I am wondering of what the effect will be of using strip type ailerons on a wing, when they are far aft of both the MAC of the wing, and of the neutral point of the airframe. The aileron will be around 24" long and 3" wide (cord).
The wing itself is a bit unusual as it will have a 84 " root cord with a 36" tip cord and a span of only 36". The wing will be on the order of 10" thick at the root and approx. 1.5" at the tip with the top of the wing flat with the taper forming the dihedral.

Any Ideas/comments?

So it's an odd looking delta wing with cut off tips. No problemo. And at that point they aren't really ailerons. It's normal in such cases to mix the aileron and elevator channels and use elevons for this sort of design.

That's a LOT of wing area though. Be sure to post pics of it under construction in the Scratch Building forum. It's nice to see the oddballs in there.

Thanks for the answer Bruce it confirmed my guess...
You are right that is a lot of wing area, I am looking very low wing loading in this bird.
And I am going to post the Scratch Building Forum as soon as I finish here...
BTW here is another part of the same plane:
http://www.rcuniverse.com/forum/m_5646352/tm.htm


It is in the scratch Build Design Forum:
http://www.rcuniverse.com/forum/m_56...tm.htm#5680254

How effective are full span elevons?
When used in a flying tail type of configuration.

If you're referring to post#15 in the thread you referred to, are you still using an elevator or stabilator tail? If so, I don't think you'd want to use your ailerons as elevons. If you use elevons in that configuration, your conventional h-tail will be fighting the elevons in pitch. You are probably better off using whatever surface is farthest from the CG as your pitch control.

Ron,
I am going to be using the stabilator tail, I was just wondering how effective the aileron function would be in that type of setup. I had not thought about using the ailerons as elevons although I was still thinking of using them as ailerons per say although with limited throw to assist the stabilators....if that is even needed.
The design itself is still in a state of flux, I am going to be working on it a bit later today.
I had posted the last question in regard to the stabilator setup, I was not sure that it would be all that effective for roll control.
I have no experience with a sabilator type of setup and was wondering how effective it was.
Regards
Paul

I think your aileron initial sizing would work fine, as long as you don't require high roll rates. You could go slightly larger if you wanted.

The planform reminds me once again of a Dornier(?) flying boat flown in the 70's (?), with the reverse delta planform. Although I was informed (by Tall Paul in this forum long ago) the craft did not have ailerons, and was licensed as a boat (that could rise off the water in ground effect).

Good luck with the project!

High roll rates are not something I am looking for in this design, positive control is the objective not aerobatics.

The boats you are talking about are WIG wing in ground effect, there are several still in the course of development. The most recent I recall was from the land down under, also they are being researched in the far east. I have thought about it myself perhaps I may play with it in the future, when I get to old to fly anymore. Last time I checked there was no medical required for boats...