hello there,
well i have a stupid question but am still a beginner

well, my question is that THEY say that most Trainer planes require 4 channels ==> 4 servos .......................... OK
what are the functions of these 4 servos you know like one for throttel control other for flaps and so on, what is teh SO ON here

i usually percepted that a trainer will have at least 5 servos (5 channels)
any elaboration?????
thanx for bearing this basic question...
have a nice day dudes