hello,

I am beginer in aerobatic flight, and I would like to know what is exactly the "rudder coupling" effect and the "aileron coupling effect".

I try to learn to knife edge and I see that plenty of you talk about that problem

thanks a lot

when we talk about roll or pitch coupling with the rudder??

when you apply rudder, for aerobatic models, you only want the rudder to yaw the plane, with no roll or pitch.

some models may pitch either way when rudder is applied, or roll either way, some models roll and pitch which makes knife edge very hard work.

if it is only a little, some people (cheats) mix it out on a program on the transmitter, some do it on the sticks.

a number of things can cause it........

dihedral, centre of gravity, decalage, thrust angle, fuselage shape, i am sure there are lots more

Rudder size and shape

"The only dumb question is the one you didn't ask"
Remember that
Luis

(although I am sure there are some exceptions to that rule)

Like this one :-

Do planes fly ??

What does an airplane do with those things in the front? I think they are called.....umm....engines?? they look sooo funny! [8D]

Lots of side area helps.