Airfoiled horizontal stabilizer

[Kurt dunkin]

Hi!!

I need some insight

Does the center of gravity changes on the plane if the horizontal stabilizer has airfoil in it. Does the C.G. go aft of the fuse or forward need some help ?

Im thinking if it has airfoil the tail will have more lift than i guess

Plus i guess there should not be any angle of attack to the stabilizer if you have an airfoil. zero all the way

Kurt

[Sparky Paul]

The plane will be very good for a single flight condition, but require attention when not at that condition.
Lifting stabs are what make free flight planes stable, for the glide mode.
A lifting stab lets you move the c.g. aft.
The tail airfoil will have an angle of attack if it's mounted normally, with the belly of the airfoil level with the FRL.
Trim the elevator or shim the wing to adjust for best cruise.

[Kurt dunkin]

Thanks for help

I gues a symetrical airfoil will produce zero lift if used on a tail section

[Sparky Paul]

No, all horizontals lift. But mostly it's down, to counteract the nose-down pitching moment of most airfoils.
A properly installed symmetrical horizontal will have the elevator faired with the stabilizer at one trim speed.
The amount of stability it provides to the plane will more "symmetrical" in terms of pitching up and down than an airfoiled section.

[Cyclops]

They are the best thing you can do for preventing stalls and crashing on takeoffs or landings.:)

I know that for a fact. All my planes can glide at slow walking speeds. :D

I use airfoils on the vertical also.:eek:

[Kurt dunkin]

thanks guys