@Piotrsko I actually agree with you! On some....
Most WWII Warbirds had Ailerons on a Dihedral Wing. Doesn't have to be flat. 😉
I definitely agree that the first few Aircraft SHOULD have Dihedral. The self correcting properties are nearly essential.
As far as 3 vs 4 Channel... I'd recommend nearly ANY small to mini 3 Channel Plane.
But, for larger Airframes (roughly 900mm or more), 4 Channel is a better way to go.
WHY? Because of the new fangled 2.4GhZ Radios! BTW I'm only JUST getting used to using myself. 😜
One Phrase - Channel Mixing! You could program (OR get a friend who knows what they're doing!), a Channel Mix.
.... If you mix a couple of degrees of Rudder WITH the Ailerons, you've then got automatic coordination.
Meaning, all you do on the Tx, is input some Right Aileron on the Right Stick only - and a little Right Rudder is AUTOMATICALLY added, for a smooth stress free Turn!
Of course, there's other Channel combinations that could be mixed...
On a Twin Engine model, you could mix in a little (or a lot!!) of Differential Thrust, to do the same thing - and not even cut the Rudder Hinge!! 😯
Trust me, I'm NOT saying that the old, big lumbering 3 Channel Bird is going extinct. In fact Kids today are even revisiting 30's and 40's Designs!!
But as much as I hated it at first, the new stuff has really boosted the Hobby! Also made it more affordable for more People.
..... and I DON'T miss turning in my 72MHz Transmitter every time I went to a Field!!! 😃😋
~ and thanks for making me feel YOUNG, even if just for a moment!