ORIGINAL: oldtyme
Turns should be done with coordinated rudder and aileron otherwise you are ''skidding'' around a turn. When I was taking flying lessons, I got to know exactly what ''step on the ball'' meant. Rudder management is essential in take-offs and landings as well....to fly with ailerons only is just lazy sloppy flying.
The type of A/C the OP is talking about are generally hand launched and don't usually have a rudder to save weight, space, and limit complexity. They don't carry passengers and are intended to be for fun at small fields, so the whole rudder thing is really not necessary. Small .049 powered rudder and elevator only planes have been flow for decades, and you would never operate a full scale that way either. These small planes are for fun on a budget, or when you just want to throw it in the car and go, don't take it to seriously.