New to the forum, lots of great information here!  My question is in regards to the elevator. I gather from other post that the stab/elevator should be 20-25% of the wing area. What percentage of the stab/elevator assembly should the elevator be?

Thanks in advance,
Jim

New to the forum, lots of great information here!  My question is in regards to the elevator. I gather from other post that the stab/elevator should be 20-25% of the wing area. What percentage of the stab/elevator assembly should the elevator be?

Thanks in advance,
Jim

HI Jim

The Katana and Exel I have flown for the past 14 years have been  25% of the wing area, and are 4.24 A/R , it is close to the 55% 45% stab to elevator
My piped SV-11 is close to the same
This works very well for me. Others mileage may vary.
I also flew a High A/R tail on my VECTRA with good results
I will tell you it is much easier to built a stiffer Stab and Elev with a lower A?R

Regards
Randy

Seems to work better if the LE of the stab is pointy instead of blunt also

Randy

I have seen some stab/elevator designs where the stab was 1/2" and the elevator 3/8".  Or, perhaps 3/8" and 1/4".  Anyway, there seems to be some aerodynamic reason to make the stab thicker than the elevator.  Or is it just for strength?
Floyd

   No, the theory is to "desensitze it around neutral". The theory is that you "block" the relative wind so that the elevator can move a little before anything happens. At Mach 10, it might actually do that, what it does at 60 mph is unclear, aside from making the elevator run in turbulence all the time.

    Mine is exactly conformal to the stab (made in one piece and then cut apart) and has all the corners rounded to minimize the turbulence. I think you don't want it to desensitize it around neutral and I doubt that making the stab thicker actually accomplishes that.   

    Brett