I need to know how to design the suitable Airfoil ??
My First plane I built was a failure, I tried to do everything to make it fly right, but I didn't get good results.... so I though it is something in the design, I'm right ?

Thanks for helping .

First question: Are you a beginner in RC planes, or just a "beginner in own designs" and already have experience in RC Planes.

If you are a real beginner, I would not recommend on trying to design/build and fly your RC Plane. It will take a lot of time to design & build it, and even more frustration trying to make it fly, or see it crash due to inexperience...
Instead, get a kit and learn from it...

Otherwise, try
http://www.rcfaq.com/INDEX.HTM

or search the scratch build forum on this site. For the design of your wing profile, use a program like Profili.
www.profili2.com

A must have if you're designing your own plane !

It is unlikely you will be able to design an all new plane right away. The best way to become a good designer is to copy and modify. Each plane will become more and more your own creation.

Tom

I agree with both of the above. And get Profili or a simular program. I am now using my own designed airfoil in some combat planes, and I used Profili to do it.

That said, why do you want to create your own airfoil? Programs like Profili come with piles of airfoil templates, and chances are you can find one that already does what you want.

I've also been designing and modifying others designs for a bit. Almost all the good designs have been based loosely on something else that came before it.

What are you trying to design, and when you say your first design didn't work, what exactly did it do? Though these kinds of things really aren't "beginner" questions, it's rare for someone to design their own trainer, and I would recommend against it.

The reason I have to build my own plane, is that the nearest RC shop is at least 1000 miles away from me , I live in the middle east , and I don't know if it would be possible to receive Kits throuh the net.

I travel to Erope from time to time , and once I saw a modeler ..... so I really liked modeling, and I tryed flying a plane a little, So I bought a RC transmitter , receiver, servos ......... etc.

I built my 1st plane, it was a normal one , wing span about 180 cm with a 2.5 ccm engine ( some people told me that it is an acrobat, but I said whatever ).

So now, I'm trying to make some other stuffs, like combats , acrobat ...... , but I just don't know which airfoil is suitable, which is for combat or for acrobat or for ... else, which one is faster or slower .... etc.

Are their some instructions or tips I can find somewhere about that ??

Greetings and welcome to RC Universe.

There is more than enough information here at this site in different forums. See the Scratch building forum. Certainly not a beginner situation however. Many other forums have information on the latest designs from the Combat to the 3D/IMAC/Pattern and Racing. Many links to sites and additional information.

You will have enough to do learning to fly a "trainer" type plane let alone an "aerobat or combat" type. Start with the basics in both flying, designing and building.

EXCAP232

Thanks For The Help

If you can get Coroplast/coroflute/correx (corrugated plastic sign board) where you are from...check out the Simple Plastic Airplane Designs forum topic here at RCU.

Welcome aboard.

There are some people here who enjoy designing planes and others who don't want to design, build, or even know what makes a plane fly.

Designing planes and flying them are very different activities... they both give you some useful information to use for the other, but neither one can prepare you for the other, and they each make good hobbies. I thing it is great that you're going to try designing your own.

The basic sizes and proportions for most planes are reused with only small changes... they can be found at Howard Sullivan's R/C Fight Unlimited site. There you will find a lot of information on many topics of interest to R/C people. There are also plans available on the web. The best way to produce a good self-designed plane is to start with a plane that's proven to fly well and change it to look the way you want without changing airfoils, angles, and areas of its flying surfaces. A super source for plans is http://www.aerotech-rc.com/. Another big plan site is theAirplan Man site. MAny of these you'll need a CAD program to manipulate, but there are free viewers available on the web that should also allow you to print the plans (you may or may not be able to control the size of the printing.) A final source you'll like is the UIUC Airfoil Site... It's full of coordinaltes and graphics defining zillions of standard airfoils and a lot of non-standard ones... many many hundreds of them as well as free trial software downloads to examine, compare, design, and print airfoils.

On airfoils, when all is said and done most of todays models use the NACA 2412 or a near relative for "semi-symmetrical" foils and the Clark-Y or a near relative for "flat-bottomed" airfoils... and millions of dollars' worth of research has been devoted to finding better things to use, but after 80 years of trying, it hasn't really found much better so far. You or I may be able to better that record, but it is not likely.

Anyway, have fun, use the wisdom that others have imbedded in the many free plans you can download, ask questions and, again, have fun.