Symmetrical Section for stabs?

[MtnGoat]

Anybody have any opinion on what symmetrical section to use for a full flying stab, or even a rudder? I've heard the NACA's are good, and I'm thinking 6-7% thickness.

[flailing]

I always use the NACA 0009, if that helps.

[Tom Hunt]

I always use naca 0009's and 0010's on my sailplane tails as they fly smoother than slab, and should produce less drag. In a "powered" sport model I never really found the need, whether they were all-fying or not.

All my "larger" scale models have the "scale" or assumed scale symmetrical sections on them.

Tom

[davidfee]

I've used the NACA 0006, 0008 and 0012 sections on tails with very satisfying results. In other words, nice precise control and no "odd behavior." The 0012 was used for a T-tail vertical which needed to contain a beefy servo. The 0006 and 0008 sections were used on horizontals.

-David

[MtnGoat]

thanks for the info, guys. I guess I don't need to go as thin as the 7%.

[hayman01]

I have used Mark Drela's sections on my ff stabs. http://www.charlesriverrc.org/articles/drelaairfoils/markdrela_tailairfoils.htm

Bill

video
http://www.paonline.com/hayman/video.htm

[davidfee]

Yes, Mark Drela's sections are particularly good for low Reynolds numbers (small/slow models). I have used a variant of his wing sections on a small pylon wing with excellent results.

-David