When the subject is flaps and the angles of extension it is always the angle of movement of the flap surface away from the in trail position of the airfoil. It is not the angle or travel of the servo output arm.

Now for the disclaimers I fully concur that flaps are not needed on a trainer, However this airplane (Avistar Elete) already comes with them and it is simple to activate with the addition of two servos and a Y chord. This converts it to a four servo wing. This is Not flaperons and there will be No flaperon mixing done in the transmitter. Just a two position switch is all that really needed, Ok three positions if you must although I do not recommend this.

Of the two dedicated flaps vs flaperons (which is just mixing in a flap fuction to your ailerons) dedicated flaps are far more desirable than flaperons.

Just a quick outline of what the flaps do:

Up to about 20 degrees they will increase lift and ad only a little drag.

Beyond 20 degrees they add considerable drag with not much more lift.

With those simple facts in mind when you do decide to mess with flaps my simple opinion is to set them just two position and down position no more than 20degrees. OK lets talk about what is going to happen the first time you apply the flaps. This should only be done in level flight and not when you are not trying to land. That first flip of the switch the airplane will pitch up maybe even shockingly so. You must be able to safely fly the airplane severely out of trim until such time you can safely trim it yourself. Only after you can do this would I ever suggest using flaps when you are new flyer.

Now there is a method of helping the pilot with this and it is a mix that is called 'Flap to Elevator'. What this does is when the flap is activated a preset degree of down elevator is applied. This does work and definitely helps the pilot however it is no pancea, it can take many flights to find the perfect combination and you will need to deal with big surprises each time. This is because no one is going be able to tell you that magic amout of down elevator to program, it is always hopefully an educated guess.

Most recently maybe three years now I got involved in Jets (actual turbines not the electric duct fans) and most of those have flaps and yes they really are needed to land safely and that is because of the residual thrust of the engines. Guess what at the three jet flys I have attended a very common conversation is that mix and how much down to program into it so the fellows don,t go bobbling all up and down every time they raise or lower the flaps.

This is not intended to scare you away krokodyl but only help you understand. I will shut up for now but there is much more to talk about when you get to the approach to landing phase with flaps down.

John