what airfoil for a 1/4 scale citabria?? - RCCanada - Canada Radio Controlled Hobby Forum
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Old 02-03-2007, 01:50 PM   #1
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what airfoil for a 1/4 scale citabria??

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hello all.. asking this question again, as the last time i asked it, there was no response.

I have an old nosen citabria kit, but the original was a 3 channel with no ailerons, and a flat bottom, clark Y airfoil. I want to change the airfoil on the wings and wondering what kinda airfoil to use. A semi symetrical or a fully semetrical.

I am looking for some ideas or an actual airfoil to use on this plane. I would like it to be able to perform some scale maneauvers, and fly decently.And have ailerons.

Has anybody done this, or built a larger sized citabria/ decatolon, and can tell me what airfoil was used or better yet, give me a copy of the airfoil.
happy flying
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Old 02-03-2007, 02:36 PM   #2
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The real Citabria used a NACA 4412 and the real Decathlon used a NACA 1412. Those are the same thickness forms, but the 4412 has 4% camber, and the 1412 has 1%, so it is far more symmetrical.

A pretty good list of airfoils of real airplanes:


GIFs and coordinates for these and most other airfoils can be found here:


Both these airfoils work quite well at lower Reynolds numbers, and with a 1/4 scale model would give pretty good scale like performance.

Of course, more modern model airfiols could perform better. I could dig out my Selig/Donovan data to pick one for you if you are interested in the ultimate aerobatic performance. The real airfoils would likely be great on a 1/4 scale, and scale too!

Kevin Caldwell

PS: here is good description of both aircraft in detail:

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Old 02-03-2007, 04:08 PM   #3
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Re: Airfoils

Originally Posted by kcaldwel
The real Citabria used a NACA 4412 and the real Decathlon used a NACA 1412. Those are the same thickness forms, but the 4412 has 4% camber, and the 1412 has 1%, so it is far more symmetrical.
Split the difference and go with a NACA 2412. I used one on a foamy Agwagon and I was quite happy with it

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Old 02-04-2007, 09:02 AM   #4
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