Hi
I need help with my RC model.
I want to know my CG and AC in the photo you will find the measurement also aileron dimension

Measures

Panel span

730
mm
Root chord

732
mm
Tip chord

400
mm
Sweep

109.1
mm
Angle

8.5
°
Results

Wing Area

82.64
dm²
MAC Distance

329.32
mm
MAC Length

582.23
mm
CG

165.66
mm
Wing Load

96.81
g/dm²
Deep linking URL

Wow! That's really large. Try this http://fwcg.3dzone.dk/

Do you consider adding a canard at the front to improve stability or stall cahracteristics or something? Good luck.

Thanks Teddy
No need for canard but my concern is there is small wing infront of the main big wing . So what I want to is that will effect if I consider only CG for the big wing and ignore the small one if yes it will effect how to calculate my CG and the dimensions of my ailerons ..

Thanks

I would ignore the small delta in front of your wing. It is small and close to the fuselage, The amount of lift that it generates will be negligible. If it really bugs you you could try this calculator: http://wingcgcalc.bruder.com.br/en_US/? It will let you build the wing in two panels.

When you look at these programs they don't take into effect the lift and drag effect of the fuselage

thanks basicguy
So what about aileron any idea about size

Many of the models that I have, have a 7" chord and have a 1-2" aileron chord. By scaling up to 700mm I would consider 100-200mm for an aileron chord.

I have not built on this scale so take it for what it is worth. Perhaps looking at a small homebuilt full size aircraft might give you some basis.

I typically shoot for at least 25% of chord. So if your chord (including ailerons/elevons) is 8, go for aileron/elevon chord of at least 2.
For model airplanes especially (where low Reynolds number facilitates flow separation more easily), it is much better to have a large control surface deflect a little than a small surface deflect a lot - you want to minimize the chance of flow separation.
Some RC planes have even much larger surfaces to achieve extreme 3D maneuvers.
I also just like the greater roll authority

Also, see https://www.rcgroups.com/forums/show....php?t=2189965, reports 50 and 51 (and some of the prior posts for more background). There are some cases where huge elevons are simply dictated by the constraints of the particular airplane.

Thanks all

Originally Posted by basicguy

I would ignore the small delta in front of your wing. It is small and close to the fuselage, The amount of lift that it generates will be negligible. If it really bugs you you could try this calculator: http://wingcgcalc.bruder.com.br/en_US/? It will let you build the wing in two panels.

When you look at these programs they don't take into effect the lift and drag effect of the fuselage

Now you can save your plans too. It was about time! http://winglib.com