In order to help the handgrip handling, the controls are positioned outside the cockpit and are not at the same airplane scale. This may seem a little confusing but lets the user an easiest manipulation of controls that would be impossible otherwise.
SECONDARY CONTROL SURFACES
This is a very especial LEGO Technic project. As you probably discovered at any time along hours of playing, LEGO Technic, in contrast with other LEGO categories, is not a friendly brick construction system for airplanes or other aerodynamic shaped items. So it is not rare the lack of plane models in the commercial LEGO Technic sets. In fact, the implementation of such a model is a very big challenge.
The target of this project is to make an educational and semi-functional airplane model having the basic control surfaces of a standard airplane. Of course, the plane does not fly. The LEGO elements are too heavy and the motors are not powerful enough to reach a velocity suitable to take-off. However the fact of having the same control elements that you can find in standard airplanes is amazing and instructive.
In contrast with many LEGO designs, this set does not try to reproduce a specific real airplane. The concept here is to have a useful model for instructional purposes.
PRIMARY CONTROL SURFACES
As in any airplane you can find three primary control surfaces: ailerons, elevator and rudder.
In some airplanes you can find secondary control surfaces in order to add fly performance. So flaps and spoilers are implemented in this model too.