

Also, beware of small canards, especially if you intend to use scale airfoils. A recent design project, a 1/3rd scale Berkut-Long EZ ( http://www.fuscoaircraft.com ) proved this to me. We originally planned to use all scale airfoils, but found that the scale canard (which functions like a slotted flap on that aircraft) was totally ineffective at 1/3rd scale. The plane would not rotate.

I then tried a Clark Y airfoil, with a standard aileron-type hinge, which was at least flyable enough to do some flight testing. The final "That's it!" solution came when we increased the span and chord just slightly, and switched to an Eppler 197 airfoil. The plane now handles like any other plane, in terms of authority and agility, with no bad habits.

Canard aircraft are interesting, and can be made to work, but plan on a little experimenting to get it really right.

Thanks by your contribute Mike.
Really through the years I have designed and fly successfully all kinds of models, of high wing, low wing, acrobatics, biplanes and twins.
Now I am with the canard. Already I have the book of Andy.
I only want to learn something more, and also to test different profiles for the canard (even one totally flat)
What that you think of this last? I have seen plans with the canard flat. Functions?
Your 1/3 giant Berkut seems up really good.
Greetings, Angueto.
www.hobby-club.com.ar

Through the years, I've found that the general rule mentioned in Andy Lennon's material is correct... That is, once the chord of an airfoil drops below 5 or 6 inches, you may as well have a flat plate, due to Reynolds numbers effects. (The exception might be highly cambered airfoils, and I have almost no experience with those, so far.)

The canard on the 1/5th scale Long EZ is simply a sheet of balsa... Airfoils made no difference in testing.

Good luck with your design project.

Thanks Mike.
Always is good to count on the opinion and experience of other colleagues.
As my prototype has a canard of only 6 inches of chord I will begin using a totally flat profile for testing it, with at least +3º or + 4º of incidence.
Greetings and thanks again.
Angueto